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16 Nov 2022
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16 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022117
SUBJ: SVN55 (PRN15) FORECAST OUTAGE SUMMARY JDAY 320/1118 - JDAY 320/2020
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022117
NANU DTG: 162029Z NOV 2022
REFERENCE NANU: 2022114
REF NANU DTG: 142000Z NOV 2022
SVN: 55
PRN: 15
START JDAY: 320
START TIME ZULU: 1118
START CALENDAR DATE: 16 NOV 2022
STOP JDAY: 320
STOP TIME ZULU: 2020
STOP CALENDAR DATE: 16 NOV 2022

2. CONDITION: GPS SATELLITE SVN55 (PRN15) WAS UNUSABLE ON JDAY 320
(16 NOV 2022) BEGINNING 1118 ZULU UNTIL JDAY 320 (16 NOV 2022)
ENDING 2020 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022116
SUBJ: SVN67 (PRN06) FORECAST OUTAGE SUMMARY JDAY 319/0424 - JDAY 319/0536
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022116
NANU DTG: 150541Z NOV 2022
REFERENCE NANU: 2022111
REF NANU DTG: 091847Z NOV 2022
SVN: 67
PRN: 06
START JDAY: 319
START TIME ZULU: 0424
START CALENDAR DATE: 15 NOV 2022
STOP JDAY: 319
STOP TIME ZULU: 0536
STOP CALENDAR DATE: 15 NOV 2022

2. CONDITION: GPS SATELLITE SVN67 (PRN06) WAS UNUSABLE ON JDAY 319
(15 NOV 2022) BEGINNING 0424 ZULU UNTIL JDAY 319 (15 NOV 2022)
ENDING 0536 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022115
SUBJ: SVN48 (PRN07) FORECAST OUTAGE SUMMARY JDAY 318/2200 - JDAY 319/0315
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022115
NANU DTG: 150319Z NOV 2022
REFERENCE NANU: 2022110
REF NANU DTG: 091839Z NOV 2022
SVN: 48
PRN: 07
START JDAY: 318
START TIME ZULU: 2200
START CALENDAR DATE: 14 NOV 2022
STOP JDAY: 319
STOP TIME ZULU: 0315
STOP CALENDAR DATE: 15 NOV 2022

2. CONDITION: GPS SATELLITE SVN48 (PRN07) WAS UNUSABLE ON JDAY 318
(14 NOV 2022) BEGINNING 2200 ZULU UNTIL JDAY 319 (15 NOV 2022)
ENDING 0315 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022114
SUBJ: SVN55 (PRN15) FORECAST OUTAGE JDAY 320/1100 - JDAY 320/2300
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022114
NANU DTG: 142000Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 55
PRN: 15
START JDAY: 320
START TIME ZULU: 1100
START CALENDAR DATE: 16 NOV 2022
STOP JDAY: 320
STOP TIME ZULU: 2300
STOP CALENDAR DATE: 16 NOV 2022

2. CONDITION: GPS SATELLITE SVN55 (PRN15) WILL BE UNUSABLE ON JDAY 320
(16 NOV 2022) BEGINNING 1100 ZULU UNTIL JDAY 320 (16 NOV 2022)
ENDING 2300 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


10 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022113
SUBJ: SVN61 (PRN02) FORECAST OUTAGE SUMMARY JDAY 314/0110 - JDAY 314/0735
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022113
NANU DTG: 100736Z NOV 2022
REFERENCE NANU: 2022095
REF NANU DTG: 021527Z NOV 2022
SVN: 61
PRN: 02
START JDAY: 314
START TIME ZULU: 0110
START CALENDAR DATE: 10 NOV 2022
STOP JDAY: 314
STOP TIME ZULU: 0735
STOP CALENDAR DATE: 10 NOV 2022

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WAS UNUSABLE ON JDAY 314
(10 NOV 2022) BEGINNING 0110 ZULU UNTIL JDAY 314 (10 NOV 2022)
ENDING 0735 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


09 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022112
SUBJ: SVN52 (PRN31) FORECAST OUTAGE SUMMARY JDAY 313/1947 - JDAY 313/2056
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022112
NANU DTG: 092111Z NOV 2022
REFERENCE NANU: 2022107
REF NANU DTG: 042042Z NOV 2022
SVN: 52
PRN: 31
START JDAY: 313
START TIME ZULU: 1947
START CALENDAR DATE: 09 NOV 2022
STOP JDAY: 313
STOP TIME ZULU: 2056
STOP CALENDAR DATE: 09 NOV 2022

2. CONDITION: GPS SATELLITE SVN52 (PRN31) WAS UNUSABLE ON JDAY 313
(09 NOV 2022) BEGINNING 1947 ZULU UNTIL JDAY 313 (09 NOV 2022)
ENDING 2056 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


09 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022111
SUBJ: SVN67 (PRN06) FORECAST OUTAGE JDAY 319/0415 - JDAY 319/1615
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022111
NANU DTG: 091847Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 67
PRN: 06
START JDAY: 319
START TIME ZULU: 0415
START CALENDAR DATE: 15 NOV 2022
STOP JDAY: 319
STOP TIME ZULU: 1615
STOP CALENDAR DATE: 15 NOV 2022

2. CONDITION: GPS SATELLITE SVN67 (PRN06) WILL BE UNUSABLE ON JDAY 319
(15 NOV 2022) BEGINNING 0415 ZULU UNTIL JDAY 319 (15 NOV 2022)
ENDING 1615 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


09 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022110
SUBJ: SVN48 (PRN07) FORECAST OUTAGE JDAY 318/2200 - JDAY 319/1000
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022110
NANU DTG: 091839Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 48
PRN: 07
START JDAY: 318
START TIME ZULU: 2200
START CALENDAR DATE: 14 NOV 2022
STOP JDAY: 319
STOP TIME ZULU: 1000
STOP CALENDAR DATE: 15 NOV 2022

2. CONDITION: GPS SATELLITE SVN48 (PRN07) WILL BE UNUSABLE ON JDAY 318
(14 NOV 2022) BEGINNING 2200 ZULU UNTIL JDAY 319 (15 NOV 2022)
ENDING 1000 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


07 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022109
SUBJ: SVN55 (PRN15) FORECAST OUTAGE SUMMARY JDAY 311/1211 - JDAY 311/1344
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022109
NANU DTG: 071351Z NOV 2022
REFERENCE NANU: 2022106
REF NANU DTG: 042037Z NOV 2022
SVN: 55
PRN: 15
START JDAY: 311
START TIME ZULU: 1211
START CALENDAR DATE: 07 NOV 2022
STOP JDAY: 311
STOP TIME ZULU: 1344
STOP CALENDAR DATE: 07 NOV 2022

2. CONDITION: GPS SATELLITE SVN55 (PRN15) WAS UNUSABLE ON JDAY 311
(07 NOV 2022) BEGINNING 1211 ZULU UNTIL JDAY 311 (07 NOV 2022)
ENDING 1344 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


07 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022108
SUBJ: SVN50 (PRN05) FORECAST OUTAGE SUMMARY JDAY 311/1008 - JDAY 311/1222
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022108
NANU DTG: 071223Z NOV 2022
REFERENCE NANU: 2022105
REF NANU DTG: 042030Z NOV 2022
SVN: 50
PRN: 05
START JDAY: 311
START TIME ZULU: 1008
START CALENDAR DATE: 07 NOV 2022
STOP JDAY: 311
STOP TIME ZULU: 1222
STOP CALENDAR DATE: 07 NOV 2022

2. CONDITION: GPS SATELLITE SVN50 (PRN05) WAS UNUSABLE ON JDAY 311
(07 NOV 2022) BEGINNING 1008 ZULU UNTIL JDAY 311 (07 NOV 2022)
ENDING 1222 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022107
SUBJ: SVN52 (PRN31) FORECAST OUTAGE RESCHEDULED
1. NANU TYPE: FCSTRESCD
NANU NUMBER: 2022107
NANU DTG: 042042Z NOV 2022
REFERENCE NANU: 2022094
REF NANU DTG: 021518Z NOV 2022
SVN: 52
PRN: 31
START JDAY: 313
START TIME ZULU: 1945
START CALENDAR DATE: 09 NOV 2022
STOP JDAY: 314
STOP TIME ZULU: 0745
STOP CALENDAR DATE: 10 NOV 2022

2. CONDITION: GPS SATELLITE SVN52 (PRN31) WILL BE UNUSABLE ON JDAY 313
(09 NOV 2022) BEGINNING 1945 ZULU UNTIL JDAY 314 (10 NOV 2022)
ENDING 0745 ZULU. PLEASE REFERENCE NANU NUMBER 2022094
DTG 021518Z NOV 2022 FOR THE ORIGINAL OUTAGE TIME.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022106
SUBJ: SVN55 (PRN15) FORECAST OUTAGE RESCHEDULED
1. NANU TYPE: FCSTRESCD
NANU NUMBER: 2022106
NANU DTG: 042037Z NOV 2022
REFERENCE NANU: 2022093
REF NANU DTG: 021513Z NOV 2022
SVN: 55
PRN: 15
START JDAY: 311
START TIME ZULU: 1200
START CALENDAR DATE: 07 NOV 2022
STOP JDAY: 312
STOP TIME ZULU: 0000
STOP CALENDAR DATE: 08 NOV 2022

2. CONDITION: GPS SATELLITE SVN55 (PRN15) WILL BE UNUSABLE ON JDAY 311
(07 NOV 2022) BEGINNING 1200 ZULU UNTIL JDAY 312 (08 NOV 2022)
ENDING 0000 ZULU. PLEASE REFERENCE NANU NUMBER 2022093
DTG 021513Z NOV 2022 FOR THE ORIGINAL OUTAGE TIME.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022105
SUBJ: SVN50 (PRN05) FORECAST OUTAGE RESCHEDULED
1. NANU TYPE: FCSTRESCD
NANU NUMBER: 2022105
NANU DTG: 042030Z NOV 2022
REFERENCE NANU: 2022092
REF NANU DTG: 021508Z NOV 2022
SVN: 50
PRN: 05
START JDAY: 311
START TIME ZULU: 1000
START CALENDAR DATE: 07 NOV 2022
STOP JDAY: 311
STOP TIME ZULU: 2200
STOP CALENDAR DATE: 07 NOV 2022

2. CONDITION: GPS SATELLITE SVN50 (PRN05) WILL BE UNUSABLE ON JDAY 311
(07 NOV 2022) BEGINNING 1000 ZULU UNTIL JDAY 311 (07 NOV 2022)
ENDING 2200 ZULU. PLEASE REFERENCE NANU NUMBER 2022092
DTG 021508Z NOV 2022 FOR THE ORIGINAL OUTAGE TIME.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022104 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
Please disregard NANU 2022101. Please reference NANU 2022103 instead.
*** GENERAL MESSAGE TO ALL GPS USERS ***

POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022103
SUBJ: SVN57 (PRN29) UNUSABLE JDAY 308/0843 - JDAY 308/1032
1. NANU TYPE: UNUNOREF
NANU NUMBER: 2022103
NANU DTG: 041435Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 57
PRN: 29
START JDAY: 308
START TIME ZULU: 0843
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: 308
STOP TIME ZULU: 1032
STOP CALENDAR DATE: 04 NOV 2022

2. CONDITION: GPS SATELLITE SVN57 (PRN29) WAS UNUSABLE ON JDAY 308
(04 NOV 2022) BEGINNING 0843 ZULU UNTIL JDAY 308 (04 NOV 2022)
ENDING 1032 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022102
SUBJ: SVN57 (PRN29) FORECAST OUTAGE CANCELED
1. NANU TYPE: FCSTCANC
NANU NUMBER: 2022102
NANU DTG: 041426Z NOV 2022
REFERENCE NANU: 2022100
REF NANU DTG: 040958Z NOV 2022
SVN: 57
PRN: 29
START JDAY: 308
START TIME ZULU: 0843
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: CANCELLED
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVN57 (PRN29) SCHEDULED FOR
JDAY 308 (04 NOV 2022) BEGINNING 0843 ZULU HAS BEEN CANCELED.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022101
SUBJ: SVN57 (PRN29) UNUSABLE JDAY 308/0843 - JDAY 308/1032
1. NANU TYPE: UNUSABLE
NANU NUMBER: 2022101
NANU DTG: 041035Z NOV 2022
REFERENCE NANU: 2022100
REF NANU DTG: 040958Z NOV 2022
SVN: 57
PRN: 29
START JDAY: 308
START TIME ZULU: 0843
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: 308
STOP TIME ZULU: 1032
STOP CALENDAR DATE: 04 NOV 2022

2. CONDITION: GPS SATELLITE SVN57 (PRN29) WAS UNUSABLE ON JDAY 308
(04 NOV 2022) BEGINNING 0843 ZULU UNTIL JDAY 308 (04 NOV 2022)
ENDING 1032 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022100
SUBJ: SVN57 (PRN29) FORECAST OUTAGE JDAY 308/0843 - UNTIL FURTHER NOTICE
1. NANU TYPE: FCSTUUFN
NANU NUMBER: 2022100
NANU DTG: 040958Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 57
PRN: 29
START JDAY: 308
START TIME ZULU: 0843
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN57 (PRN29) WILL BE UNUSABLE NO EARLIER THAN JDAY 308
(04 NOV 2022) BEGINNING 0843 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022099
SUBJ: SVN57 (PRN29) FORECAST OUTAGE CANCELED
1. NANU TYPE: FCSTCANC
NANU NUMBER: 2022099
NANU DTG: 040933Z NOV 2022
REFERENCE NANU: 2022091
REF NANU DTG: 281852Z OCT 2022
SVN: 57
PRN: 29
START JDAY: 308
START TIME ZULU: 0845
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: CANCELLED
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVN57 (PRN29) SCHEDULED FOR
JDAY 308 (04 NOV 2022) BEGINNING 0845 ZULU HAS BEEN CANCELED.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022098
SUBJ: SVN53 (PRN17) FORECAST OUTAGE SUMMARY JDAY 308/0417 - JDAY 308/0649
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022098
NANU DTG: 040649Z NOV 2022
REFERENCE NANU: 2022090
REF NANU DTG: 281848Z OCT 2022
SVN: 53
PRN: 17
START JDAY: 308
START TIME ZULU: 0417
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: 308
STOP TIME ZULU: 0649
STOP CALENDAR DATE: 04 NOV 2022

2. CONDITION: GPS SATELLITE SVN53 (PRN17) WAS UNUSABLE ON JDAY 308
(04 NOV 2022) BEGINNING 0417 ZULU UNTIL JDAY 308 (04 NOV 2022)
ENDING 0649 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


03 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022097
SUBJ: SVN58 (PRN12) FORECAST OUTAGE SUMMARY JDAY 307/0555 - JDAY 307/0832
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022097
NANU DTG: 030856Z NOV 2022
REFERENCE NANU: 2022089
REF NANU DTG: 281844Z OCT 2022
SVN: 58
PRN: 12
START JDAY: 307
START TIME ZULU: 0555
START CALENDAR DATE: 03 NOV 2022
STOP JDAY: 307
STOP TIME ZULU: 0832
STOP CALENDAR DATE: 03 NOV 2022

2. CONDITION: GPS SATELLITE SVN58 (PRN12) WAS UNUSABLE ON JDAY 307
(03 NOV 2022) BEGINNING 0555 ZULU UNTIL JDAY 307 (03 NOV 2022)
ENDING 0832 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


02 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022096
SUBJ: SVN64 (PRN30) FORECAST OUTAGE SUMMARY JDAY 307/0019 - JDAY 307/0155
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022096
NANU DTG: 030158Z NOV 2022
REFERENCE NANU: 2022088
REF NANU DTG: 281837Z OCT 2022
SVN: 64
PRN: 30
START JDAY: 307
START TIME ZULU: 0019
START CALENDAR DATE: 03 NOV 2022
STOP JDAY: 307
STOP TIME ZULU: 0155
STOP CALENDAR DATE: 03 NOV 2022

2. CONDITION: GPS SATELLITE SVN64 (PRN30) WAS UNUSABLE ON JDAY 307
(03 NOV 2022) BEGINNING 0019 ZULU UNTIL JDAY 307 (03 NOV 2022)
ENDING 0155 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


02 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022095
SUBJ: SVN61 (PRN02) FORECAST OUTAGE JDAY 314/0100 - JDAY 315/0100
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022095
NANU DTG: 021527Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 61
PRN: 02
START JDAY: 314
START TIME ZULU: 0100
START CALENDAR DATE: 10 NOV 2022
STOP JDAY: 315
STOP TIME ZULU: 0100
STOP CALENDAR DATE: 11 NOV 2022

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WILL BE UNUSABLE ON JDAY 314
(10 NOV 2022) BEGINNING 0100 ZULU UNTIL JDAY 315 (11 NOV 2022)
ENDING 0100 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


02 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022094
SUBJ: SVN52 (PRN31) FORECAST OUTAGE JDAY 313/1945 - JDAY 313/2145
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022094
NANU DTG: 021518Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 52
PRN: 31
START JDAY: 313
START TIME ZULU: 1945
START CALENDAR DATE: 09 NOV 2022
STOP JDAY: 313
STOP TIME ZULU: 2145
STOP CALENDAR DATE: 09 NOV 2022

2. CONDITION: GPS SATELLITE SVN52 (PRN31) WILL BE UNUSABLE ON JDAY 313
(09 NOV 2022) BEGINNING 1945 ZULU UNTIL JDAY 313 (09 NOV 2022)
ENDING 2145 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


02 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022093
SUBJ: SVN55 (PRN15) FORECAST OUTAGE JDAY 311/1315 - JDAY 311/1500
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022093
NANU DTG: 021513Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 55
PRN: 15
START JDAY: 311
START TIME ZULU: 1315
START CALENDAR DATE: 07 NOV 2022
STOP JDAY: 311
STOP TIME ZULU: 1500
STOP CALENDAR DATE: 07 NOV 2022

2. CONDITION: GPS SATELLITE SVN55 (PRN15) WILL BE UNUSABLE ON JDAY 311
(07 NOV 2022) BEGINNING 1315 ZULU UNTIL JDAY 311 (07 NOV 2022)
ENDING 1500 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


02 Nov 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022092
SUBJ: SVN50 (PRN05) FORECAST OUTAGE JDAY 311/1130 - JDAY 311/1315
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022092
NANU DTG: 021508Z NOV 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 50
PRN: 05
START JDAY: 311
START TIME ZULU: 1130
START CALENDAR DATE: 07 NOV 2022
STOP JDAY: 311
STOP TIME ZULU: 1315
STOP CALENDAR DATE: 07 NOV 2022

2. CONDITION: GPS SATELLITE SVN50 (PRN05) WILL BE UNUSABLE ON JDAY 311
(07 NOV 2022) BEGINNING 1130 ZULU UNTIL JDAY 311 (07 NOV 2022)
ENDING 1315 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022091
SUBJ: SVN57 (PRN29) FORECAST OUTAGE JDAY 308/0845 - JDAY 308/2045
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022091
NANU DTG: 281852Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 57
PRN: 29
START JDAY: 308
START TIME ZULU: 0845
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: 308
STOP TIME ZULU: 2045
STOP CALENDAR DATE: 04 NOV 2022

2. CONDITION: GPS SATELLITE SVN57 (PRN29) WILL BE UNUSABLE ON JDAY 308
(04 NOV 2022) BEGINNING 0845 ZULU UNTIL JDAY 308 (04 NOV 2022)
ENDING 2045 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022090
SUBJ: SVN53 (PRN17) FORECAST OUTAGE JDAY 308/0000 - JDAY 308/1200
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022090
NANU DTG: 281848Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 53
PRN: 17
START JDAY: 308
START TIME ZULU: 0000
START CALENDAR DATE: 04 NOV 2022
STOP JDAY: 308
STOP TIME ZULU: 1200
STOP CALENDAR DATE: 04 NOV 2022

2. CONDITION: GPS SATELLITE SVN53 (PRN17) WILL BE UNUSABLE ON JDAY 308
(04 NOV 2022) BEGINNING 0000 ZULU UNTIL JDAY 308 (04 NOV 2022)
ENDING 1200 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022089
SUBJ: SVN58 (PRN12) FORECAST OUTAGE JDAY 307/0555 - JDAY 307/1755
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022089
NANU DTG: 281844Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 58
PRN: 12
START JDAY: 307
START TIME ZULU: 0555
START CALENDAR DATE: 03 NOV 2022
STOP JDAY: 307
STOP TIME ZULU: 1755
STOP CALENDAR DATE: 03 NOV 2022

2. CONDITION: GPS SATELLITE SVN58 (PRN12) WILL BE UNUSABLE ON JDAY 307
(03 NOV 2022) BEGINNING 0555 ZULU UNTIL JDAY 307 (03 NOV 2022)
ENDING 1755 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022088
SUBJ: SVN64 (PRN30) FORECAST OUTAGE JDAY 306/2355 - JDAY 307/1155
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022088
NANU DTG: 281837Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 64
PRN: 30
START JDAY: 306
START TIME ZULU: 2355
START CALENDAR DATE: 02 NOV 2022
STOP JDAY: 307
STOP TIME ZULU: 1155
STOP CALENDAR DATE: 03 NOV 2022

2. CONDITION: GPS SATELLITE SVN64 (PRN30) WILL BE UNUSABLE ON JDAY 306
(02 NOV 2022) BEGINNING 2355 ZULU UNTIL JDAY 307 (03 NOV 2022)
ENDING 1155 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


21 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022087
SUBJ: SVN63 (PRN01) FORECAST OUTAGE SUMMARY JDAY 294/1803 - JDAY 294/1954
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022087
NANU DTG: 211956Z OCT 2022
REFERENCE NANU: 2022078
REF NANU DTG: 141911Z OCT 2022
SVN: 63
PRN: 01
START JDAY: 294
START TIME ZULU: 1803
START CALENDAR DATE: 21 OCT 2022
STOP JDAY: 294
STOP TIME ZULU: 1954
STOP CALENDAR DATE: 21 OCT 2022

2. CONDITION: GPS SATELLITE SVN63 (PRN01) WAS UNUSABLE ON JDAY 294
(21 OCT 2022) BEGINNING 1803 ZULU UNTIL JDAY 294 (21 OCT 2022)
ENDING 1954 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


21 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022086 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
On approximately 27 OCT 2022, SVN49 will resume transmitting L-band utilizing PRN28; at L-band activation, SVN49/PRN28 will be unusable until further notice (additionally, no broadcast almanacs will include SVN49/PRN28 until further notice).
*** GENERAL MESSAGE TO ALL GPS USERS ***

POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


21 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022085
SUBJ: SVN73 (PRN10) FORECAST OUTAGE SUMMARY JDAY 294/1418 - JDAY 294/1555
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022085
NANU DTG: 211556Z OCT 2022
REFERENCE NANU: 2022077
REF NANU DTG: 141908Z OCT 2022
SVN: 73
PRN: 10
START JDAY: 294
START TIME ZULU: 1418
START CALENDAR DATE: 21 OCT 2022
STOP JDAY: 294
STOP TIME ZULU: 1555
STOP CALENDAR DATE: 21 OCT 2022

2. CONDITION: GPS SATELLITE SVN73 (PRN10) WAS UNUSABLE ON JDAY 294
(21 OCT 2022) BEGINNING 1418 ZULU UNTIL JDAY 294 (21 OCT 2022)
ENDING 1555 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


20 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022084
SUBJ: SVN72 (PRN08) FORECAST OUTAGE SUMMARY JDAY 294/0017 - JDAY 294/0122
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022084
NANU DTG: 210129Z OCT 2022
REFERENCE NANU: 2022076
REF NANU DTG: 141904Z OCT 2022
SVN: 72
PRN: 08
START JDAY: 294
START TIME ZULU: 0017
START CALENDAR DATE: 21 OCT 2022
STOP JDAY: 294
STOP TIME ZULU: 0122
STOP CALENDAR DATE: 21 OCT 2022

2. CONDITION: GPS SATELLITE SVN72 (PRN08) WAS UNUSABLE ON JDAY 294
(21 OCT 2022) BEGINNING 0017 ZULU UNTIL JDAY 294 (21 OCT 2022)
ENDING 0122 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


20 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022083
SUBJ: SVN71 (PRN26) FORECAST OUTAGE SUMMARY JDAY 293/2144 - JDAY 293/2337
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022083
NANU DTG: 202338Z OCT 2022
REFERENCE NANU: 2022075
REF NANU DTG: 141857Z OCT 2022
SVN: 71
PRN: 26
START JDAY: 293
START TIME ZULU: 2144
START CALENDAR DATE: 20 OCT 2022
STOP JDAY: 293
STOP TIME ZULU: 2337
STOP CALENDAR DATE: 20 OCT 2022

2. CONDITION: GPS SATELLITE SVN71 (PRN26) WAS UNUSABLE ON JDAY 293
(20 OCT 2022) BEGINNING 2144 ZULU UNTIL JDAY 293 (20 OCT 2022)
ENDING 2337 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022082
SUBJ: SVN66 (PRN27) FORECAST OUTAGE SUMMARY JDAY 292/2352 - JDAY 293/0054
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022082
NANU DTG: 200101Z OCT 2022
REFERENCE NANU: 2022074
REF NANU DTG: 141657Z OCT 2022
SVN: 66
PRN: 27
START JDAY: 292
START TIME ZULU: 2352
START CALENDAR DATE: 19 OCT 2022
STOP JDAY: 293
STOP TIME ZULU: 0054
STOP CALENDAR DATE: 20 OCT 2022

2. CONDITION: GPS SATELLITE SVN66 (PRN27) WAS UNUSABLE ON JDAY 292
(19 OCT 2022) BEGINNING 2352 ZULU UNTIL JDAY 293 (20 OCT 2022)
ENDING 0054 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022081
SUBJ: SVN69 (PRN03) FORECAST OUTAGE SUMMARY JDAY 292/1923 - JDAY 292/2055
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022081
NANU DTG: 192106Z OCT 2022
REFERENCE NANU: 2022073
REF NANU DTG: 141640Z OCT 2022
SVN: 69
PRN: 03
START JDAY: 292
START TIME ZULU: 1923
START CALENDAR DATE: 19 OCT 2022
STOP JDAY: 292
STOP TIME ZULU: 2055
STOP CALENDAR DATE: 19 OCT 2022

2. CONDITION: GPS SATELLITE SVN69 (PRN03) WAS UNUSABLE ON JDAY 292
(19 OCT 2022) BEGINNING 1923 ZULU UNTIL JDAY 292 (19 OCT 2022)
ENDING 2055 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


18 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022080
SUBJ: SVN68 (PRN09) FORECAST OUTAGE SUMMARY JDAY 291/2220 - JDAY 292/0006
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022080
NANU DTG: 190014Z OCT 2022
REFERENCE NANU: 2022072
REF NANU DTG: 141634Z OCT 2022
SVN: 68
PRN: 09
START JDAY: 291
START TIME ZULU: 2220
START CALENDAR DATE: 18 OCT 2022
STOP JDAY: 292
STOP TIME ZULU: 0006
STOP CALENDAR DATE: 19 OCT 2022

2. CONDITION: GPS SATELLITE SVN68 (PRN09) WAS UNUSABLE ON JDAY 291
(18 OCT 2022) BEGINNING 2220 ZULU UNTIL JDAY 292 (19 OCT 2022)
ENDING 0006 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


18 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022079
SUBJ: SVN65 (PRN24) FORECAST OUTAGE SUMMARY JDAY 291/1452 - JDAY 291/1707
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022079
NANU DTG: 181709Z OCT 2022
REFERENCE NANU: 2022071
REF NANU DTG: 141627Z OCT 2022
SVN: 65
PRN: 24
START JDAY: 291
START TIME ZULU: 1452
START CALENDAR DATE: 18 OCT 2022
STOP JDAY: 291
STOP TIME ZULU: 1707
STOP CALENDAR DATE: 18 OCT 2022

2. CONDITION: GPS SATELLITE SVN65 (PRN24) WAS UNUSABLE ON JDAY 291
(18 OCT 2022) BEGINNING 1452 ZULU UNTIL JDAY 291 (18 OCT 2022)
ENDING 1707 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022078
SUBJ: SVN63 (PRN01) FORECAST OUTAGE JDAY 294/1730 - JDAY 294/2130
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022078
NANU DTG: 141911Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 63
PRN: 01
START JDAY: 294
START TIME ZULU: 1730
START CALENDAR DATE: 21 OCT 2022
STOP JDAY: 294
STOP TIME ZULU: 2130
STOP CALENDAR DATE: 21 OCT 2022

2. CONDITION: GPS SATELLITE SVN63 (PRN01) WILL BE UNUSABLE ON JDAY 294
(21 OCT 2022) BEGINNING 1730 ZULU UNTIL JDAY 294 (21 OCT 2022)
ENDING 2130 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022077
SUBJ: SVN73 (PRN10) FORECAST OUTAGE JDAY 294/1350 - JDAY 294/1700
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022077
NANU DTG: 141908Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 73
PRN: 10
START JDAY: 294
START TIME ZULU: 1350
START CALENDAR DATE: 21 OCT 2022
STOP JDAY: 294
STOP TIME ZULU: 1700
STOP CALENDAR DATE: 21 OCT 2022

2. CONDITION: GPS SATELLITE SVN73 (PRN10) WILL BE UNUSABLE ON JDAY 294
(21 OCT 2022) BEGINNING 1350 ZULU UNTIL JDAY 294 (21 OCT 2022)
ENDING 1700 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022076
SUBJ: SVN72 (PRN08) FORECAST OUTAGE JDAY 294/0000 - JDAY 294/0400
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022076
NANU DTG: 141904Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 72
PRN: 08
START JDAY: 294
START TIME ZULU: 0000
START CALENDAR DATE: 21 OCT 2022
STOP JDAY: 294
STOP TIME ZULU: 0400
STOP CALENDAR DATE: 21 OCT 2022

2. CONDITION: GPS SATELLITE SVN72 (PRN08) WILL BE UNUSABLE ON JDAY 294
(21 OCT 2022) BEGINNING 0000 ZULU UNTIL JDAY 294 (21 OCT 2022)
ENDING 0400 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022075
SUBJ: SVN71 (PRN26) FORECAST OUTAGE JDAY 293/2000 - JDAY 294/0000
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022075
NANU DTG: 141857Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 71
PRN: 26
START JDAY: 293
START TIME ZULU: 2000
START CALENDAR DATE: 20 OCT 2022
STOP JDAY: 294
STOP TIME ZULU: 0000
STOP CALENDAR DATE: 21 OCT 2022

2. CONDITION: GPS SATELLITE SVN71 (PRN26) WILL BE UNUSABLE ON JDAY 293
(20 OCT 2022) BEGINNING 2000 ZULU UNTIL JDAY 294 (21 OCT 2022)
ENDING 0000 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022074
SUBJ: SVN66 (PRN27) FORECAST OUTAGE JDAY 292/2230 - JDAY 293/0300
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022074
NANU DTG: 141657Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 66
PRN: 27
START JDAY: 292
START TIME ZULU: 2230
START CALENDAR DATE: 19 OCT 2022
STOP JDAY: 293
STOP TIME ZULU: 0300
STOP CALENDAR DATE: 20 OCT 2022

2. CONDITION: GPS SATELLITE SVN66 (PRN27) WILL BE UNUSABLE ON JDAY 292
(19 OCT 2022) BEGINNING 2230 ZULU UNTIL JDAY 293 (20 OCT 2022)
ENDING 0300 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022073
SUBJ: SVN69 (PRN03) FORECAST OUTAGE JDAY 292/1900 - JDAY 292/2300
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022073
NANU DTG: 141640Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 69
PRN: 03
START JDAY: 292
START TIME ZULU: 1900
START CALENDAR DATE: 19 OCT 2022
STOP JDAY: 292
STOP TIME ZULU: 2300
STOP CALENDAR DATE: 19 OCT 2022

2. CONDITION: GPS SATELLITE SVN69 (PRN03) WILL BE UNUSABLE ON JDAY 292
(19 OCT 2022) BEGINNING 1900 ZULU UNTIL JDAY 292 (19 OCT 2022)
ENDING 2300 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022072
SUBJ: SVN68 (PRN09) FORECAST OUTAGE JDAY 291/2200 - JDAY 292/0100
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022072
NANU DTG: 141634Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 68
PRN: 09
START JDAY: 291
START TIME ZULU: 2200
START CALENDAR DATE: 18 OCT 2022
STOP JDAY: 292
STOP TIME ZULU: 0100
STOP CALENDAR DATE: 19 OCT 2022

2. CONDITION: GPS SATELLITE SVN68 (PRN09) WILL BE UNUSABLE ON JDAY 291
(18 OCT 2022) BEGINNING 2200 ZULU UNTIL JDAY 292 (19 OCT 2022)
ENDING 0100 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022071
SUBJ: SVN65 (PRN24) FORECAST OUTAGE JDAY 291/1430 - JDAY 291/2000
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022071
NANU DTG: 141627Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 65
PRN: 24
START JDAY: 291
START TIME ZULU: 1430
START CALENDAR DATE: 18 OCT 2022
STOP JDAY: 291
STOP TIME ZULU: 2000
STOP CALENDAR DATE: 18 OCT 2022

2. CONDITION: GPS SATELLITE SVN65 (PRN24) WILL BE UNUSABLE ON JDAY 291
(18 OCT 2022) BEGINNING 1430 ZULU UNTIL JDAY 291 (18 OCT 2022)
ENDING 2000 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


13 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022070
SUBJ: SVN70 (PRN32) FORECAST OUTAGE CANCELED
1. NANU TYPE: FCSTCANC
NANU NUMBER: 2022070
NANU DTG: 132110Z OCT 2022
REFERENCE NANU: 2022065
REF NANU DTG: 092128Z OCT 2022
SVN: 70
PRN: 32
START JDAY: 287
START TIME ZULU: 1430
START CALENDAR DATE: 14 OCT 2022
STOP JDAY: CANCELLED
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVN70 (PRN32) SCHEDULED FOR
JDAY 287 (14 OCT 2022) BEGINNING 1430 ZULU HAS BEEN CANCELED.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


13 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022069
SUBJ: SVN70 (PRN32) FORECAST OUTAGE SUMMARY JDAY 286/1523 - JDAY 286/2057
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022069
NANU DTG: 132105Z OCT 2022
REFERENCE NANU: 2022068
REF NANU DTG: 132006Z OCT 2022
SVN: 70
PRN: 32
START JDAY: 286
START TIME ZULU: 1523
START CALENDAR DATE: 13 OCT 2022
STOP JDAY: 286
STOP TIME ZULU: 2057
STOP CALENDAR DATE: 13 OCT 2022

2. CONDITION: GPS SATELLITE SVN70 (PRN32) WAS UNUSABLE ON JDAY 286
(13 OCT 2022) BEGINNING 1523 ZULU UNTIL JDAY 286 (13 OCT 2022)
ENDING 2057 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


13 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022068
SUBJ: SVN70 (PRN32) FORECAST OUTAGE EXTENDED UNTIL FURTHER NOTICE
1. NANU TYPE: FCSTEXTD
NANU NUMBER: 2022068
NANU DTG: 132006Z OCT 2022
REFERENCE NANU: 2022064
REF NANU DTG: 092112Z OCT 2022
SVN: 70
PRN: 32
START JDAY: 286
START TIME ZULU: 1430
START CALENDAR DATE: 13 OCT 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVN70 (PRN32) IS EXTENDED
UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


12 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022067
SUBJ: SVN62 (PRN25) FORECAST OUTAGE SUMMARY JDAY 285/0802 - JDAY 285/1238
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022067
NANU DTG: 121252Z OCT 2022
REFERENCE NANU: 2022063
REF NANU DTG: 092012Z OCT 2022
SVN: 62
PRN: 25
START JDAY: 285
START TIME ZULU: 0802
START CALENDAR DATE: 12 OCT 2022
STOP JDAY: 285
STOP TIME ZULU: 1238
STOP CALENDAR DATE: 12 OCT 2022

2. CONDITION: GPS SATELLITE SVN62 (PRN25) WAS UNUSABLE ON JDAY 285
(12 OCT 2022) BEGINNING 0802 ZULU UNTIL JDAY 285 (12 OCT 2022)
ENDING 1238 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


11 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022066
SUBJ: SVN62 (PRN25) FORECAST OUTAGE SUMMARY JDAY 284/0809 - JDAY 284/1309
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022066
NANU DTG: 111335Z OCT 2022
REFERENCE NANU: 2022062
REF NANU DTG: 091953Z OCT 2022
SVN: 62
PRN: 25
START JDAY: 284
START TIME ZULU: 0809
START CALENDAR DATE: 11 OCT 2022
STOP JDAY: 284
STOP TIME ZULU: 1309
STOP CALENDAR DATE: 11 OCT 2022

2. CONDITION: GPS SATELLITE SVN62 (PRN25) WAS UNUSABLE ON JDAY 284
(11 OCT 2022) BEGINNING 0809 ZULU UNTIL JDAY 284 (11 OCT 2022)
ENDING 1309 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


10 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022065
SUBJ: SVN70 (PRN32) FORECAST OUTAGE JDAY 287/1430 - JDAY 287/2030
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022065
NANU DTG: 092128Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 70
PRN: 32
START JDAY: 287
START TIME ZULU: 1430
START CALENDAR DATE: 14 OCT 2022
STOP JDAY: 287
STOP TIME ZULU: 2030
STOP CALENDAR DATE: 14 OCT 2022

2. CONDITION: GPS SATELLITE SVN70 (PRN32) WILL BE UNUSABLE ON JDAY 287
(14 OCT 2022) BEGINNING 1430 ZULU UNTIL JDAY 287 (14 OCT 2022)
ENDING 2030 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


09 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022064
SUBJ: SVN70 (PRN32) FORECAST OUTAGE JDAY 286/1430 - JDAY 286/2030
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022064
NANU DTG: 092112Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 70
PRN: 32
START JDAY: 286
START TIME ZULU: 1430
START CALENDAR DATE: 13 OCT 2022
STOP JDAY: 286
STOP TIME ZULU: 2030
STOP CALENDAR DATE: 13 OCT 2022

2. CONDITION: GPS SATELLITE SVN70 (PRN32) WILL BE UNUSABLE ON JDAY 286
(13 OCT 2022) BEGINNING 1430 ZULU UNTIL JDAY 286 (13 OCT 2022)
ENDING 2030 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


09 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022063
SUBJ: SVN62 (PRN25) FORECAST OUTAGE JDAY 285/0730 - JDAY 285/1400
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022063
NANU DTG: 092012Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 62
PRN: 25
START JDAY: 285
START TIME ZULU: 0730
START CALENDAR DATE: 12 OCT 2022
STOP JDAY: 285
STOP TIME ZULU: 1400
STOP CALENDAR DATE: 12 OCT 2022

2. CONDITION: GPS SATELLITE SVN62 (PRN25) WILL BE UNUSABLE ON JDAY 285
(12 OCT 2022) BEGINNING 0730 ZULU UNTIL JDAY 285 (12 OCT 2022)
ENDING 1400 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


09 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022062
SUBJ: SVN62 (PRN25) FORECAST OUTAGE JDAY 284/0730 - JDAY 284/1400
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022062
NANU DTG: 091953Z OCT 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 62
PRN: 25
START JDAY: 284
START TIME ZULU: 0730
START CALENDAR DATE: 11 OCT 2022
STOP JDAY: 284
STOP TIME ZULU: 1400
STOP CALENDAR DATE: 11 OCT 2022

2. CONDITION: GPS SATELLITE SVN62 (PRN25) WILL BE UNUSABLE ON JDAY 284
(11 OCT 2022) BEGINNING 0730 ZULU UNTIL JDAY 284 (11 OCT 2022)
ENDING 1400 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


06 Oct 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022061
SUBJ: SVN69 (PRN03) FORECAST OUTAGE SUMMARY JDAY 279/1428 - JDAY 279/2019
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022061
NANU DTG: 062032Z OCT 2022
REFERENCE NANU: 2022060
REF NANU DTG: 301616Z SEP 2022
SVN: 69
PRN: 03
START JDAY: 279
START TIME ZULU: 1428
START CALENDAR DATE: 06 OCT 2022
STOP JDAY: 279
STOP TIME ZULU: 2019
STOP CALENDAR DATE: 06 OCT 2022

2. CONDITION: GPS SATELLITE SVN69 (PRN03) WAS UNUSABLE ON JDAY 279
(06 OCT 2022) BEGINNING 1428 ZULU UNTIL JDAY 279 (06 OCT 2022)
ENDING 2019 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


30 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022060
SUBJ: SVN69 (PRN03) FORECAST OUTAGE JDAY 279/1425 - JDAY 280/0225
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022060
NANU DTG: 301616Z SEP 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 69
PRN: 03
START JDAY: 279
START TIME ZULU: 1425
START CALENDAR DATE: 06 OCT 2022
STOP JDAY: 280
STOP TIME ZULU: 0225
STOP CALENDAR DATE: 07 OCT 2022

2. CONDITION: GPS SATELLITE SVN69 (PRN03) WILL BE UNUSABLE ON JDAY 279
(06 OCT 2022) BEGINNING 1425 ZULU UNTIL JDAY 280 (07 OCT 2022)
ENDING 0225 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


29 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022059
SUBJ: SVN50 (PRN05) FORECAST OUTAGE SUMMARY JDAY 272/2300 - JDAY 273/0420
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022059
NANU DTG: 300424Z SEP 2022
REFERENCE NANU: 2022058
REF NANU DTG: 232227Z SEP 2022
SVN: 50
PRN: 05
START JDAY: 272
START TIME ZULU: 2300
START CALENDAR DATE: 29 SEP 2022
STOP JDAY: 273
STOP TIME ZULU: 0420
STOP CALENDAR DATE: 30 SEP 2022

2. CONDITION: GPS SATELLITE SVN50 (PRN05) WAS UNUSABLE ON JDAY 272
(29 SEP 2022) BEGINNING 2300 ZULU UNTIL JDAY 273 (30 SEP 2022)
ENDING 0420 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


23 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022058
SUBJ: SVN50 (PRN05) FORECAST OUTAGE JDAY 272/2230 - JDAY 273/1030
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022058
NANU DTG: 232227Z SEP 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 50
PRN: 05
START JDAY: 272
START TIME ZULU: 2230
START CALENDAR DATE: 29 SEP 2022
STOP JDAY: 273
STOP TIME ZULU: 1030
STOP CALENDAR DATE: 30 SEP 2022

2. CONDITION: GPS SATELLITE SVN50 (PRN05) WILL BE UNUSABLE ON JDAY 272
(29 SEP 2022) BEGINNING 2230 ZULU UNTIL JDAY 273 (30 SEP 2022)
ENDING 1030 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


22 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022057
SUBJ: SVN67 (PRN06) FORECAST OUTAGE SUMMARY JDAY 265/1501 - JDAY 265/2041
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022057
NANU DTG: 222049Z SEP 2022
REFERENCE NANU: 2022056
REF NANU DTG: 192206Z SEP 2022
SVN: 67
PRN: 06
START JDAY: 265
START TIME ZULU: 1501
START CALENDAR DATE: 22 SEP 2022
STOP JDAY: 265
STOP TIME ZULU: 2041
STOP CALENDAR DATE: 22 SEP 2022

2. CONDITION: GPS SATELLITE SVN67 (PRN06) WAS UNUSABLE ON JDAY 265
(22 SEP 2022) BEGINNING 1501 ZULU UNTIL JDAY 265 (22 SEP 2022)
ENDING 2041 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022056
SUBJ: SVN67 (PRN06) FORECAST OUTAGE JDAY 265/1445 - JDAY 266/0245
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022056
NANU DTG: 192206Z SEP 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 67
PRN: 06
START JDAY: 265
START TIME ZULU: 1445
START CALENDAR DATE: 22 SEP 2022
STOP JDAY: 266
STOP TIME ZULU: 0245
STOP CALENDAR DATE: 23 SEP 2022

2. CONDITION: GPS SATELLITE SVN67 (PRN06) WILL BE UNUSABLE ON JDAY 265
(22 SEP 2022) BEGINNING 1445 ZULU UNTIL JDAY 266 (23 SEP 2022)
ENDING 0245 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


16 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022055
SUBJ: SVN76 (PRN23) UNUSABLE JDAY 251/0651 - JDAY 259/1528
1. NANU TYPE: UNUSABLE
NANU NUMBER: 2022055
NANU DTG: 161529Z SEP 2022
REFERENCE NANU: 2022047
REF NANU DTG: 080706Z SEP 2022
SVN: 76
PRN: 23
START JDAY: 251
START TIME ZULU: 0651
START CALENDAR DATE: 08 SEP 2022
STOP JDAY: 259
STOP TIME ZULU: 1528
STOP CALENDAR DATE: 16 SEP 2022

2. CONDITION: GPS SATELLITE SVN76 (PRN23) WAS UNUSABLE ON JDAY 251
(08 SEP 2022) BEGINNING 0651 ZULU UNTIL JDAY 259 (16 SEP 2022)
ENDING 1528 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


16 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022054 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
NANU 2022053 Outage Stop Time Incorrect, Outage Ongoing. UNUSABLE to Follow. NANU 2022053 is to be Disregarded.
*** GENERAL MESSAGE TO ALL GPS USERS ***

POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


16 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022053
SUBJ: SVN76 (PRN23) UNUSABLE JDAY 251/0651 - JDAY 259/1454
1. NANU TYPE: UNUSABLE
NANU NUMBER: 2022053
NANU DTG: 161502Z SEP 2022
REFERENCE NANU: 2022047
REF NANU DTG: 080706Z SEP 2022
SVN: 76
PRN: 23
START JDAY: 251
START TIME ZULU: 0651
START CALENDAR DATE: 08 SEP 2022
STOP JDAY: 259
STOP TIME ZULU: 1454
STOP CALENDAR DATE: 16 SEP 2022

2. CONDITION: GPS SATELLITE SVN76 (PRN23) WAS UNUSABLE ON JDAY 251
(08 SEP 2022) BEGINNING 0651 ZULU UNTIL JDAY 259 (16 SEP 2022)
ENDING 1454 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


15 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022052
SUBJ: SVN67 (PRN06) FORECAST OUTAGE CANCELED
1. NANU TYPE: FCSTCANC
NANU NUMBER: 2022052
NANU DTG: 151543Z SEP 2022
REFERENCE NANU: 2022049
REF NANU DTG: 081911Z SEP 2022
SVN: 67
PRN: 06
START JDAY: 258
START TIME ZULU: 1500
START CALENDAR DATE: 15 SEP 2022
STOP JDAY: CANCELLED
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVN67 (PRN06) SCHEDULED FOR
JDAY 258 (15 SEP 2022) BEGINNING 1500 ZULU HAS BEEN CANCELED.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022051
SUBJ: SVN64 (PRN30) UNUSABLE JDAY 257/2003 - JDAY 257/2233
1. NANU TYPE: UNUSABLE
NANU NUMBER: 2022051
NANU DTG: 142230Z SEP 2022
REFERENCE NANU: 2022050
REF NANU DTG: 142010Z SEP 2022
SVN: 64
PRN: 30
START JDAY: 257
START TIME ZULU: 2003
START CALENDAR DATE: 14 SEP 2022
STOP JDAY: 257
STOP TIME ZULU: 2233
STOP CALENDAR DATE: 14 SEP 2022

2. CONDITION: GPS SATELLITE SVN64 (PRN30) WAS UNUSABLE ON JDAY 257
(14 SEP 2022) BEGINNING 2003 ZULU UNTIL JDAY 257 (14 SEP 2022)
ENDING 2233 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022050
SUBJ: SVN64 (PRN30) UNUSABLE JDAY 257/2003 - UNTIL FURTHER NOTICE
1. NANU TYPE: UNUSUFN
NANU NUMBER: 2022050
NANU DTG: 142010Z SEP 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 64
PRN: 30
START JDAY: 257
START TIME ZULU: 2003
START CALENDAR DATE: 14 SEP 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN64 (PRN30) WAS UNUSABLE ON JDAY 257
(14 SEP 2022) BEGINNING 2003 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


08 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022049
SUBJ: SVN67 (PRN06) FORECAST OUTAGE JDAY 258/1500 - JDAY 259/0300
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022049
NANU DTG: 081911Z SEP 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 67
PRN: 06
START JDAY: 258
START TIME ZULU: 1500
START CALENDAR DATE: 15 SEP 2022
STOP JDAY: 259
STOP TIME ZULU: 0300
STOP CALENDAR DATE: 16 SEP 2022

2. CONDITION: GPS SATELLITE SVN67 (PRN06) WILL BE UNUSABLE ON JDAY 258
(15 SEP 2022) BEGINNING 1500 ZULU UNTIL JDAY 259 (16 SEP 2022)
ENDING 0300 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


08 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022048
SUBJ: SVN71 (PRN26) FORECAST OUTAGE SUMMARY JDAY 251/1229 - JDAY 251/1757
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022048
NANU DTG: 081810Z SEP 2022
REFERENCE NANU: 2022046
REF NANU DTG: 311513Z AUG 2022
SVN: 71
PRN: 26
START JDAY: 251
START TIME ZULU: 1229
START CALENDAR DATE: 08 SEP 2022
STOP JDAY: 251
STOP TIME ZULU: 1757
STOP CALENDAR DATE: 08 SEP 2022

2. CONDITION: GPS SATELLITE SVN71 (PRN26) WAS UNUSABLE ON JDAY 251
(08 SEP 2022) BEGINNING 1229 ZULU UNTIL JDAY 251 (08 SEP 2022)
ENDING 1757 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


08 Sep 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022047
SUBJ: SVN76 (PRN23) UNUSABLE JDAY 251/0651 - UNTIL FURTHER NOTICE
1. NANU TYPE: UNUSUFN
NANU NUMBER: 2022047
NANU DTG: 080706Z SEP 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 76
PRN: 23
START JDAY: 251
START TIME ZULU: 0651
START CALENDAR DATE: 08 SEP 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN76 (PRN23) WAS UNUSABLE ON JDAY 251
(08 SEP 2022) BEGINNING 0651 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


31 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022046
SUBJ: SVN71 (PRN26) FORECAST OUTAGE JDAY 251/1215 - JDAY 252/0015
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022046
NANU DTG: 311513Z AUG 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 71
PRN: 26
START JDAY: 251
START TIME ZULU: 1215
START CALENDAR DATE: 08 SEP 2022
STOP JDAY: 252
STOP TIME ZULU: 0015
STOP CALENDAR DATE: 09 SEP 2022

2. CONDITION: GPS SATELLITE SVN71 (PRN26) WILL BE UNUSABLE ON JDAY 251
(08 SEP 2022) BEGINNING 1215 ZULU UNTIL JDAY 252 (09 SEP 2022)
ENDING 0015 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


29 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022045
SUBJ: SVN73 (PRN10) FORECAST OUTAGE SUMMARY JDAY 235/1303 - JDAY 241/1849
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022045
NANU DTG: 291854Z AUG 2022
REFERENCE NANU: 2022039
REF NANU DTG: 181426Z AUG 2022
SVN: 73
PRN: 10
START JDAY: 235
START TIME ZULU: 1303
START CALENDAR DATE: 23 AUG 2022
STOP JDAY: 241
STOP TIME ZULU: 1849
STOP CALENDAR DATE: 29 AUG 2022

2. CONDITION: GPS SATELLITE SVN73 (PRN10) WAS UNUSABLE ON JDAY 235
(23 AUG 2022) BEGINNING 1303 ZULU UNTIL JDAY 241 (29 AUG 2022)
ENDING 1849 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022044
SUBJ: SVN62 (PRN25) UNUSABLE JDAY 231/1456 - JDAY 231/1723
1. NANU TYPE: UNUSABLE
NANU NUMBER: 2022044
NANU DTG: 191735Z AUG 2022
REFERENCE NANU: 2022041
REF NANU DTG: 191533Z AUG 2022
SVN: 62
PRN: 25
START JDAY: 231
START TIME ZULU: 1456
START CALENDAR DATE: 19 AUG 2022
STOP JDAY: 231
STOP TIME ZULU: 1723
STOP CALENDAR DATE: 19 AUG 2022

2. CONDITION: GPS SATELLITE SVN62 (PRN25) WAS UNUSABLE ON JDAY 231
(19 AUG 2022) BEGINNING 1456 ZULU UNTIL JDAY 231 (19 AUG 2022)
ENDING 1723 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022043
SUBJ: SVN62 (PRN25) FORECAST OUTAGE CANCELED
1. NANU TYPE: FCSTCANC
NANU NUMBER: 2022043
NANU DTG: 191709Z AUG 2022
REFERENCE NANU: 2022040
REF NANU DTG: 191527Z AUG 2022
SVN: 62
PRN: 25
START JDAY: 231
START TIME ZULU: 1456
START CALENDAR DATE: 19 AUG 2022
STOP JDAY: CANCELLED
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: THE FORECAST OUTAGE FOR GPS SATELLITE SVN62 (PRN25) SCHEDULED FOR
JDAY 231 (19 AUG 2022) BEGINNING 1456 ZULU HAS BEEN CANCELED.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022042 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
NANU 2022040 Labelled Incorrectly. NANU 2022041 Reflects Correct Label.
*** GENERAL MESSAGE TO ALL GPS USERS ***

POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022041
SUBJ: SVN62 (PRN25) UNUSABLE JDAY 231/1456 - UNTIL FURTHER NOTICE
1. NANU TYPE: UNUSUFN
NANU NUMBER: 2022041
NANU DTG: 191533Z AUG 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 62
PRN: 25
START JDAY: 231
START TIME ZULU: 1456
START CALENDAR DATE: 19 AUG 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN62 (PRN25) WAS UNUSABLE ON JDAY 231
(19 AUG 2022) BEGINNING 1456 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022040
SUBJ: SVN62 (PRN25) FORECAST OUTAGE JDAY 231/1456 - UNTIL FURTHER NOTICE
1. NANU TYPE: FCSTUUFN
NANU NUMBER: 2022040
NANU DTG: 191527Z AUG 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 62
PRN: 25
START JDAY: 231
START TIME ZULU: 1456
START CALENDAR DATE: 19 AUG 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN62 (PRN25) WILL BE UNUSABLE NO EARLIER THAN JDAY 231
(19 AUG 2022) BEGINNING 1456 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


18 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022039
SUBJ: SVN73 (PRN10) FORECAST OUTAGE JDAY 235/1300 - JDAY 245/1300
1. NANU TYPE: FCSTMX
NANU NUMBER: 2022039
NANU DTG: 181426Z AUG 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 73
PRN: 10
START JDAY: 235
START TIME ZULU: 1300
START CALENDAR DATE: 23 AUG 2022
STOP JDAY: 245
STOP TIME ZULU: 1300
STOP CALENDAR DATE: 02 SEP 2022

2. CONDITION: GPS SATELLITE SVN73 (PRN10) WILL BE UNUSABLE ON JDAY 235
(23 AUG 2022) BEGINNING 1300 ZULU UNTIL JDAY 245 (02 SEP 2022)
ENDING 1300 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


11 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022038
SUBJ: SVN52 (PRN31) FORECAST OUTAGE SUMMARY JDAY 223/2239 - JDAY 224/0428
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022038
NANU DTG: 120443Z AUG 2022
REFERENCE NANU: 2022037
REF NANU DTG: 041500Z AUG 2022
SVN: 52
PRN: 31
START JDAY: 223
START TIME ZULU: 2239
START CALENDAR DATE: 11 AUG 2022
STOP JDAY: 224
STOP TIME ZULU: 0428
STOP CALENDAR DATE: 12 AUG 2022

2. CONDITION: GPS SATELLITE SVN52 (PRN31) WAS UNUSABLE ON JDAY 223
(11 AUG 2022) BEGINNING 2239 ZULU UNTIL JDAY 224 (12 AUG 2022)
ENDING 0428 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Aug 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022037
SUBJ: SVN52 (PRN31) FORECAST OUTAGE JDAY 223/2215 - JDAY 224/1015
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022037
NANU DTG: 041500Z AUG 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 52
PRN: 31
START JDAY: 223
START TIME ZULU: 2215
START CALENDAR DATE: 11 AUG 2022
STOP JDAY: 224
STOP TIME ZULU: 1015
STOP CALENDAR DATE: 12 AUG 2022

2. CONDITION: GPS SATELLITE SVN52 (PRN31) WILL BE UNUSABLE ON JDAY 223
(11 AUG 2022) BEGINNING 2215 ZULU UNTIL JDAY 224 (12 AUG 2022)
ENDING 1015 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


29 Jul 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022036
SUBJ: SVN74 (PRN04) FORECAST OUTAGE SUMMARY JDAY 210/0227 - JDAY 210/0733
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022036
NANU DTG: 290720Z JUL 2022
REFERENCE NANU: 2022035
REF NANU DTG: 211445Z JUL 2022
SVN: 74
PRN: 04
START JDAY: 210
START TIME ZULU: 0227
START CALENDAR DATE: 29 JUL 2022
STOP JDAY: 210
STOP TIME ZULU: 0733
STOP CALENDAR DATE: 29 JUL 2022

2. CONDITION: GPS SATELLITE SVN74 (PRN04) WAS UNUSABLE ON JDAY 210
(29 JUL 2022) BEGINNING 0227 ZULU UNTIL JDAY 210 (29 JUL 2022)
ENDING 0733 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


21 Jul 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022035
SUBJ: SVN74 (PRN04) FORECAST OUTAGE JDAY 210/0200 - JDAY 210/1400
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022035
NANU DTG: 211445Z JUL 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 74
PRN: 04
START JDAY: 210
START TIME ZULU: 0200
START CALENDAR DATE: 29 JUL 2022
STOP JDAY: 210
STOP TIME ZULU: 1400
STOP CALENDAR DATE: 29 JUL 2022

2. CONDITION: GPS SATELLITE SVN74 (PRN04) WILL BE UNUSABLE ON JDAY 210
(29 JUL 2022) BEGINNING 0200 ZULU UNTIL JDAY 210 (29 JUL 2022)
ENDING 1400 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Jul 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022034
SUBJ: SVN61 (PRN02) FORECAST OUTAGE SUMMARY JDAY 195/1524 - JDAY 195/2216
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022034
NANU DTG: 142217Z JUL 2022
REFERENCE NANU: 2022033
REF NANU DTG: 071653Z JUL 2022
SVN: 61
PRN: 02
START JDAY: 195
START TIME ZULU: 1524
START CALENDAR DATE: 14 JUL 2022
STOP JDAY: 195
STOP TIME ZULU: 2216
STOP CALENDAR DATE: 14 JUL 2022

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WAS UNUSABLE ON JDAY 195
(14 JUL 2022) BEGINNING 1524 ZULU UNTIL JDAY 195 (14 JUL 2022)
ENDING 2216 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


07 Jul 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022033
SUBJ: SVN61 (PRN02) FORECAST OUTAGE JDAY 195/1425 - JDAY 196/1425
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022033
NANU DTG: 071653Z JUL 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 61
PRN: 02
START JDAY: 195
START TIME ZULU: 1425
START CALENDAR DATE: 14 JUL 2022
STOP JDAY: 196
STOP TIME ZULU: 1425
STOP CALENDAR DATE: 15 JUL 2022

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WILL BE UNUSABLE ON JDAY 195
(14 JUL 2022) BEGINNING 1425 ZULU UNTIL JDAY 196 (15 JUL 2022)
ENDING 1425 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


30 Jun 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022032
SUBJ: SVN72 (PRN08) FORECAST OUTAGE SUMMARY JDAY 181/0736 - JDAY 181/1431
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022032
NANU DTG: 301439Z JUN 2022
REFERENCE NANU: 2022031
REF NANU DTG: 251519Z JUN 2022
SVN: 72
PRN: 08
START JDAY: 181
START TIME ZULU: 0736
START CALENDAR DATE: 30 JUN 2022
STOP JDAY: 181
STOP TIME ZULU: 1431
STOP CALENDAR DATE: 30 JUN 2022

2. CONDITION: GPS SATELLITE SVN72 (PRN08) WAS UNUSABLE ON JDAY 181
(30 JUN 2022) BEGINNING 0736 ZULU UNTIL JDAY 181 (30 JUN 2022)
ENDING 1431 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


25 Jun 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022031

SUBJ: SVN72 (PRN08) FORECAST OUTAGE JDAY 181/0730 - JDAY 181/1930

1. NANU TYPE: FCSTDV

NANU NUMBER: 2022031

NANU DTG: 251519Z JUN 2022

REFERENCE NANU: N/A

REF NANU DTG: N/A

SVN: 72

PRN: 08

START JDAY: 181

START TIME ZULU: 0730

START CALENDAR DATE: 30 JUN 2022

STOP JDAY: 181

STOP TIME ZULU: 1930

STOP CALENDAR DATE: 30 JUN 2022



2. CONDITION: GPS SATELLITE SVN72 (PRN08) WILL BE UNUSABLE ON JDAY 181

(30 JUN 2022) BEGINNING 0730 ZULU UNTIL JDAY 181 (30 JUN 2022)

ENDING 1930 ZULU.



3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV

MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,

COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL

MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.

JSPOCCOMBATOPS@US.AF.MIL


24 Jun 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022030
SUBJ: SVN68 (PRN09) FORECAST OUTAGE SUMMARY JDAY 175/0815 - JDAY 175/1335
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022030
NANU DTG: 241407Z JUN 2022
REFERENCE NANU: 2022029
REF NANU DTG: 211417Z JUN 2022
SVN: 68
PRN: 09
START JDAY: 175
START TIME ZULU: 0815
START CALENDAR DATE: 24 JUN 2022
STOP JDAY: 175
STOP TIME ZULU: 1335
STOP CALENDAR DATE: 24 JUN 2022

2. CONDITION: GPS SATELLITE SVN68 (PRN09) WAS UNUSABLE ON JDAY 175
(24 JUN 2022) BEGINNING 0815 ZULU UNTIL JDAY 175 (24 JUN 2022)
ENDING 1335 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


21 Jun 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022029
SUBJ: SVN68 (PRN09) FORECAST OUTAGE JDAY 175/0745 - JDAY 175/1945
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022029
NANU DTG: 211417Z JUN 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 68
PRN: 09
START JDAY: 175
START TIME ZULU: 0745
START CALENDAR DATE: 24 JUN 2022
STOP JDAY: 175
STOP TIME ZULU: 1945
STOP CALENDAR DATE: 24 JUN 2022

2. CONDITION: GPS SATELLITE SVN68 (PRN09) WILL BE UNUSABLE ON JDAY 175
(24 JUN 2022) BEGINNING 0745 ZULU UNTIL JDAY 175 (24 JUN 2022)
ENDING 1945 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


07 Jun 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022028
SUBJ: SVN55 (PRN15) FORECAST OUTAGE SUMMARY JDAY 158/1317 - JDAY 158/2044
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022028
NANU DTG: 072119Z JUN 2022
REFERENCE NANU: 2022027
REF NANU DTG: 012111Z JUN 2022
SVN: 55
PRN: 15
START JDAY: 158
START TIME ZULU: 1317
START CALENDAR DATE: 07 JUN 2022
STOP JDAY: 158
STOP TIME ZULU: 2044
STOP CALENDAR DATE: 07 JUN 2022

2. CONDITION: GPS SATELLITE SVN55 (PRN15) WAS UNUSABLE ON JDAY 158
(07 JUN 2022) BEGINNING 1317 ZULU UNTIL JDAY 158 (07 JUN 2022)
ENDING 2044 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


01 Jun 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022027
SUBJ: SVN55 (PRN15) FORECAST OUTAGE JDAY 158/1215 - JDAY 159/0015
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022027
NANU DTG: 012111Z JUN 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 55
PRN: 15
START JDAY: 158
START TIME ZULU: 1215
START CALENDAR DATE: 07 JUN 2022
STOP JDAY: 159
STOP TIME ZULU: 0015
STOP CALENDAR DATE: 08 JUN 2022

2. CONDITION: GPS SATELLITE SVN55 (PRN15) WILL BE UNUSABLE ON JDAY 158
(07 JUN 2022) BEGINNING 1215 ZULU UNTIL JDAY 159 (08 JUN 2022)
ENDING 0015 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


26 May 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022026
SUBJ: SVN58 (PRN12) FORECAST OUTAGE SUMMARY JDAY 146/1726 - JDAY 147/0007
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022026
NANU DTG: 270025Z MAY 2022
REFERENCE NANU: 2022024
REF NANU DTG: 231423Z MAY 2022
SVN: 58
PRN: 12
START JDAY: 146
START TIME ZULU: 1726
START CALENDAR DATE: 26 MAY 2022
STOP JDAY: 147
STOP TIME ZULU: 0007
STOP CALENDAR DATE: 27 MAY 2022

2. CONDITION: GPS SATELLITE SVN58 (PRN12) WAS UNUSABLE ON JDAY 146
(26 MAY 2022) BEGINNING 1726 ZULU UNTIL JDAY 147 (27 MAY 2022)
ENDING 0007 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


25 May 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022025
SUBJ: SVN78 (PRN11) USABLE JDAY 145/1712
1. NANU TYPE: USABINIT
NANU NUMBER: 2022025
NANU DTG: 251712Z MAY 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 78
PRN: 11
START JDAY: 145
START TIME ZULU: 1712
START CALENDAR DATE: 25 MAY 2022
STOP JDAY: N/A
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN78 (PRN11) WAS USABLE AS OF JDAY 145
(25 MAY 2022) BEGINNING 1712 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


23 May 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022024
SUBJ: SVN58 (PRN12) FORECAST OUTAGE JDAY 146/1715 - JDAY 147/0515
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022024
NANU DTG: 231423Z MAY 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 58
PRN: 12
START JDAY: 146
START TIME ZULU: 1715
START CALENDAR DATE: 26 MAY 2022
STOP JDAY: 147
STOP TIME ZULU: 0515
STOP CALENDAR DATE: 27 MAY 2022

2. CONDITION: GPS SATELLITE SVN58 (PRN12) WILL BE UNUSABLE ON JDAY 146
(26 MAY 2022) BEGINNING 1715 ZULU UNTIL JDAY 147 (27 MAY 2022)
ENDING 0515 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 May 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022023
SUBJ: SVN75 (PRN18) FORECAST OUTAGE SUMMARY JDAY 139/2019 - JDAY 140/0203
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022023
NANU DTG: 200206Z MAY 2022
REFERENCE NANU: 2022022
REF NANU DTG: 121459Z MAY 2022
SVN: 75
PRN: 18
START JDAY: 139
START TIME ZULU: 2019
START CALENDAR DATE: 19 MAY 2022
STOP JDAY: 140
STOP TIME ZULU: 0203
STOP CALENDAR DATE: 20 MAY 2022

2. CONDITION: GPS SATELLITE SVN75 (PRN18) WAS UNUSABLE ON JDAY 139
(19 MAY 2022) BEGINNING 2019 ZULU UNTIL JDAY 140 (20 MAY 2022)
ENDING 0203 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


12 May 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022022
SUBJ: SVN75 (PRN18) FORECAST OUTAGE JDAY 139/2015 - JDAY 140/0815
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022022
NANU DTG: 121459Z MAY 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 75
PRN: 18
START JDAY: 139
START TIME ZULU: 2015
START CALENDAR DATE: 19 MAY 2022
STOP JDAY: 140
STOP TIME ZULU: 0815
STOP CALENDAR DATE: 20 MAY 2022

2. CONDITION: GPS SATELLITE SVN75 (PRN18) WILL BE UNUSABLE ON JDAY 139
(19 MAY 2022) BEGINNING 2015 ZULU UNTIL JDAY 140 (20 MAY 2022)
ENDING 0815 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


21 Apr 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022021
SUBJ: SVN53 (PRN17) FORECAST OUTAGE SUMMARY JDAY 111/1613 - JDAY 111/2114
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022021
NANU DTG: 212115Z APR 2022
REFERENCE NANU: 2022020
REF NANU DTG: 180245Z APR 2022
SVN: 53
PRN: 17
START JDAY: 111
START TIME ZULU: 1613
START CALENDAR DATE: 21 APR 2022
STOP JDAY: 111
STOP TIME ZULU: 2114
STOP CALENDAR DATE: 21 APR 2022

2. CONDITION: GPS SATELLITE SVN53 (PRN17) WAS UNUSABLE ON JDAY 111
(21 APR 2022) BEGINNING 1613 ZULU UNTIL JDAY 111 (21 APR 2022)
ENDING 2114 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


17 Apr 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022020
SUBJ: SVN53 (PRN17) FORECAST OUTAGE JDAY 111/1530 - JDAY 112/0330
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022020
NANU DTG: 180245Z APR 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 53
PRN: 17
START JDAY: 111
START TIME ZULU: 1530
START CALENDAR DATE: 21 APR 2022
STOP JDAY: 112
STOP TIME ZULU: 0330
STOP CALENDAR DATE: 22 APR 2022

2. CONDITION: GPS SATELLITE SVN53 (PRN17) WILL BE UNUSABLE ON JDAY 111
(21 APR 2022) BEGINNING 1530 ZULU UNTIL JDAY 112 (22 APR 2022)
ENDING 0330 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


08 Apr 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022019
SUBJ: SVN45 (PRN21) FORECAST OUTAGE SUMMARY JDAY 098/0315 - JDAY 098/1342
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022019
NANU DTG: 081349Z APR 2022
REFERENCE NANU: 2022018
REF NANU DTG: 041706Z APR 2022
SVN: 45
PRN: 21
START JDAY: 098
START TIME ZULU: 0315
START CALENDAR DATE: 08 APR 2022
STOP JDAY: 098
STOP TIME ZULU: 1342
STOP CALENDAR DATE: 08 APR 2022

2. CONDITION: GPS SATELLITE SVN45 (PRN21) WAS UNUSABLE ON JDAY 098
(08 APR 2022) BEGINNING 0315 ZULU UNTIL JDAY 098 (08 APR 2022)
ENDING 1342 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


04 Apr 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022018
SUBJ: SVN45 (PRN21) FORECAST OUTAGE JDAY 098/0315 - JDAY 098/1515
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022018
NANU DTG: 041706Z APR 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 45
PRN: 21
START JDAY: 098
START TIME ZULU: 0315
START CALENDAR DATE: 08 APR 2022
STOP JDAY: 098
STOP TIME ZULU: 1515
STOP CALENDAR DATE: 08 APR 2022

2. CONDITION: GPS SATELLITE SVN45 (PRN21) WILL BE UNUSABLE ON JDAY 098
(08 APR 2022) BEGINNING 0315 ZULU UNTIL JDAY 098 (08 APR 2022)
ENDING 1515 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022017
SUBJ: SVN77 (PRN14) UNUSABLE JDAY 087/0740 - JDAY 087/2035
1. NANU TYPE: UNUSABLE
NANU NUMBER: 2022017
NANU DTG: 282108Z MAR 2022
REFERENCE NANU: 2022014
REF NANU DTG: 280753Z MAR 2022
SVN: 77
PRN: 14
START JDAY: 087
START TIME ZULU: 0740
START CALENDAR DATE: 28 MAR 2022
STOP JDAY: 087
STOP TIME ZULU: 2035
STOP CALENDAR DATE: 28 MAR 2022

2. CONDITION: GPS SATELLITE SVN77 (PRN14) WAS UNUSABLE ON JDAY 087
(28 MAR 2022) BEGINNING 0740 ZULU UNTIL JDAY 087 (28 MAR 2022)
ENDING 2035 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022016 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
PLEASE DISREGARD NANU 2022015 DUE TO AN ERROR IN THE NAMING CONVENTION. OUTAGE START AND STOP TIMES REMAIN ACCURATE. THE CORRECT NANU WILL BE LABELED UNUSABLE.
*** GENERAL MESSAGE TO ALL GPS USERS ***

POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022015
SUBJ: SVN77 (PRN14) FORECAST OUTAGE SUMMARY JDAY 087/0740 - JDAY 087/2035
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022015
NANU DTG: 282035Z MAR 2022
REFERENCE NANU: 2022014
REF NANU DTG: 280753Z MAR 2022
SVN: 77
PRN: 14
START JDAY: 087
START TIME ZULU: 0740
START CALENDAR DATE: 28 MAR 2022
STOP JDAY: 087
STOP TIME ZULU: 2035
STOP CALENDAR DATE: 28 MAR 2022

2. CONDITION: GPS SATELLITE SVN77 (PRN14) WAS UNUSABLE ON JDAY 087
(28 MAR 2022) BEGINNING 0740 ZULU UNTIL JDAY 087 (28 MAR 2022)
ENDING 2035 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


28 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022014
SUBJ: SVN77 (PRN14) UNUSABLE JDAY 087/0740 - UNTIL FURTHER NOTICE
1. NANU TYPE: UNUSUFN
NANU NUMBER: 2022014
NANU DTG: 280753Z MAR 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 77
PRN: 14
START JDAY: 087
START TIME ZULU: 0740
START CALENDAR DATE: 28 MAR 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN77 (PRN14) WAS UNUSABLE ON JDAY 087
(28 MAR 2022) BEGINNING 0740 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


24 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022013
SUBJ: SVN51 (PRN20) FORECAST OUTAGE SUMMARY JDAY 083/1530 - JDAY 083/2324
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022013
NANU DTG: 242332Z MAR 2022
REFERENCE NANU: 2022011
REF NANU DTG: 171538Z MAR 2022
SVN: 51
PRN: 20
START JDAY: 083
START TIME ZULU: 1530
START CALENDAR DATE: 24 MAR 2022
STOP JDAY: 083
STOP TIME ZULU: 2324
STOP CALENDAR DATE: 24 MAR 2022

2. CONDITION: GPS SATELLITE SVN51 (PRN20) WAS UNUSABLE ON JDAY 083
(24 MAR 2022) BEGINNING 1530 ZULU UNTIL JDAY 083 (24 MAR 2022)
ENDING 2324 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


17 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022012
SUBJ: SVN64 (PRN30) FORECAST OUTAGE SUMMARY JDAY 076/1434 - JDAY 076/1920
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022012
NANU DTG: 171926Z MAR 2022
REFERENCE NANU: 2022009
REF NANU DTG: 102302Z MAR 2022
SVN: 64
PRN: 30
START JDAY: 076
START TIME ZULU: 1434
START CALENDAR DATE: 17 MAR 2022
STOP JDAY: 076
STOP TIME ZULU: 1920
STOP CALENDAR DATE: 17 MAR 2022

2. CONDITION: GPS SATELLITE SVN64 (PRN30) WAS UNUSABLE ON JDAY 076
(17 MAR 2022) BEGINNING 1434 ZULU UNTIL JDAY 076 (17 MAR 2022)
ENDING 1920 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


17 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022011
SUBJ: SVN51 (PRN20) FORECAST OUTAGE JDAY 083/1530 - JDAY 084/0330
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022011
NANU DTG: 171538Z MAR 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 51
PRN: 20
START JDAY: 083
START TIME ZULU: 1530
START CALENDAR DATE: 24 MAR 2022
STOP JDAY: 084
STOP TIME ZULU: 0330
STOP CALENDAR DATE: 25 MAR 2022

2. CONDITION: GPS SATELLITE SVN51 (PRN20) WILL BE UNUSABLE ON JDAY 083
(24 MAR 2022) BEGINNING 1530 ZULU UNTIL JDAY 084 (25 MAR 2022)
ENDING 0330 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


10 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022010
SUBJ: SVN61 (PRN02) FORECAST OUTAGE SUMMARY JDAY 069/2356 - JDAY 070/0418
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022010
NANU DTG: 110430Z MAR 2022
REFERENCE NANU: 2022008
REF NANU DTG: 032027Z MAR 2022
SVN: 61
PRN: 02
START JDAY: 069
START TIME ZULU: 2356
START CALENDAR DATE: 10 MAR 2022
STOP JDAY: 070
STOP TIME ZULU: 0418
STOP CALENDAR DATE: 11 MAR 2022

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WAS UNUSABLE ON JDAY 069
(10 MAR 2022) BEGINNING 2356 ZULU UNTIL JDAY 070 (11 MAR 2022)
ENDING 0418 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


10 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022009
SUBJ: SVN64 (PRN30) FORECAST OUTAGE JDAY 076/1430 - JDAY 077/0230
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022009
NANU DTG: 102302Z MAR 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 64
PRN: 30
START JDAY: 076
START TIME ZULU: 1430
START CALENDAR DATE: 17 MAR 2022
STOP JDAY: 077
STOP TIME ZULU: 0230
STOP CALENDAR DATE: 18 MAR 2022

2. CONDITION: GPS SATELLITE SVN64 (PRN30) WILL BE UNUSABLE ON JDAY 076
(17 MAR 2022) BEGINNING 1430 ZULU UNTIL JDAY 077 (18 MAR 2022)
ENDING 0230 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


03 Mar 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022008
SUBJ: SVN61 (PRN02) FORECAST OUTAGE JDAY 069/2345 - JDAY 070/1145
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022008
NANU DTG: 032027Z MAR 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 61
PRN: 02
START JDAY: 069
START TIME ZULU: 2345
START CALENDAR DATE: 10 MAR 2022
STOP JDAY: 070
STOP TIME ZULU: 1145
STOP CALENDAR DATE: 11 MAR 2022

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WILL BE UNUSABLE ON JDAY 069
(10 MAR 2022) BEGINNING 2345 ZULU UNTIL JDAY 070 (11 MAR 2022)
ENDING 1145 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


24 Feb 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022007
SUBJ: SVN70 (PRN32) FORECAST OUTAGE SUMMARY JDAY 055/0946 - JDAY 055/1448
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2022007
NANU DTG: 241504Z FEB 2022
REFERENCE NANU: 2022006
REF NANU DTG: 162012Z FEB 2022
SVN: 70
PRN: 32
START JDAY: 055
START TIME ZULU: 0946
START CALENDAR DATE: 24 FEB 2022
STOP JDAY: 055
STOP TIME ZULU: 1448
STOP CALENDAR DATE: 24 FEB 2022

2. CONDITION: GPS SATELLITE SVN70 (PRN32) WAS UNUSABLE ON JDAY 055
(24 FEB 2022) BEGINNING 0946 ZULU UNTIL JDAY 055 (24 FEB 2022)
ENDING 1448 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


16 Feb 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022006
SUBJ: SVN70 (PRN32) FORECAST OUTAGE JDAY 055/0930 - JDAY 055/2130
1. NANU TYPE: FCSTDV
NANU NUMBER: 2022006
NANU DTG: 162012Z FEB 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 70
PRN: 32
START JDAY: 055
START TIME ZULU: 0930
START CALENDAR DATE: 24 FEB 2022
STOP JDAY: 055
STOP TIME ZULU: 2130
STOP CALENDAR DATE: 24 FEB 2022

2. CONDITION: GPS SATELLITE SVN70 (PRN32) WILL BE UNUSABLE ON JDAY 055
(24 FEB 2022) BEGINNING 0930 ZULU UNTIL JDAY 055 (24 FEB 2022)
ENDING 2130 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


15 Feb 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022005
SUBJ: SVN77 (PRN14) UNUSABLE JDAY 046/0039 - JDAY 046/2102
1. NANU TYPE: UNUSABLE
NANU NUMBER: 2022005
NANU DTG: 152106Z FEB 2022
REFERENCE NANU: 2022004
REF NANU DTG: 150125Z FEB 2022
SVN: 77
PRN: 14
START JDAY: 046
START TIME ZULU: 0039
START CALENDAR DATE: 15 FEB 2022
STOP JDAY: 046
STOP TIME ZULU: 2102
STOP CALENDAR DATE: 15 FEB 2022

2. CONDITION: GPS SATELLITE SVN77 (PRN14) WAS UNUSABLE ON JDAY 046
(15 FEB 2022) BEGINNING 0039 ZULU UNTIL JDAY 046 (15 FEB 2022)
ENDING 2102 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


14 Feb 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022004
SUBJ: SVN77 (PRN14) UNUSABLE JDAY 046/0039 - UNTIL FURTHER NOTICE
1. NANU TYPE: UNUSUFN
NANU NUMBER: 2022004
NANU DTG: 150125Z FEB 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 77
PRN: 14
START JDAY: 046
START TIME ZULU: 0039
START CALENDAR DATE: 15 FEB 2022
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN77 (PRN14) WAS UNUSABLE ON JDAY 046
(15 FEB 2022) BEGINNING 0039 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


26 Jan 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022003
SUBJ: SVN41 (PRN22) USABLE JDAY 026/2140
1. NANU TYPE: USABINIT
NANU NUMBER: 2022003
NANU DTG: 262232Z JAN 2022
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 41
PRN: 22
START JDAY: 026
START TIME ZULU: 2140
START CALENDAR DATE: 26 JAN 2022
STOP JDAY: N/A
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN41 (PRN22) WAS USABLE AS OF JDAY 026
(26 JAN 2022) BEGINNING 2140 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


19 Jan 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022002 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
On approximately 20 JAN 2022, SVN41 will resume transmitting L-band utilizing PRN22.On 20 JAN 2022, after 2200Z, GPS will transition SVN41 (PRN22) into the broadcast almanac for all satellites:- The almanac transition, accomplished one satellite at a time, will require approximately 24 hours to complete- Before, during, and after transition SVN41 (PRN22) will remain unusable until further notice- Future NANUs will notify users of any changes to the above stated status
*** GENERAL MESSAGE TO ALL GPS USERS ***

POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


18 Jan 2022   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2022001
SUBJ: SVN47 (PRN22) DECOMMISSIONING JDAY 018/2200
1. NANU TYPE: DECOM
NANU NUMBER: 2022001
NANU DTG: 182156Z JAN 2022
REFERENCE NANU: 2021058
REF NANU DTG: 021637Z DEC 2021
SVN: 47
PRN: 22
UNUSABLE START JDAY: 336
UNUSABLE START TIME ZULU: 1637
UNUSABLE START CALENDAR DATE: 02 DEC 2021
DECOMMISSIONING START JDAY: 018
DECOMMISSIONING START TIME ZULU: 2200
DECOMMISSIONING START CALENDAR DATE: 18 JAN 2022

2. CONDITION: GPS SATELLITE SVN47 (PRN22) WAS UNUSABLE AS OF JDAY 336 (02 DEC 2021)
AND REMOVED FROM THE GPS CONSTELLATION ON JDAY 018 (18 JAN 2022).

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


27 Dec 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021062
SUBJ: SVN66 (PRN27) FORECAST OUTAGE SUMMARY JDAY 349/1925 - JDAY 361/1828
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2021062
NANU DTG: 271829Z DEC 2021
REFERENCE NANU: 2021061
REF NANU DTG: 101936Z DEC 2021
SVN: 66
PRN: 27
START JDAY: 349
START TIME ZULU: 1925
START CALENDAR DATE: 15 DEC 2021
STOP JDAY: 361
STOP TIME ZULU: 1828
STOP CALENDAR DATE: 27 DEC 2021

2. CONDITION: GPS SATELLITE SVN66 (PRN27) WAS UNUSABLE ON JDAY 349
(15 DEC 2021) BEGINNING 1925 ZULU UNTIL JDAY 361 (27 DEC 2021)
ENDING 1828 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


10 Dec 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021061
SUBJ: SVN66 (PRN27) FORECAST OUTAGE JDAY 349/1900 - JDAY 363/1900
1. NANU TYPE: FCSTMX
NANU NUMBER: 2021061
NANU DTG: 101936Z DEC 2021
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 66
PRN: 27
START JDAY: 349
START TIME ZULU: 1900
START CALENDAR DATE: 15 DEC 2021
STOP JDAY: 363
STOP TIME ZULU: 1900
STOP CALENDAR DATE: 29 DEC 2021

2. CONDITION: GPS SATELLITE SVN66 (PRN27) WILL BE UNUSABLE ON JDAY 349
(15 DEC 2021) BEGINNING 1900 ZULU UNTIL JDAY 363 (29 DEC 2021)
ENDING 1900 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


09 Dec 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021060
SUBJ: SVN61 (PRN02) FORECAST OUTAGE SUMMARY JDAY 343/1304 - JDAY 343/1934
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2021060
NANU DTG: 091939Z DEC 2021
REFERENCE NANU: 2021057
REF NANU DTG: 011645Z DEC 2021
SVN: 61
PRN: 02
START JDAY: 343
START TIME ZULU: 1304
START CALENDAR DATE: 09 DEC 2021
STOP JDAY: 343
STOP TIME ZULU: 1934
STOP CALENDAR DATE: 09 DEC 2021

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WAS UNUSABLE ON JDAY 343
(09 DEC 2021) BEGINNING 1304 ZULU UNTIL JDAY 343 (09 DEC 2021)
ENDING 1934 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


03 Dec 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021059
SUBJ: SVN57 (PRN29) FORECAST OUTAGE SUMMARY JDAY 337/0358 - JDAY 337/0931
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2021059
NANU DTG: 030951Z DEC 2021
REFERENCE NANU: 2021056
REF NANU DTG: 291607Z NOV 2021
SVN: 57
PRN: 29
START JDAY: 337
START TIME ZULU: 0358
START CALENDAR DATE: 03 DEC 2021
STOP JDAY: 337
STOP TIME ZULU: 0931
STOP CALENDAR DATE: 03 DEC 2021

2. CONDITION: GPS SATELLITE SVN57 (PRN29) WAS UNUSABLE ON JDAY 337
(03 DEC 2021) BEGINNING 0358 ZULU UNTIL JDAY 337 (03 DEC 2021)
ENDING 0931 ZULU.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL


02 Dec 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021058
SUBJ: SVN47 (PRN22) UNUSABLE JDAY 336/1637 - UNTIL FURTHER NOTICE
1. NANU TYPE: UNUSUFN
NANU NUMBER: 2021058
NANU DTG: 021637Z DEC 2021
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 47
PRN: 22
START JDAY: 336
START TIME ZULU: 1637
START CALENDAR DATE: 02 DEC 2021
STOP JDAY: UFN
STOP TIME ZULU: N/A
STOP CALENDAR DATE: N/A

2. CONDITION: GPS SATELLITE SVN47 (PRN22) WAS UNUSABLE ON JDAY 336
(02 DEC 2021) BEGINNING 1637 ZULU UNTIL FURTHER NOTICE.

3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL
MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526.
JSPOCCOMBATOPS@US.AF.MIL