Most Recent Advisory
23 Sep 2022
    Login
CURRENT ADVISORIES

  
 
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


01 Dec 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021057
SUBJ: SVN61 (PRN02) FORECAST OUTAGE JDAY 343/1245 - JDAY 344/0045
1. NANU TYPE: FCSTDV
NANU NUMBER: 2021057
NANU DTG: 011645Z DEC 2021
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 61
PRN: 02
START JDAY: 343
START TIME ZULU: 1245
START CALENDAR DATE: 09 DEC 2021
STOP JDAY: 344
STOP TIME ZULU: 0045
STOP CALENDAR DATE: 10 DEC 2021

2. CONDITION: GPS SATELLITE SVN61 (PRN02) WILL BE UNUSABLE ON JDAY 343
(09 DEC 2021) BEGINNING 1245 ZULU UNTIL JDAY 344 (10 DEC 2021)
ENDING 0045 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 Nov 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021056
SUBJ: SVN57 (PRN29) FORECAST OUTAGE JDAY 337/0300 - JDAY 337/1500
1. NANU TYPE: FCSTDV
NANU NUMBER: 2021056
NANU DTG: 291607Z NOV 2021
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 57
PRN: 29
START JDAY: 337
START TIME ZULU: 0300
START CALENDAR DATE: 03 DEC 2021
STOP JDAY: 337
STOP TIME ZULU: 1500
STOP CALENDAR DATE: 03 DEC 2021

2. CONDITION: GPS SATELLITE SVN57 (PRN29) WILL BE UNUSABLE ON JDAY 337
(03 DEC 2021) BEGINNING 0300 ZULU UNTIL JDAY 337 (03 DEC 2021)
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


15 Nov 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021055
SUBJ: SVN56 (PRN16) FORECAST OUTAGE SUMMARY JDAY 319/2053 - JDAY 320/0146
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2021055
NANU DTG: 160148Z NOV 2021
REFERENCE NANU: 2021053
REF NANU DTG: 082028Z NOV 2021
SVN: 56
PRN: 16
START JDAY: 319
START TIME ZULU: 2053
START CALENDAR DATE: 15 NOV 2021
STOP JDAY: 320
STOP TIME ZULU: 0146
STOP CALENDAR DATE: 16 NOV 2021

2. CONDITION: GPS SATELLITE SVN56 (PRN16) WAS UNUSABLE ON JDAY 319
(15 NOV 2021) BEGINNING 2053 ZULU UNTIL JDAY 320 (16 NOV 2021)
ENDING 0146 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 Nov 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021054
SUBJ: SVN69 (PRN03) FORECAST OUTAGE SUMMARY JDAY 300/1635 - JDAY 312/2124
1. NANU TYPE: FCSTSUMM
NANU NUMBER: 2021054
NANU DTG: 082122Z NOV 2021
REFERENCE NANU: 2021052
REF NANU DTG: 251957Z OCT 2021
SVN: 69
PRN: 03
START JDAY: 300
START TIME ZULU: 1635
START CALENDAR DATE: 27 OCT 2021
STOP JDAY: 312
STOP TIME ZULU: 2124
STOP CALENDAR DATE: 08 NOV 2021

2. CONDITION: GPS SATELLITE SVN69 (PRN03) WAS UNUSABLE ON JDAY 300
(27 OCT 2021) BEGINNING 1635 ZULU UNTIL JDAY 312 (08 NOV 2021)
ENDING 2124 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 Nov 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021053
SUBJ: SVN56 (PRN16) FORECAST OUTAGE JDAY 319/2015 - JDAY 320/0815
1. NANU TYPE: FCSTDV
NANU NUMBER: 2021053
NANU DTG: 082028Z NOV 2021
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 56
PRN: 16
START JDAY: 319
START TIME ZULU: 2015
START CALENDAR DATE: 15 NOV 2021
STOP JDAY: 320
STOP TIME ZULU: 0815
STOP CALENDAR DATE: 16 NOV 2021

2. CONDITION: GPS SATELLITE SVN56 (PRN16) WILL BE UNUSABLE ON JDAY 319
(15 NOV 2021) BEGINNING 2015 ZULU UNTIL JDAY 320 (16 NOV 2021)
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


25 Oct 2021   
NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021052
SUBJ: SVN69 (PRN03) FORECAST OUTAGE JDAY 300/1500 - JDAY 314/1500
1. NANU TYPE: FCSTMX
NANU NUMBER: 2021052
NANU DTG: 251957Z OCT 2021
REFERENCE NANU: N/A
REF NANU DTG: N/A
SVN: 69
PRN: 03
START JDAY: 300
START TIME ZULU: 1500
START CALENDAR DATE: 27 OCT 2021
STOP JDAY: 314
STOP TIME ZULU: 1500
STOP CALENDAR DATE: 10 NOV 2021

2. CONDITION: GPS SATELLITE SVN69 (PRN03) WILL BE UNUSABLE ON JDAY 300
(27 OCT 2021) BEGINNING 1500 ZULU UNTIL JDAY 314 (10 NOV 2021)
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