Data Presented on this Web Site is Classified in Accordance With
NAVSTAR GLOBAL POSITIONING SYSTEM SYSTEM OPERATIONS PROTECT GUIDE - 1 August 97

- APPENDIX 1 - Details of the GPS System Security Feature - 1 August 97
- APPENDIX 2 - Details of the NDS Mission - 1 August 97
- APPENDIX 3 - Block IIF System - 1 August 97

Headquarters

Air Force Space Command
Peterson Air Force Base, CO  80914-4200

Address all inquires to :

Headquarters Air Force Space Command (AFSPC)/XOR
150 Vandenberg Street, Suite 1105
Peterson AFB, CO  80914-4200
(719) 554-5203/5612/3582
DSN 692-5203/5612/3582