1. GLOBAL POSITIONING SYSTEM (GPS) CONSTELLATION STATUS December 1999 Captain Zannis Pappas HQ Air Force Space Command (DORS)

2. Overview GPS Constellation Health/Status Launch Schedule Current Transition Plan Summary

3. Constellation Health/Status SLOT 1 2 3 4 5 PLANE A SVN39 SVN22 SVN37SVN31 SVN28 SVN36 SVN34SVN17SVN15SVN24 SVN23SVN40SVN21SVN14 SVN32SVN26SVN18SVN29 SVN25SVN19 SVN30SVN13SVN35 SVN27 SVN33 SVN16 B C D E F SVN38 27 Operational Satellites On Orbit End of Life SVN43 IIR-2 SVN46 IIR-3

4. Launch Schedule SCHEDULED GPS LAUNCHES FY 99 - FY 05: Block IIRBlock IIF FY 00:30 FY 01:30 FY 02:30 FY 03:40 FY 04:30 FY 05:21

5. Current Transition Plan Lockheed Martin Mission Systems (LMMS) Upgrade Dedicated Monitor Stations and Ground Antennas with New Digital Receivers and Computers Replace Existing Master Control Station Mainframe Computer With a Distributed Architecture Add Accuracy Improvement Initiative, Air Force Satellite Control Network, and Full IIR Capabilities Build Fully Mission Capable Alternate Master Control Station (AMCS) at Vandenberg Tracking Station Boeing North America (BNA) Add IIF Command and Control Functionality 2-Step Plan: Replace Existing Mainframe With Distributed Architecture Then Add Block IIF Functionality

6. Summary GPS is a Healthy Constellation - 27 Operational Satellites - Navigation Payloads Operating Great Block IIR - SVN43 Bus and Navigation Payload Nominal - Solid Navigation Performance - 18 more pending Block IIR launches scheduled Block IIF - Air Force has committed to purchase 6 Block IIF satellites for now, with an option (on a case by case annual basis) to procure a total of 30