Evolution Of The GPS Navigation Payload - Stanford Center for ...

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Navigation Payloads have Supplied the Path for GPS Capability and Growth 10/22/09 1974-1983 1983-1988 1987-1989 1988-1999 2000-Present 2003-Present ROCKWELL Block I Block II/IIA Payload Box Study Block IIR Block IIR M Block IIF 12 Flight Payloads GPS Signals • Code Generators • L1 Transmitter • L2 Transmitter ROCKWELL USAF LOCKHEED MARTIN 28 Flight Payloads GPS Transmitters • L1 • L2 • Triplexer 2 Breadboard Payloads GPS Payload System • Mission Computer • Atomic Clocks • Crosslink Transponder An Instrumental Part of the Continuous Evolution of GPS 21 Flight Payloads Fully Integrated GPS Payload • On-Orbit Reprogramability • Crosslink Ranging • Self Navigation (AutoNav) • Improved Accuracy (1m) • Improved Time Keeping • Improved Security LOCKHEED MARTIN 8 Flight Payloads GPS Modernization • On-Orbit Signal Structure Changes • Enhanced Signal Security Per NSA • High Power GaAs Transmitters • New High Power Military Unique Signals Use or disclosure of this information is subject to the restrictions on the Title Page of this document. BOEING 12 Flight Payloads GPS Modernization • Flexible RF Power • High Power GaAs Transmitters 2
10/22/09 For GPS Block I and II, ITT’s PRNSA Develops and Transmits the GPS L1&L2 Signals Baseband Processor Synthesizer L1 MOD IPA L2 MOD IPA ITT’s Pseudo Random Noise Signal Assembly (PRNSA) Use or disclosure of this information is subject to the restrictions on the Title Page of this document. L1 HPA L2 HPA Diplexer 3
Page 1: ITT Space Systems Division Evolutio
Page 5 and 6: 10/22/09 Navigation Panel GPS IIR S
Page 7 and 8: MDU Controls the Total NAV Payload
Page 9 and 10: 10/22/09 Autonav Gives Satellites t
Page 11 and 12: 10/22/09 Autonav as an Aid To GPS C
Page 13 and 14: RAFS-IIR 13 13.4 MHz Weight 11.6 lb
Page 15 and 16: 15 2008 IEEE International Frequenc
Page 17: 10/22/09 Are We There Yet? Future o

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