Evolution Of The GPS Navigation Payload - Stanford Center for ...
Evolution Of The GPS Navigation Payload - Stanford Center for ...
Evolution Of The GPS Navigation Payload - Stanford Center for ...
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<strong>Navigation</strong> <strong>Payload</strong>s have Supplied the Path <strong>for</strong> <strong>GPS</strong><br />
Capability and Growth<br />
10/22/09<br />
1974-1983 1983-1988 1987-1989 1988-1999 2000-Present 2003-Present<br />
ROCKWELL<br />
Block I Block II/IIA <strong>Payload</strong> Box Study Block IIR<br />
Block IIR M Block IIF<br />
12 Flight<br />
<strong>Payload</strong>s<br />
<strong>GPS</strong> Signals<br />
• Code Generators<br />
• L1 Transmitter<br />
• L2 Transmitter<br />
ROCKWELL USAF LOCKHEED<br />
MARTIN<br />
28 Flight<br />
<strong>Payload</strong>s<br />
<strong>GPS</strong><br />
Transmitters<br />
• L1<br />
• L2<br />
• Triplexer<br />
2 Breadboard<br />
<strong>Payload</strong>s<br />
<strong>GPS</strong> <strong>Payload</strong><br />
System<br />
• Mission<br />
Computer<br />
• Atomic Clocks<br />
• Crosslink<br />
Transponder<br />
An Instrumental Part of<br />
the Continuous <strong>Evolution</strong> of <strong>GPS</strong><br />
21 Flight<br />
<strong>Payload</strong>s<br />
Fully Integrated<br />
<strong>GPS</strong> <strong>Payload</strong><br />
• On-Orbit<br />
Reprogramability<br />
• Crosslink Ranging<br />
• Self <strong>Navigation</strong><br />
(AutoNav)<br />
• Improved Accuracy<br />
(1m)<br />
• Improved Time<br />
Keeping<br />
• Improved Security<br />
LOCKHEED<br />
MARTIN<br />
8 Flight<br />
<strong>Payload</strong>s<br />
<strong>GPS</strong><br />
Modernization<br />
• On-Orbit Signal<br />
Structure Changes<br />
• Enhanced Signal<br />
Security Per NSA<br />
• High Power GaAs<br />
Transmitters<br />
• New High Power<br />
Military Unique<br />
Signals<br />
Use or disclosure of this in<strong>for</strong>mation is subject to the restrictions on the Title Page of this document.<br />
BOEING<br />
12 Flight<br />
<strong>Payload</strong>s<br />
<strong>GPS</strong><br />
Modernization<br />
• Flexible RF Power<br />
• High Power GaAs<br />
Transmitters<br />
2
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