The NASA Global Differential GPS System (GDGPS) and The ...
The NASA Global Differential GPS System (GDGPS) and The ...
The NASA Global Differential GPS System (GDGPS) and The ...
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TASS message<br />
• 0.5 Hz <strong>GPS</strong> corrections<br />
• 5 sec integrity alarms<br />
• Earth orientation<br />
• Solar flux<br />
• Data authentication<br />
GD<strong>GPS</strong> Operations Center<br />
GD<strong>GPS</strong> Network<br />
TASS Architectural Components<br />
TASS Transmitter<br />
• Baseb<strong>and</strong> or IF interface<br />
• 2.5 MHz PN code<br />
• Synchronized with <strong>GPS</strong> time<br />
• Viterbi encoding<br />
TASS<br />
Computer<br />
<strong>NASA</strong>’s <strong>Global</strong> <strong>Differential</strong> <strong>GPS</strong> <strong>System</strong><br />
TASS<br />
Transmitter<br />
IF Interface<br />
Baseb<strong>and</strong><br />
Interface<br />
<strong>NASA</strong><br />
TDRS<br />
• 3 element array for wide beam<br />
Y. Bar-Sever - 16
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