The stationkeeping and perturbation effects on the performance of an optimized constellation are investigated, along with the constellation stability at various altitudes. Focus is placed on the Global Positioning System (GPS) longitude drift at the nominal GPS altitude and the long-term orbital motion and longitude variations at altitudes different from the nominal GPS altitude with repeating ground tracks. It is shown that a slight (50 km) altitude change can reduce the resonant tesseral harmonic effects significantly and can lead to the elimination of stationkeeping maneuvers while keeping the resulting longitude deviations within + or - 1 deg. Impact on the autonomous momentum management system onboard the Block II GPS spacecraft is outlined as well as the Yuma test.
- Pub Date:
- Global Positioning System;
- Orbital Maneuvers;
- Satellite Ground Tracks;
- Space Communications, Spacecraft Communications, Command and Tracking