Modeling of nongravitational effects on GPS satellites
Abstract
This analysis was conducted using precision (1 meter) radar and optical tracking data from the Deep Space Surveillance Network. Three years of data have been analyzed. Because of the robustness of the data (1000 observations/month) and the extended period over which data has been analyzed (3 years), tracking data from only two satellites (Navstar 8 and Navstar 10) were processed. Utilizing this data, independent 30 day trajectories, for each satellite, were computed every 15 days, including a constant ybias acceleration due to thermal radiation, and a scale factor for the solar radiation pressure constant. A time series of estimated ybias values is presented for both satellites. It is determined that the ybias is nonconstant; furthermore, it varies as a function of the difference between the longitude of the sun and the longitude of the ascending node of the orbit.
 Publication:

Astrodynamics 1987
 Pub Date:
 1988
 Bibcode:
 1988asdy.conf..571P
 Keywords:

 Deep Space Network;
 Global Positioning System;
 Navstar Satellites;
 Orbit Perturbation;
 Satellite Orbits;
 Radar Tracking;
 Radiation Pressure;
 Satellite Tracking;
 Solar Radiation;
 Time Series Analysis;
 Space Communications, Spacecraft Communications, Command and Tracking