Satellite Ephemeris Correction via Remote Site Observation for Star Tracker Navigation Performance Improvement
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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This thesis analyzed a method to correct for satellite ephemeris to be used in celestial navigation applications. This correction is the measured angle difference between the expected location of the satellite, which is given by propagating publicly available Two-Line Element sets TLE, and their observed angles from a precisely known reference site. Therefore, the angle difference can be attributed completely to satellite ephemeris error assuming instrument error was accounted for. The intent is to calculate this correction from the reference site and relate it to remote sites that have visibility of the same satellite, but where its own location is known with some uncertainty. The effects of increased baseline distances from the reference site are studied, as well as time delays.
- Unmanned Spacecraft
- Space Navigation and Guidance