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The Use of X-Ray Pulsars for Aiding GPS Satellite Orbit Determination
Paperback
Technology & EngineeringPhysics
ISBN13: 9781025135991
Publisher: Hutson Street Press
Published: May 22 2025
Pages: 170
Weight: 0.54
Height: 0.36 Width: 6.14 Depth: 9.21
Language: English
This research proposes the use of an existing signal of opportunity - namely x-ray pulsars - to improve the accuracy and robustness of the GPS satellite and clock estimation algorithm. Improvement in satellite and clock accuracy results in a direct benefit to the user. A simulation has been developed to determine the effects of using x-ray pulsar measurements on the GPS Operational Control Segment. The epoch-specific position, velocity, and clock errors of all GPS satellites in the constellation were estimated using both pseudoranges and time-difference-of-arrival (TDOA) measurements from pulsars. The primary measure of accuracy is a constellation Signal-In-Space Range Error (SISRE).
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