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原文传递 Satellite Ephemeris Correction via Remote Site Observation for Star Tracker Navigation Performance Improvement.

题名：	Satellite Ephemeris Correction via Remote Site Observation for Star Tracker Navigation Performance Improvement.
作者：	Diaz, J. E.
关键词：	Kalman filters, Artificial satellites, Space objects, Low earth orbits, Global navigation satellite systems, Celestial navigation, Star trackers, Altitude, Altimeters, Simulations, Image processing, Extended kalman filter, Star tracker, Celestial navigation, Satellite observation, Ephemeris correction, Image-aided navigation
摘要：	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.
报告类型：	科技报告