An extended Kalman filter is used to process line-of-sight measurements tos tars and known landmarks providing a statistical indication of performance in estimating spacecraft attitude, orbital ephemeris, and the bias drift of a set of three strapdown gyros. The landmark measurements were assumed to have beent aken from the imagery of an Earth-observing multispectral scanner. It is shown that filtering of these noisy measurements results in highly accurate estimates of the above parameters. Results are given showing the sensitivity of performance to various system parameters such as star tracker accuracy, errors in the knowledge of landmark position and number of stars and landmarks processed.
Attitude and orbit estimation using stars and landmarks
Abschaetzung von Lage und Umlaufbahn mittels Sternen und Landmarken
IEEE Transactions on Aerospace and Electronic Systems ; 11 , 2 ; 195-203
1975
9 Seiten, 8 Bilder, 7 Quellen
Aufsatz (Zeitschrift)
Englisch
Attitude and orbit estimation using stars and landmarks
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