Invention Grant
US08228230B1 Satellite orbit prediction method, receiving apparatus and navigation satellite system employing the method 有权
卫星轨道预测方法,采用该方法的接收装置和导航卫星系统

Satellite orbit prediction method, receiving apparatus and navigation satellite system employing the method
Abstract:
A satellite orbit prediction method of a satellite navigation system includes storing satellite past ephemerides data associated with past time intervals and satellite recent ephemeris data associated with a recent time interval, and computing reference satellite positions based on the past and recent ephemerides data. The method also includes: computing estimated satellite positions by propagating on the past time intervals using a celestial mechanics force model and the recent ephemeris data, computing errors from the reference satellite positions and estimate satellite positions, and identifying a position error function by fitting a curve to the computed errors. The position error function is used to obtain corrected predicted satellite orbit portions.
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