| Abstract:In order to solve the long time orbit prediction of the autonomous mission planning on-board, a autonomous orbit prediction method with small space and faster running speed is provided. A method for Satellite Orbit Prediction With Ground and On-board (SOPWGO) is designed. In the respect of Ground, it adopts the precise orbit prediction model, gives the orbital roots with specified time intervals in the future, and then injectes these orbital roots to satellite through the timely channel(like Beidou). On the orther hand, in the respect of On-board it adopts the simplified orbit prediction model and piecewise orbit predictes based on the those orbital roots, then which are splited joint to use. The method not only effectively improves the accuracy of satellite orbit prediction (interval time is 600s, the error of the position is less than 35m), but also greatly enhances the calculation speed by parallel computing (interval time is 600s, the time consumption is less than 0.001s). In addition, the relation equation between the prediction accuracy and the interval time is given by the least square fitting, which can guide the setting of interval time using SOPWGO. The SOPWGO has successfully and effectively solved the problem of the long time orbit prediction for autonomous satellites. |
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