【作者】 宋小勇； 贾小林； 吴显兵； 毛悦；

【Author】 Song Xiaoyong Jia Xiaoling Wu Xianbing Mao Yue (Xi’an Research Institute of Surveying and Mapping,1 Middle Yanta Road,Xi’an 710054)

【机构】 西安测绘研究所；

【摘要】 我国COMPASS卫星导航系统用GEO卫星作为导航星座,由于GEO卫星要进行位置保持及倾角保持,需要定期进行轨道机动,如何实现机动期间精密定轨及轨道预报是COMPASS导航系统正常运行需要解决的问题。利用国内基于C波段转发测距体制获取的实测GEO卫星机动期间测轨数据,分别用常数经验力模型、脉冲力模型、脉冲机动力模型、短弧动力学法进行机动期间动力学定轨试验,用轨道重叠弧段法、定轨残差分析法对四种模型轨道确定及预报效果进行评价。结果表明,脉冲机力模型具有最好的轨道拟合及轨道预报效果,脉冲机动力模型尽管增加了解算参数,但对预报结果改善有限。更多还原

【Abstract】 COMPASS navigation system of our courtry includes GEO satellite as one kind of its constellation.Because GEO satellite must has a East-West contr01 and North-South control for the orbit station-keeping.the GEO’S orbit must be maneuver periodically.The method of the orbit determination and orbit prediction must be presented for the COMPASS navigation sysytem.Based on the measurement from C transponder by TWTF.Several methods incude the piece constant model.the pulse model.the impulse motor bom model and the short-arc dynamical were used to determinate the maneuver orbit.and the RMS of the overlap and residual were used to assess the precision of this method.It showed that the pulse model has the best accury for orbit determination and prediction.and the motor pulse model has little improve to the orbit prediction with increasing the number of parameter estimated.更多还原