导航卫星星座整体旋转的检测与校正

The Inspection and Correction of the Revolution Round the Earth of Navigation Satellite Constellation

研究了利用星间距离观测值或速度观测值进行导航卫星自主定轨时存在的卫星星座整体旋转的问题,并提出了消除该系统误差的地面校正法。利用含有系统误差ΔΩ的卫星星历进行单点定位时,求得的点位大地经度也会产生ΔL的偏差,且ΔL=ΔΩ,因此,由点位大地经度差ΔL即可确定卫星星座整体旋转误差。试验结果表明,ΔΩ与ΔL的差值不到10-5秒,从而证实该方法是有效的。

The question of rank-deficient normal equation of making autonomous orbit determination with distance and velocity obsorvations among satellites is discussed, and the method of modifying the systematic error on the ground is supported. The longitude of point will contain an error △L when the satellite have an systematic error △Ω during the point positioning, and △L is equal to △Ω , then the systematic error △Ω can be corrected. Basing the feasibility analysis result, some useful conclusion was found out.