不同经验太阳光压模型对于北斗卫星定轨的适用性分析

当前的北斗卫星导航系统尚缺乏合适的太阳光压模型,由GPS的ECOM模型衍生而来的多种经验光压模型常被用于北斗定轨中。从观测值残差、轨道内、外符精度以及外推精度等方面比较分析了目前常用的4种经验光压模型对于北斗卫星定轨的适用性。结果表明,不同(类型)卫星适用不同的经验光压模型,但总体来看,9参数模型的适用性最差,而5参数和7参数模型的适用性相对较好。

Application Analysis of Different Empirical Solar Radiation Models for Orbit Determination of BDS Satellites

No proper Solar Radiation Pressure ( SRP) model for the BeiDou Navigation Satellite System ( BDS) has been specifically proposed yet, thus different empirical SRP models derived from the Empirical CODE Orbit Model ( ECOM) which was developed for GPS by the Center for Orbit Determination in Europe ( CODE) have been adopt-ed for the precise orbit determination of BDS. Applicability of the four empirical SRP models most widely used by various research institutions currently have been compared and analysed comprehensively in terms of residuals, in-ternal and external orbit accuracy and prediction accuracy. Results show that, the four SRP models suit different types of satellites, but in general, the two models with 5 and 7 parameters respectively have better applicability while that with 9 parameters has the worst.