不同光压模型对北斗IGSO与MEO卫星定轨的适用性分析

Applicability of Different Solar Radiation Pressure Models for Beidou IGSO and MEO Satellites Orbit Determination

为分析不同光压模型在北斗卫星处于不同姿态控制模式下的定轨性能,从轨道内、外符合精度等方面分析ECOM 5参数模型、Box-Wing+ECOM 5参数模型和拓展版ECOM模型对北斗IGSO与MEO卫星定轨的适用性。结果显示,卫星处于非地影期时,BDS-2卫星使用ECOM 5参数模型时内、外符合精度最优,而BDS-3 MEO卫星使用Box-Wing+ECOM 5参数模型与拓展版ECOM模型时的轨道精度要略优于ECOM 5参数模型,3者内符合精度差异小于1 cm;卫星处于地影期时,BDS-2与BDS-3 MEO卫星使用拓展版ECOM模型精度最高,与其他光压模型相比,其轨道切向与法向内符合精度提升约20%~70%;对于BDS-3 IGSO卫星,由于观测数较少,导致其轨道精度要远低于其他北斗卫星,但综合来看,ECOM 5参数模型表现略优。

To analyze the orbit determination performance of different solar radiation pressure models under different attitude control modes of Beidou satellite, we analyze the applicability of ECOM 5 parameter model, Box-Wing+ECOM 5 parameter model and extended ECOM model for Beidou IGSO and MEO satellites orbit determination from the aspects of internal and external orbit accuracy. The results show that with the satellite in non-earth eclipse segment, BDS-2 satellite using ECOM 5 parameters has the best internal and external accuracy, while the orbit accuracy of BDS-3 MEO satellite using Box-Wing+ECOM 5 parameters and extended ECOM 5 parameters is slightly better than ECOM 5 parameters;the difference of internal accuracy is less than 1 cm. When the satellite is in the earth eclipse segment, the extended ECOM has the best applicability for BDS-2 and BDS-3 MEO satellites. Compared with other solar radiation pressure models, the accuracy of along and cross internal accuracy is improved by about 20% and 70%. For BDS-3 IGSO satellite, the orbit accuracy is much lower than other Beidou satellites due to the small number of observations, but on the whole, ECOM 5 parameter model performs slightly better.