基于不同空间尺度测站网的BDS-3 GEO卫星轨道机动实时监测

地球静止轨道(GEO)卫星为保持地球同步特性，需要频繁进行轨道机动，及时准确的对卫星轨道机动的状态进行动态监测，有助于对卫星真实轨道进行修复，使其在机动过程中仍能提供基本可用的轨道参数. 利用基于历元差分测速原理的卫星轨道监测模型，对北斗三号卫星导航系统(BDS-3)的2颗GEO卫星各12次历史机动进行了分析. 结果表明:所选不同空间尺度测站网均可以对C59卫星的机动时间与轨道动态变化进行实时监测，且监测结果基本一致. 另外，本文所选的不同空间尺度测站网均可对C60卫星机动时间进行精准探测，但在对其轨道状态进行实时监测时，空间尺度较大的测站网监测结果更优. 

Real-time monitoring of orbital maneuvers of BDS-3 GEO satellites based on station networks of different spatial scales

In order to maintain the geosynchronous characteristics of geostationary earth orbit (GEO) satellites, frequent orbital maneuvers are required. Timely and accurate dynamic monitoring of the state of satellite orbit maneuvers is helpful for repairing the true satellite orbit, so that it can still provide basic orbital parameters during maneuvering. In this paper, 12 historical maneuvers of each of the two GEO satellites of BeiDou-3 Navigation Satellite System (BDS-3) are analyzed using a satellite orbit monitoring model based on the principle of time differential velocity measurement. The results show that the station network of different spatial scales selected in this paper can monitor the maneuver period and orbital dynamic variation of the C59 satellite in real time, and the monitoring results are basically consistent. In addition, the station networks of different spatial scales selected in this paper can accurately detect the maneuver period of the C60 satellite, but when monitoring its orbital state in real time, the monitoring results of the station network with a larger spatial scale are better.