Lou Yidong, Liu Yang, Shi Chuang, Yao Xiuguang, Zheng Fu
GNSS Research Centre, Wuhan University, Wuhan 430079, China.
1] GNSS Research Centre, Wuhan University, Wuhan 430079, China [2] State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China.
Sci Rep. 2014 Apr 15;4:4692. doi: 10.1038/srep04692.
Chinese BeiDou Navigation Satellite System is officially operational as a regional constellation with five Geostationary Earth Orbit (GEO) satellites, five Inclined Geosynchronous Satellite Orbit (IGSO) satellites and four Medium Earth Orbit (MEO) satellites. Observations from the BeiDou Experimental Tracking Stations (BETS) and the IGS Multi-GNSS Experiment (MGEX) network from 1 January to 31 March 2013 are processed for orbit determination of the BeiDou constellation. Various arc lengths and solar radiation pressure parameters are investigated. The reduced set of ECOM five-parameter model produces better performance than the full set of ECOM nine-parameter model for BeiDou IGSO and MEO. The orbit overlap for the middle days of 3-day arc solutions is better than 20 cm and 14 cm for IGSO and MEO in RMS, respectively. Satellite laser ranging residuals are better than 10 cm for both IGSO and MEO. For BeiDou GEO, the orbit overlap of several meters and satellite laser ranging residuals of several decimetres can be achieved.
中国北斗导航卫星系统正式作为区域星座运行，由五颗地球静止轨道（GEO）卫星、五颗倾斜地球同步轨道（IGSO）卫星和四颗中地球轨道（MEO）卫星组成。对北斗实验跟踪站（BETS）和国际GNSS服务组织（IGS）多GNSS实验（MGEX）网络在2013年1月1日至3月31日期间的观测数据进行处理，以确定北斗星座的轨道。研究了不同弧长和太阳辐射压力参数。简化后的ECOM五参数模型在北斗IGSO和MEO卫星上的性能优于完整的ECOM九参数模型。对于3天弧段解的中间几天，IGSO和MEO卫星的轨道重叠度在均方根误差（RMS）方面分别优于20厘米和14厘米。IGSO和MEO卫星的卫星激光测距残差均优于10厘米。对于北斗GEO卫星，可以实现几米的轨道重叠度和几分米的卫星激光测距残差。
