摘要
为了进一步提高LEO星座的自主定轨精度,提出一种星间/星地链路联合观测的优化方案:以全球覆盖的6/8近极轨LEO星座为例,对该方案中锚固站的位置、数量、观测弧长,以及观测卫星的选取,星间/星地链路观测量的系统差、随机差等因素进行定轨性能仿真和综合评估。结果表明:在星地链路中,只需一个锚固站就可以显著提高卫星定轨精度,且在每个轨道面内均有被观测卫星时的定轨精度最好;在链路误差中,卫星定轨精度对星间链路系统误差最敏感。结果可为LEO星座建设和地面测控网的布设提供参考。
In order to further improve the accuracy of autonomous orbiting for LEO constellation,the paper proposed an optimized scheme of joint observations between ISL and satellite-to-earth link：6/8 nearly polar-orbiting LEO constellation were taken for example,the ability of the orbit determination for LEO constellation was comprehensively evaluated in the scheme from the aspects of the position,number and visual arc length of the ground stations,the selection of the observation satellites,and the random difference and systematic errors in the links.Results showed that a single ground station and the observed satellites distributed in each orbital plane could significantly improve the orbiting precision,and the orbiting precision would be most sensitive to the systematic errors of ISLs,which could provide a reference for the construction of LEO constellation and the layout of the ground control network.
作者
高华宇
杜兰
郭肃丽
于晴
GAO Huayu;DU Lan;GUO Suli;YU Qing(The 54th Research Institute of CETC, Shijiazhuang 050081, China;CETC Key Laboratory of Aerospace Information Applications, Shijiazhuang 050081, China;Institute of Navigation ＆Aerospace, Information Engineering University, Zhengzhou 450000, China)
出处
《导航定位学报》
CSCD
2018年第2期57-62,共6页
Journal of Navigation and Positioning
关键词
星间链路
LEO星座
自主定轨
锚固站
方案优化
ISLs
LEO constellation
auto orbit cleterrnination
ground station
scheme optimization
