低轨增强区域监测站覆盖性分析

Coverage Analysis of LEO Enhanced Regional Monitoring Stations

监测站的分布和数量直接影响导航卫星的定轨精度、参数解算及状态监测。给出了监测站覆盖性评估方法,并利用真实的全球导航卫星系统(GNSS)轨道数据和仿真的低地球轨道(LEO)星座,对不同数量区域增强监测站的覆盖范围及深度、跟踪平均值和可视弧段占比进行了仿真试验分析。得出的结论是:增加区域监测站的数量仅对GNSS卫星的覆盖性有一定提升,但无法有效改善LEO卫星,需进行全球布站或结合星载接收机数据进一步分析。

The distribution and number of monitoring stations directly affect the orbit determination accuracy,parameter calculation and status monitoring of navigation satellites.A method for evaluating the coverage of monitoring stations is provided,and real Global Navigation Satellite Systems(GNSS) orbit data is used and Low Earth Orbit(LEO) constellations are simulated to conduct simulation experiments on enhancing the coverage range and depth,tracking average,and visible arc proportion of monitoring stations in different numbers of areas.The conclusion drawn is that increasing the number of regional monitoring stations only improves the coverage of GNSS satellites to a certain extent,but cannot effectively improve LEO satellites.Therefore,global station deployment or further analysis based on satellite receiver data is needed.