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一种地球静止轨道卫星轨道快速恢复定轨方法

郭睿1,周建华胡小工3,刘利1,黄勇4,常志巧   

  • 收稿日期:2011-03-23 修回日期:1900-01-01 出版日期:2011-05-05 发布日期:2015-06-24
  • 通讯作者: 郭睿

A New Strategy of Rapid Orbit Recovery for the Geostaionary Satellite

  • Received:2011-03-23 Revised:1900-01-01 Online:2011-05-05 Published:2015-06-24

摘要: GEO卫星频繁的轨道机动对高精度、实时不间断的导航服务需求提出了新的更高要求,如何在短弧跟踪条件下提高GEO卫星轨道快速恢复能力,是提升导航系统服务精度的关键因素。针对该问题,本文首次提出了基于9参数星历拟合的GEO卫星短弧运动学定轨方法,详细推导了定轨的数学模型与偏导模型,针对GEO卫星星历参数拟合中的奇异问题,提出了相应的解决方法和措施。利用COMPASS GEO卫星实测自发自收数据进行了短弧定轨试验与分析,结果表明1)10分钟短弧运动学定轨的位置精度优于19m,速度精度为4mm/s,速度精度明显优于MEO卫星;2)预报5分钟的位置精度为17.760m,预报10分钟的位置精度为18.168m;3)克服了短弧跟踪条件下动力学法定轨和单点定位中诸多问题,解决了GEO卫星频繁轨控所带来的轨道快速恢复问题,满足了短弧跟踪条件下RDSS的服务需求。

Abstract: Real time, continuous and high precision orbit is needed for the geostationary satellite (GEO) orbit maneuver. How to recover orbit rapidly for GEO based on short-arc tracking is the key factor. This paper introduced a new kinematic orbit determination approach in order to solve this problem, which was based on 9-parameter ephemeris parameter fitting. The mathematical model and partial derivative model were deduced in detail. And the coordinate rotation method was introduced to solve the singular problem in the ephemeris parameter fitting for the GEO satellite. In order to check the precision and availability of this method, the short-arc orbit determination tests were carried out using real COMPASS GEO C-band transfer ranging data. The results indicated that: 1) with a 10 minutes tracking arc the position accuracy was better than 19 m, the velocity accuracy was 4mm/s, which was better than the MEO satellite; 2) the 5-minute orbit prediction accuracy was 17.76m, and the 10-minute orbit prediction accuracy was 18.168 m; 3) several problems in the dynamics orbit determination and single point position determination were solved, the rapid orbit recovery for GEO was achieved, which satisfied the requirement of RDSS.