卫星与测站钟差支持条件下的GEO卫星精密定轨  

Precise Orbit Determination for GEO Satellites Based on Both Satellite Clock Offsets and Station Clock Offsets

作　　者：郭睿[1] 刘利[1] 李晓杰[2] 程越 常志巧[1] 

机构地区：[1]北京环球信息应用开发中心 [2]解放军测绘学院 [3]解放军96656部队

出　　处：《空间科学学报》2012年第3期405-411,共7页Chinese Journal of Space Science

基　　金：武汉大学地球空间环境与大地测量教育部重点实验室测绘基础研究基金(10-01-11);2011年第二届中国卫星导航学术年会;第49批中国博士后科学基金共同资助

摘　　要：在基于伪距的GEO卫星精密定轨中,GEO卫星的静地特性导致定轨解算无法对星地组合钟差进行有效估计,需要独立的时间同步支持.本文讨论了卫星和测站钟差支持条件下的GEO卫星定轨原理,利用仿真数据系统地分析了中国区域网跟踪条件下GEO卫星的定轨精度,从定性和定量角度分析了钟差二次项、星地时间同步精度、站间时间同步精度及系统差等因素对定轨精度的影响.Because of its dynamical features, orbit parameters of the Geostationary satellite （GEO） are strongly correlated with clock offset parameters in Precise Orbit Determination （POD） when using the L-band pseudorange data. In order to solve this problem, clock offsets of the satellite clock as well as the receiver clock are introduced, which are obtained by unattached observation technology. Therefore, the psendorange data could be converted to ranging data. This paper discussed the GEO POD principle based on pseudorange data with the support of clock offsets, and analyzed the POD accuracy using simulation data from China regional tracking network. Influences from the clock offsets a2 item and errors of the satellite clock offset, stations＇ clock offsets and systematic errors were analyzed both theoretically and quantitatively.

关 键 词：卫星导航 精密定轨 钟差 时间同步 伪距 

分 类 号：P228.4[天文地球—大地测量学与测量工程]