顾及系统误差的GEO卫星几何法定轨PDOP值分析  

Study on PDOP of Geometry Orbit Determination for GEO Satellite with Systematic Errors

作　　者：贺凯飞[1] 徐天河[2,3] 

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]武汉大学测绘学院,湖北武汉430079 [3]西安测绘研究所,陕西西安710054

出　　处：《地球科学与环境学报》2010年第2期211-214,共4页Journal of Earth Sciences and Environment

基　　金：国家自然科学基金项目(40604003);高等学校全国优秀博士学位论文作者专项资金资助项目(2007B51);中国博士后科学基金项目(20080430148;200902444)

摘　　要：针对GEO卫星几何法定轨中系统误差对PDOP值的影响进行研究,首先回顾了经典几何法定轨的基本原理,然后根据顾及系统误差的几何法定轨原理推导出PDOP值计算公式,并利用5个跟踪站的模拟数据,计算了多种系统误差情况下PDOP值。结果表明:系统误差对GEO卫星几何法定轨的PDOP值影响很大;采用顾及系统误差的几何法定轨方法可以较好地削弱系统误差对PDOP值的影响;国外布设跟踪站比仅在中国布设跟踪站能更好地削弱系统误差对PDOP值的影响。Effect of systematic error on Position Dilution of Precision（PDOP） of geometry orbit determination for Geostationary Earth Orbit（GEO） satellite was discussed.Firstly,the fundamental principle of classical geometry orbit determination was reviewed;secondly,the formula calculating PDOP was deduced by the method of geometry orbit determination with systematic error;thirdly,PDOP with multi systematic errors was computed by simulated data from five tracking stations.The result showed that the influence of systematic errors on PDOP of geometry orbit determination for GEO satellite was significant;the influence could be efficiently weakened with the method of geometry orbit determination with systematic error;compared with the tracking stations selected only in China,overseas tracking stations selected could weaken the influence of systematic errors on PDOP more efficiently.

关 键 词：GEO卫星 几何法定轨 系统误差 PDOP 跟踪站 

分 类 号：P228.1[天文地球—大地测量学与测量工程]