不同星历下低轨卫星轨道精度分析  

Accuracy analysis of LEO satellite orbit determination based on different ephemeris

作　　者：吴琼宝 赵春梅[2] 田华[1] 

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590 [2]中国测绘科学研究院,北京100830

出　　处：《导航定位学报》2017年第4期21-24,共4页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41274018);科技部基础性工作专项(2015FY310200)

摘　　要：针对卫星星历的时效性差异导致低轨卫星精密轨道获取滞后的问题,分析IGS组织发布的超快速星历IGU、快速星历IGR和事后精密星历IGF以及广播星历确定的CHAMP卫星轨道的精度特征:采用SLR数据检核GFZ快速科学轨道和4种星历的定轨结果,IGF和IGR星历定轨结果的视向精度与GFZ快速科学轨道基本一致,IGU星历定轨结果稍差一些,广播星历定轨结果视向精度为30~40cm;将4种星历定轨结果与GFZ快速科学轨道进行对比,IGF和IGR星历定轨的径向、切向和法向精度为6~8cm,IGU预报部分定轨径向、切向和法向精度均为9cm左右,广播星历定轨精度优于40cm。结果表明,IGR和IGU星历能够替代IGF星历达到同样的定轨效果。In order to solve the problem of the time delay in low-earth satellite orbit determination caused by the difference of satellite ephemeris,the paper analyzed the precision characteristics of CHAMP satellite orbit issued by IGS using the ultrarapid ephemeris IGU,rapid ephemeris IGR,final precise ephemeris IGF and broadcast ephemeris:compared with SLR data,it was showed that the accuracy of the satellite orbit determined by IGF and IGR ephemeris was basically the same with the rapid science orbit from GFZ,while that by IGU ephemeris were slightly worse,and that from broadcast ephemeris was 30~40cm;regarding the rapid science orbit from GFZ as reference,the radial,tangential and normal accuracy of orbiting from IGF and IGR ephemeris was 6~8cm,that of IGU ephemeris was about 9cm,and that of broadcast ephemeris was better than40 cm.Results showed that the IGR and IGU ephemeris could be used to replace the IGF ephemeris for achieving the same accuracy in orbit determination.

关 键 词：简化动力学 站星距 卫星激光测距 CHAMP卫星 星历 

分 类 号：P228.4[天文地球—大地测量学与测量工程]