大地测量与地球动力学2017，Vol.37Issue(7)：732-736,5.DOI:10.14075/j.jgg.2017.07.012
综合无奇点根数和坐标旋转的广播星历拟合及其性能评估
The Broadcast Ephemeris Fitting Algorithm Combining No Singularity Orbital Elements with Coordinate Rotation and Its Performance Evaluation
摘要
Abstract
No singularity orbital elements combination with coordinate rotation is applied to 18-parameter ephemeris fitting model for GEO satellites in this article,which synchronously solve the singularity problem caused by small eccentricity and small inclination.Based on one year data of five Beidou GEO satellites in orbit,the fitting accuracy and stability are analyzed,and during the eclipse the fitting accuracy is quantitatively analyzed.Finally aiming at parameter's exceeding limitation,the range of variation of parameters between 55° and 5° rotation with X axis is compared.The results show that in 2-4 h fitting arc the maximum fitting error for five GEO satellites is of only 3 cm,and the number of iterations is up to 5 times.The longer the fitting arc the worse the accuracy,and the longer the fitting arc the fewer iterations.During the eclipse,the fitting accuracy gets worse.The range of variation of parameters of 55° rotation with X axis is reduced by one order of magnitude compared with 5° rotation with X axis.There are no parameters exceeding limitation in the overall year.关键词
北斗卫星导航系统/广播星历拟合/无奇点根数/GEO/地影Key words
BDS/ephemeris fitting/non-singular orbital elements/GEO/eclipse分类
天文与地球科学引用本文复制引用
常志巧,胡小工,黄华,胡光明,李晓杰,唐成盼,董恩强..综合无奇点根数和坐标旋转的广播星历拟合及其性能评估[J].大地测量与地球动力学,2017,37(7):732-736,5.基金项目
国家自然科学基金(41204022,41574029,41274043) （41204022,41574029,41274043）
上海市空间导航与定位技术重点实验室开放基金(14DZ2276100).National Natural Science Foundation of China,No.41204022,41574029,41274043 （14DZ2276100）
Open Fund of Shanghai Key Laboratory of Space Navigation and Position Techniques,No.14DZ2276100. （）
