GPS卫星钟差及观测数据采样间隔对LEO卫星定轨精度影响  

Impact of Sample Rate of GPS Satellite Clock and Observation Data on LEO GPS-Based Precise Orbit Determination

作　　者：田英国[1] 郝金明[1] 陈明剑[1] 于合理[1] 衡培深 TIAN Yingguo;HAO Jinming;CHEN Mingjian;YU Heli;HENG Peishen(School of Navigation and Aerospace Engineering, Information Engineering University, Zhengzhou 450001, China;The Yellow River Bureau of Surveying and Mapping, Zhengzhou 450000, China)

机构地区：[1]信息工程大学导航与空天目标工程学院,河南郑州450001 [2]黄河水文勘察测绘局,河南郑州450000

出　　处：《武汉大学学报（信息科学版）》2017年第12期1792-1796,共5页Geomatics and Information Science of Wuhan University

摘　　要：针对GPS卫星钟差及观测数据间隔对LEO卫星运动学和约化动力学定轨的影响问题进行了分析,并使用CODE(the Center for Orbit Determination in Europe)30s、5s间隔GPS卫星钟差分别进行了30s和10s间隔观测数据的LEO卫星定轨实验。结果表明,使用5s间隔卫星钟差(10s间隔观测数据)相比30s间隔卫星钟差(30s间隔观测数据)进行GRACE卫星精密定轨,约化动力学定轨精度提高了16%,运动学定轨精度提高了8.8%;使用30s间隔卫星钟差和10s间隔观测数据的定轨精度最低;对于30s间隔观测数据,使用30s或5s间隔卫星钟差的定轨精度基本一致。The influence of GPS precise clock and observation data sampling internal on LEO kinematic and reduced-dynamic precise orbit determination（POD）was analyzed.The several experiments of LEO POD were carried out respectively by using the 30 sor 5 ssampling interval GPS precise clock from CODE and the 30 sor 10 sGPS observation data.The results show that 5 sGPS clock and 10 s observation data comparing with 30 sclock and 30 sobservation data,the accuracy of reduced-dynamic POD is improved by 16%,and the kinematic POD is 8.8%.The accuracy of LEO POD is the worst by using 10 sobservation data and 30 sGPS clock.For 30 sobservation data,the accuracy of LEO POD by using 30 sGPS clock is consistent with 5 sGPS clock products from CODE.

关 键 词：GPS卫星精密钟差 采样间隔 LEO卫星精密定轨 

分 类 号：P228.41[天文地球—大地测量学与测量工程]