Precise Relative Orbit Determination of Twin GRACE Satellites  

作　　者：ZHAO Qile HU Zhigang GUO Jing LI Min GE Maorong 

机构地区：[1]GNSS Research Center, Wuhan University, 129 Luoyu Road, Wuhan 430079, China [2]Department of Geodesy and Remote Sensing, GeoForschungsZentrum (GFZ) Potsdam, Telegrafenberg A17, D14473 Potsdam, Germany

出　　处：《Geo-Spatial Information Science》2010年第3期221-225,共5页地球空间信息科学学报（英文）

基　　金：Supported by the National Natural Science Foundation of China (No. 40874004, No.40504002);the National 973 Program of China (No.2006CB701301);the National 863 Program of China (No. 2006AA12Z326, No. 2007AA12Z345);the 111 Project(No. B07037)

摘　　要：When formation flying spacecrafts are used as platform to gain earth oriented observation, precise baselines between these spacecrafts are always essential. Gravity recovery and climate experiment （GRACE） mission is aimed at mapping the global gravity field and its variation. Accurate baseline of GRACE satellites is necessary for the gravity field modeling. The determination of kinematic and reduced dynamic relative orbits of twin satellites has been studied in this paper, and an accuracy of 2 mm for dynamic relative orbits and 5 mm for kinematic ones can be obtained, whereby most of the double difference onboard GPS ambiguities are resolved.当形成飞时，太空船被用作站台获得土面向的观察，在这些太空船之间的精确基线总是是必要的。严肃恢复和气候实验(优雅) 使命针对印射全球严肃地和它的变化。优雅卫星的精确基线为当模特儿的严肃地是必要的。成双的卫星的运动学、减少的动态相对轨道的决心为动态相对轨道在 2 公里的这份报纸，和精确性被学习了，为运动学的 5 公里能被获得，大多数在 GPS 歧义上的双差别由此被解决。

关 键 词：GRACE gravity field modeling formation flying spacecraft relative orbit determination 

分 类 号：P223.0[天文地球—大地测量学与测量工程] P228.4[天文地球—测绘科学与技术]