利用CHAMP科学轨道数据和星载加速度计数据反演地球重力场  

Earth's Gravity Field Recovered from CHAMP Science Orbit and Accelerometer Data

作　　者：周旭华[1] 吴斌[1] 彭碧波[1] 许厚泽[1] 

机构地区：[1]中国科学院测量与地球物理研究所,武汉市徐东路340号430077

出　　处：《武汉大学学报（信息科学版）》2006年第2期172-175,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40234039);中国科学院科技创新工程重点资助项目(KJCX2-SW-T1;KJCX3-SW-132);国家863计划资助项目(2002AA639280)

摘　　要：基于卫星动力学理论,采用德国地球科学中心GFZ提供的CHAMP精密轨道数据和星载加速度计数据,反演了36阶地球重力场模型CDS01S。用不同模型之间的位系数差比较模型CDS01S、EIGEN3P、EIGEN1S及EGM96,表明CDS01S模型的位系数最接近于EIGEN3P;比较上述几种模型的位系数精度,表明CDS01S模型的位系数精度高于EGM96;用CDS01S和GGM01C的前30阶位系数分别计算全球2°×2°网格的大地水准面起伏,两者之间的标准偏差为4.7 cm。The earth＇s gravity field model CDS01S up to 36 degrees has been recovered from the post processed science orbits and accelerometer data of GFZ＇s CHAMP satellite. The model that resolves the geoid with an accuracy of better than 4 cm at a resolution of 700 km half-wavelength. By using the degree errors of geopotential coefficients difference to compare the model CDS01S with EIGEN3P, EIGEN1S and EGM96, the result indicates that the CDS01S coefficients are most close to EIGEN3P. Comparing the accuracy of geopotential coefficients in these models, the result indicates the accuracy of coefficients in CDS01S is high er than EGM96. The geoid undulations of CDS01S and GGM01C up to 30 degrees are calculated, the result indicates the standard deviation is 4.7 cm between them.

关 键 词：CHAMP卫星 轨道和加速度数据 地球重力场 大地水准面 

分 类 号：P223[天文地球—大地测量学与测量工程]