Earth Gravity Field Recovered from CHAMP Science Orbit and Accelerometer Data  

作　　者：ZHOU Xuhua WU Bin PENG Bibo XU Houze 

机构地区：[1]Chinese Academy of Sciences, 340 Xudong Street, Wuhan 430077 ,China [2]不详

出　　处：《Geo-Spatial Information Science》2006年第4期250-254,共5页地球空间信息科学学报（英文）

摘　　要：The earth gravity field model CDS01S of degree and order 36 has been recovered from the post processed Science Orbits and on-board accelerometer data of GFZ’s CHAMP satellite. The model resolves the geoid with an accuracy of better than 4 cm at a resolution of 700 km half-wavelength. By using the degree difference variances of geopotential coefficients to compare the model CDS01S with EIGEN3P, EIGEN1S and EGM96, the result indicates that the coefficients of CDS01S are most close to those of EIGEN3P. The result of the comparison between the accuracies of geopotential coefficients in the above models, indicates that the accuracy of coefficients in CDS01S is higher than that in EGM96.The geoid undulations of CDS01S and GGM01C up to 30 degrees are calculated and the standard deviation is 4.7 cm between them.The earth gravity field model CDS01S of degree and order 36 has been recovered from the post processed Science Orbits and on-board accelerometer data of GFZ＇s CHAMP satellite. The model resolves the geoid with an accuracy of better than 4 cm at a resolution of 700 km half-wavelength. By using the degree difference variances of geopotential coefficients to compare the model CDS01S with EIGEN3P, EIGEN1S and EGM96, the result indicates that the coefficients of CDS01S are most close to those of EIGEN3P. The result of the comparison between the accuracies of geopotential coefficients in the above models, indicates that the ac- curacy of coefficients in CDS01S is higher than that in EGM96. The geoid undulations of CDS01S and GGM01C up to 30 degrees are calculated and the standard deviation is 4.7 cm between them.

关 键 词：CHAMP satellite accelerometer and orbit data Earth gravity field geoid CLC NUMBER P223 

分 类 号：P223[天文地球—大地测量学与测量工程]