Comparison of Present SST Gravity Field Models  

作　　者：LUO Jia SHI Chuang ZOU Xiancai WANG Haihong 

机构地区：[1]School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

出　　处：《Geo-Spatial Information Science》2006年第3期175-179,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.40574005 ; No.40304001 ; No.40374006 ; No.40234039) .

摘　　要：Taking the main land of Europe as the region to be studied, the potential of the new satellite gravity technique: satellite-to-satellite tracking (SST) and improving the accuracy of regional gravity field model with the SST models are investigated. The drawbacks of these models are discussed. With GPM98C as the reference, the gravity anomaly residuals of several other models, the latest SST global gravity field models (EIGEN series and GGM series), were computed and compared. The results of the comparison show that in the selected region, some systematic errors with periodical properties exist in the EIGEN and GGM’s S series models in the high degree and order. Some information that was not shown in the classic gravity models is detected in the low and middle degree and order of EIGEN and GGM’s S series models. At last, the effective maximum degrees and orders of SST models are suggested.Taking the main land of Europe as the region to be studied, the potential of the new satellite gravity technique： satellite-to-satellite tracking （SST） and improving the accuracy of regional gravity field model with the SST models are investigated. The drawbacks of these models are discussed. With GPM98C as the reference, the gravity anomaly residuals of several other models, the latest SST global gravity field models （EIGEN series and GGM series）, were computed and compared. The results of the comparison show that in the selected region, some systematic errors with periodical properties exist in the EIGEN and GGM＇s S series models in the high degree and order. Some information that was not shown in the classic gravity models is detected in the low and middle degree and order of EIGEN and GGM＇s S series models. At last, the effective maximum degrees and orders of SST models are suggested.

关 键 词：satellite-to-satellite tracking gravity field CHAMP GRACE 

分 类 号：P223[天文地球—大地测量学与测量工程]