The CHAMP-only Earth gravity field model EIGEN-2

被引:127
作者
Reigber, C
Schwintzer, P
Neumayer, KH
Barthelmes, F
König, R
Förste, C
Balmino, G
Biancale, R
Lemoine, JM
Loyer, S
Bruinsma, S
Perosanz, F
Fayard, T
机构
[1] Geoforschungszentrum Potsdam, Dept Geodesy & Remote Sensing, D-14473 Potsdam, Germany
[2] GRGS, F-31401 Toulouse, France
来源
INTEGRATED SPACE GEODETIC SYSTEMS AND SATELLITE DYNAMICS | 2003年 / 31卷 / 08期
关键词
D O I
10.1016/S0273-1177(03)00162-5
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
The German small geoscientific satellite CHAMP flies around the Earth since July 2000 in a highly inclined orbit with an altitude of initially 450 km and meanwhile at about 400 kin. From the gravitational orbit perturbations, exploiting GPS-CHAMP satellite-to-satellite tracking and on-board accelerometer data over a time span of altogether six months, a new long-wavelength global gravity field model, called EIGEN-2, has been derived in a German/French effort. Thanks to CHAMPs dedicated orbit configuration, continuous GPS tracking and in-orbit measurement of non-gravitational satellite accelerations, the new CHAMP-only solution provides the geoid and gravity with an accuracy of 10 cm and 0.5 mGal, respectively, at a half wavelength resolution of 550 km. This is an improvement by almost one order of magnitude compared to any multi-satellite pre-CHAMP satellite-only gravity field model. (C) 2003 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1883 / 1888
页数:6
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