| 改进的能量守恒方法及其在CHAMP重力场恢复中的应用(英文) |
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| 引用本文： | XU Tianhe HE Kaifei Xi’an Research Institute of Surveying and Mapping, Middle Yanta Road,Xi’an ,China..改进的能量守恒方法及其在CHAMP重力场恢复中的应用(英文)[J].地球空间信息科学学报,2008,11(3):168-173. |
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| 作者姓名： | XU Tianhe HE Kaifei Xi’an Research Institute of Surveying and Mapping Middle Yanta Road Xi’an China. |
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| 作者单位： | Xi'an Research Institute of Surveying and Mapping，1 Middle Yanta Road，Xi'an 710054，China. |
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| 基金项目： | Supported by the National Natural Science Foundation of China （No.40604003, 40474001）. Acknowledgements： We are grateful to the ISDC of the GFZ Potsdam for providing the data and to Gerlach C. and Svehla D. at the TUM for the kinematic orbits. |
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| 摘 要： | An efficient method for gravity field determination from CHAMP orbits and accelerometer data is referred to as the energy balance approach. A new CHAMP gravity field recovery strategy based on the improved energy balance approach IS developed in this paper. The method simultaneously solves the spherical harmonic coefficients, daily Integration constant, scale and bias parameters. Two 60 degree and order gravitational potential models, XISM-CHAMPO1S from the classical energy balance approach, and XISM-CHAMPO2S from the improved energy balance, are determined using about one year＇s worth of CHAMP kinematic orbits from TUM and accelerometer data from GFZ. Comparisons among XISM-CHAMPO1S, XISM-CHAMPO2S, EIGEN-CGO3C, EIGEN-CHAMPO3S, EIGEN2, ENIGNIS and EGM96 are made. The results show that the XISM-CHAMPO2S model is more accurate than EGM96, EIGENIS, EIGEN2 and XISM-CHAMPO1S at the same degree and order, and has almost the same accuracy as EIGEN-CHAMPO3S.
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| 关 键 词： | 能量守恒方法 CHAMP 重力场恢复 应用方法 |
An improved energy balance approach and its application in CHAMP gravity field recovery |
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| Tianhe Xu,Kaifei He.An improved energy balance approach and its application in CHAMP gravity field recovery[J].Geo-Spatial Information Science,2008,11(3):168-173. |
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| Authors: | Tianhe Xu Kaifei He |
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| Institution: | (1) Xi’an Research Institute of Surveying and Mapping, 1 Middle Yanta Road, Xi’an, 710054, China |
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| Abstract: | An efficient method for gravity field determination from CHAMP orbits and accelerometer data is referred to as the energy
balance approach. A new CHAMP gravity field recovery strategy based on the improved energy balance approach is developed in
this paper. The method simultaneously solves the spherical harmonic coefficients, daily integration constant, scale and bias
parameters. Two 60 degree and order gravitational potential models, XISM-CHAMP01S from the classical energy balance approach,
and XISM-CHAMP02S from the improved energy balance, are determined using about one year’s worth of CHAMP kinematic orbits
from TUM and accelerometer data from GFZ. Comparisons among XISM-CHAMP01S, XISM-CHAMP02S, EIGEN-CG03C, EIGEN-CHAMP03S, EIGEN2,
ENIGN1S and EGM96 are made. The results show that the XISM-CHAMP02S model is more accurate than EGM96, EIGEN1S, EIGEN2 and
XISM-CHAMP01S at the same degree and order, and has almost the same accuracy as EIGEN-CHAMP03S.
Supported by the National Natural Science Foundation of China (No.40604003, 40474001). |
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| Keywords: | Earth gravity field model energy balance CHAMP kinematic orbit CLC number P223 |
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