| Accuracy Analysis of Geopotential Coefficients Recovered from In-situ Disturbing Potential by Energy Conservation Method |
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| 作者姓名： | ZOU Xiancai LI Jiancheng LUO Jia XU Xinyu |
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| 作者单位： | School of Geodesy and Geomatics 129 Luoyu Road Wuhan 430079 China |
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| 基金项目： | Funded by the National Natural Science Foundation of China （No.40274004）, and the Open Fund of Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, China （No. 06-09）.
The authors are grateful to Prof. CHAO Dingbo for his critical comments and also thank Dr. Dadzie very much for his proof-reading. |
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| 摘 要： | The characteristics of the normal equation created in recovering the Earth gravity model (EGM) by least-squares(LS) adjustment from the in-situ disturbing potential is discussed in detail. It can be co...
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| 关 键 词： | 能量法 扰动位 系数精度分析 最小二乘法 |
| 文章编号： | 1009-5020（2007）04-255-05 |
| 收稿时间： | 2007-09-17 |
Accuracy analysis of geopotential coefficients recovered from in-situ disturbing potential by energy conservation method |
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| ZOU Xiancai LI Jiancheng LUO Jia XU Xinyu.Accuracy Analysis of Geopotential Coefficients Recovered from In-situ Disturbing Potential by Energy Conservation Method[J].Geo-Spatial Information Science,2007,10(4):255-259. |
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| Authors: | Zou Xiancai Li Jiancheng Lou Jia Xu Xinyu |
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| Institution: | School of Geodesy and Geomatics, 129 Luoyu Road, Wuhan 430079, China |
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| Abstract: | The characteristics of the normal equation created in recovering the Earth gravity model (EGM) by least-squares (LS) adjustment
from the in-situ disturbing potential is discussed in detail. It can be concluded that the normal equation only depends on
the orbit, and the choice of a priori gravity model has no effect on the LS solution. Therefore, the accuracy of the recovered
gravity model can be accurately simulated. Starting from this point, four sets of disturbing potential along the orbit with
different level of noise were simulated and were used to recover the EGM. The results show that on the current accuracy level
of the accelerometer calibration, the accuracy of the EGM is not sufficient to reflect the time variability of the Earth’s
gravity field, as the dynamic method revealed.
Funded by the National Natural Science Foundation of China (No.40274004), and the Open Fund of Key Laboratory of Geospace
Environment and Geodesy, Ministry of Education, China (No. 06-09). |
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| Keywords: | energy conservation method disturbing potential least-squares |
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