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| 引用本文： | 刘晓刚,张丽萍,王俊,蒲亭汀.????????????????????????????????????????????[J].大地测量与地球动力学,2012,32(5):103-107. |
| 作者姓名： | 刘晓刚 张丽萍 王俊 蒲亭汀 |
| 作者单位： | 1. 西安测绘研究所,西安710054;地理信息工程国家重点实验室,西安710054 2. 西安测绘研究所,西安,710054 3. 78155部队,成都,610062 |
| 基金项目： | 国家自然科学基金(41174026,41104047,41174017) |
| 摘 要： | ???????????????????????????Tzz????????Txx+Tyy??Tzz-Txx-Tyy???????????????????????????????????????????????в??????????????????????????????????????????????????????????????????????????????????????????????????????????Ч?????????????????????????????????????????????????????????????????????????????????????????????100?????????????????????????????????????????????????????????????????Ч??κ???????????????????????????????????Tzz-Txx-Tyy?????????????Tzz??Txx+Tyy?? |
| 关 键 词： | ????????????? ????????? ??????????? ??г???? GOCE |
ESTABLISHMENT OF HARMONIC ANALYSIS MODELS OF SINGLE COMPONENT AND COMPOSITE COMPONENTS OF DISTURBED GRAVITY GRADIENT TENSOR |
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| Liu Xiaogang,Zhang Liping,Wang Jun,and Pu Tingting.ESTABLISHMENT OF HARMONIC ANALYSIS MODELS OF SINGLE COMPONENT AND COMPOSITE COMPONENTS OF DISTURBED GRAVITY GRADIENT TENSOR[J].Journal of Geodesy and Geodynamics,2012,32(5):103-107. | |
| Authors: | Liu Xiaogang Zhang Liping Wang Jun and Pu Tingting |
| Institution: | 1)Xi’an Research Institute of Surveying and Mapping,Xi’an 7100542)National Key Laboratory of Geo-Information Engineering,Xi’an 7100543)78155 Troops of PLA,Chengdu 610062 |
| Abstract: | The harmonic analysis model of single component Tzz and composite components Txx+Tyy,Tzz-Txx-Tyy of disturbed gravity gradient tensor to compute the Earth’s gravitational field model(EGM) are deduced. The influences of disturbed gravity gradient data in different resolutions and with different errors on the accuracy of EGM are analyzed.Thus, the models established here are validated with simulated data. Results show that the harmonic analysis method could not recover the EGM completely because of the influence of continuation and gridding errors as well as the indetermination of smoothness factor. The effective degree and accuracy of EGM are gradually falling along with the increase of errors. The accuracy of EGM computed by composite components Tzz-Txx-Tyy is the highest while that of the composite components Txx+Tyy is the lowest. |
| Keywords: | Earth’s Gravitational field Model (EGM) harmonic analysis method Satellite Gravity Gradient (SGG) spherical harmonic function GOCE |
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