| 区域高阶重力场模型与青藏地区局部位系数模型 |
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| 引用本文： | 陆洋,许厚泽.区域高阶重力场模型与青藏地区局部位系数模型[J].地球物理学报,1994,37(4):487-498. |
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| 作者姓名： | 陆洋 许厚泽 |
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| 作者单位： | 中国科学院测量与地球物理研究所, 武汉 430077 |
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| 基金项目： | 国家科委攀登计划研究课题． |
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| 摘 要： | 根据当今全球模型研究的Ｍｏｌｏｄｅｎｓｋｙ理论，推导了相应的区域高阶重力场模型系数修正公式．考虑了球近似边值条件引起的各种偏差，使用了椭球坐标系，按椭球调和展开．并利用中国青藏地区地面重力资料对原始全球模型ＯＳＵ９１Ａ１Ｆ的高阶部分系数进行修正，获得该地区的局部重力场模型ＱＺ９３Ｇ（完整到３６０阶），它对实测平均重力异常的恢复精度为±１１．８×１０－５ｍ／ｓ２．
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| 关 键 词： | 局部重力场模型 剩余重力异常场 椭球改正 青藏地区 |
| 收稿时间： | 1993-08-12 |
THE REGIONAL MODEL OF HIGH-ORDER GRAVITATIONAL FIELD AND THE POTENTIAL COEFFICIENT MODEL OF THE QINGHAI-TIBET REGION |
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| LU YANC,XU HOU-ZE.THE REGIONAL MODEL OF HIGH-ORDER GRAVITATIONAL FIELD AND THE POTENTIAL COEFFICIENT MODEL OF THE QINGHAI-TIBET REGION[J].Chinese Journal of Geophysics,1994,37(4):487-498. |
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| Authors: | LU YANC XU HOU-ZE |
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| Institution: | Institute of Geodesy and Geophysics, Academia Sinica, Wuhan 430077 |
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| Abstract: | This paper deals with the method for calculating the regional highorder potential coefficient model by using regional gravity data.The formulas,including all systematic corrections for modifying model coefficients,are developed employing an ellipsoldal coordinate system and ellipsoldal harmonics expansion. Based on the derived formulas, the terrestrial gravity anomalies in the Qinghai-Xizang area are used to obtain a regional potential coefficient model QZ93G （completed to degree 360）.The mean anomalies from the QZ93G model have a RMS discrepancy of +11.8× 10-5m/s2 with the terrestrial anomalies.The new model represents a substantial improvement over the OSU91A1F model. |
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| Keywords: | Regional geopotential model Residual gravity anomaly field Elllpsoldal correction Qinghai-Xizang region |
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