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．
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.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1994年第4期487-498,共12页
Chinese Journal of Geophysics
基金
国家科委攀登计划研究课题.
关键词
重力场模型
青藏地区
位系数模型
Regional geopotential model. Residual gravity anomaly field,Elllpsoldal correction, Qinghai-Xizang region.
