摘要
利用澳大利亚高精度的地面重力测量和航空重力数据,对点质量模型方法进行内外符精度检验。结果表明:点质量模型方法内符精度可以达到10-8ms-2量级,在655m高度可以达到±3×10-5ms-2的外符精度。
The self-consistency problem of the point mass model method for approximating the Earth＇ s external gravity field is discussed. Considering the fact that the disturbing gravity cannot be obtained through direct measure- ment at altitudes above the Earth＇ s surface, a solution which made for studying the approximation accuracy of the point mass model method is proposed. That a test of internal and external consistency accuracy based on the ground and airborne gravity observations of Australia was made. Numerical results show that the internal consistency accu- racy is 10^-8ms^ -2, and the external consistency accuracy of the point mass model method at the altitude of 655 m is±3 x lO^-5ms^-2
出处
《大地测量与地球动力学》
CSCD
北大核心
2011年第4期76-79,共4页
Journal of Geodesy and Geodynamics
基金
解放军信息工程大学测绘学院学科基础理论研究基金(T1104)
关键词
自洽性
点质量模型法
扰动引力
航空重力
内外符精度
self-consistency
point mass model method
disturbing gravity
airborne gravity
internal and externalconsistency accuracy
