确定全球厘米级精度大地水准面的可能性和方法探讨  

Investigations of the Possibility and Method of Determining Global Centimeter-level Geoid

作　　者：晁定波[1] 申文斌[1] 王正涛[1] 

机构地区：[1]武汉大学测绘学院地球物理系

出　　处：《测绘学报》2007年第4期370-376,共7页Acta Geodaetica et Cartographica Sinica

基　　金：国家自然科学基金(40174004;40574004);国家测绘局测绘科技发展基金(2001-01-02)

摘　　要：阐述确定厘米级精度大地水准面所面临的挑战,评述各种大地水准面的定义,提出一种确定1°×1°厘米级精度全球大地水准面的新思路和新方法:在已知相应厘米级精度全球重力位模型、地形密度分布模型以及平均海面高模型的前提下,利用虚拟压缩恢复法可实现全球1°×1°厘米级精度大地水准面的目标。初步论证实现此目标的可能性和条件,并简要介绍一个模拟实验结果。The challenges for determining the global geoid with the accuracy of centimeter-level are clarified. Various definitions of the geoid are commented. A new approach for determining the global 1°× l° geoid with the accuracy of centimeter-level are further suggested： if it is given a geopotential model with corresponding centimeter-level accuracy, given the Earth shallow layer mass density distribution as well as the mean sea height model with the corresponding accuracy, then, based on the fictitious compress recovery approach, the aim of realizing the global 1°×1° geoid with the accuracy of centimeter-level is possible. The possibilities and conditions for realizing the aim are prehminarily demonstrated, and the results of a simulative test are also introduced in short.

关 键 词：重力位 大地水准面 虚拟压缩恢复法 地表浅层物质密度 

分 类 号：P223[天文地球—大地测量学与测量工程]