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.
出处
《测绘学报》
EI
CSCD
北大核心
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)
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
geopotential
geoid
fictitious compress recovery approach
Earth shallow layer mass density
