确定1°×1°厘米级全球大地水准面的模拟实验  

SIMULATION TEST FOR DETERMINING 1°×1° GLOBAL GEOID WITH CENTIMETER-LEVEL ACCURACY

作　　者：韩建成[1] 申文斌[1] 

机构地区：[1]武汉大学测绘学院,武汉430079

出　　处：《大地测量与地球动力学》2007年第5期38-43,48,共7页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(40574004)

摘　　要：介绍了一种基于全球1°×1°(10-5ms-2级)重力场模型、较高精度地表浅层物质密度分布模型以及平均海面模型,并利用虚拟压缩恢复法确定全球1°×1°厘米级大地水准面的理论方法,阐述了该方法的实施步骤。模拟实验检验结果表明,对于所用地球模型,采用该方法确定1°×1°全球大地水准面可达到厘米级或更优精度。On the basis of a given 1°× 1° global geopotential field model with 10^-5ms^-2 level, a density model of the shallow layer with relatively high accuracy and also an accurate mean sea surface model, a theoretical approach for determining 1°× 1°global geoid with centimeter-level, by use of fictitious compress recovery method, is introduced. The simulative experiments are carried out to test this approach and the results show that, for determi- ning the global geoid at a scale of 1°× 1° of the earth model used here, the accuracy can reach centimeter-level or even better.

关 键 词：大地水准面 地表浅层密度 1°×1°厘米级全球大地水准面 虚拟压缩恢复法 模拟 

分 类 号：P223.0[天文地球—大地测量学与测量工程]