摘要
利用不同于Stokes、Molodensky等经典理论的新方法确定了30′×30′全球大地水准面。该方法充分利用了高精度地球重力场模型EGM2008、数字高程模型DTM2006.0以及全球地壳密度模型CRUST2.0。计算的30′×30′全球大地水准面与同分辨率的EGM2008大地水准面及美国、澳大利亚GPS水准数据进行了比较,结果表明,计算大地水准面与截断至360阶的30′×30′EGM2008大地水准面的精度相当,在全球范围,两者差值的标准差为2.9cm;在美国、澳大利亚区域,计算大地水准面的精度分别为28cm和14cm。
In this paper a 30′×30′global geoid has been determined based on a new theoretical method,which is quite different from the classical geoid modeling methods（Stokes method,Molodensky method,etc.）.This new method takes full advantage of the precise Earth gravity field model EGM2008,digital topographic model DTM2006.0 and global crust density model CRUST2.0.The calculated 30′×30′global geoid is compared to the truncated 30′×30′EGM2008 geoid model and validated by GPS/leveling benchmarks（GPSBMs） in the United States and Australia.The results show that the calculated geoid performs at the same level as the EGM2008 geoid,and the standard deviation of their differences is 2.9 cm globally.The accuracy of the calculated global geoid reaches 28 cm in the United States and 14 cm in Australia.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2012年第10期1135-1139,共5页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(40974015
41174011)
国家自然科学基金创新群体资助项目(41021061)
国家自然科学基金海外与港澳学者合作研究基金资助项目(41128003)
