高阶地球重力场模型的评价及其优选  

Evaluation and optimal selection of high-order earth's gravity field models

作　　者：邱斌[1] 朱建军[1] 乐科军[1] 

机构地区：[1]中南大学信息物理工程学院,长沙410083

出　　处：《测绘科学》2008年第5期25-27,24,共4页Science of Surveying and Mapping

基　　金：地球空间环境与大地测量教育部重点实验室开放基金资助项目(课题编号:07-08)

摘　　要：采用"移去-恢复"技术确定大地水准面,需要一个全球重力场模型作为参考场。本文采用基于模糊集合理论的最大隶属度原则,通过某试验区的33个GPS水准点的实测大地水准面差距与模型大地水准面差距的比较分析,从国际重力场服务提供的EGM96、EIGEN-CG01C、EIGEN-CG03C、GFZ93A、GFZ96、OSU91A、PGM2000A等七个高阶全球重力场模型中,选择OSU91A作为该地区最优的参考重力场模型。While the ＂Remove -Restore＂ technology is applied to determine a geoid, an Earthg gravity field model regard as a referenced Geo - potential model is very essential. Here, after comparing and analyzing these actual modelg geordal undulations of 33 GPS/leveling points, OSU91A is the preferable geopotential model of the test area according to maximum membership principle based on fuzzy set theory. The optimal model is selected from Seven high - order geo - potential models provided by IGFS （International Gravity Field Service）, such as EGM96, EIGEN -CG0IC, EIGEN -CG03C, GFZ93A, GFZ96, OSU91A and PGM2000A.

关 键 词：大地水准面差距 GPS水准 地球重力场模型 优选 模糊集合理论 

分 类 号：P223[天文地球—大地测量学与测量工程]