GOCE地球重力场模型在青藏地区的评价及分析  

Evaluation and Analysis of GOCE Earth Gravity Field Model in Qinghai-Tibet Region

作　　者：高春春[1,2] 陆洋[1] 张子占[1,3] 史红岭[1,4] 杜宗亮[1,2] 朱传东[1,2] 

机构地区：[1]中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室,湖北武汉430077 [2]中国科学院大学,北京100049 [3]美国得克萨斯大学空间研究中心,德克萨斯州奥斯汀78759 [4]极地测绘科学国家测绘地理信息局重点实验室,湖北武汉430000

出　　处：《测绘学报》2014年第1期21-29,共9页Acta Geodaetica et Cartographica Sinica

基　　金：国家973计划(2013CB733301;2012CB957703);国家自然科学基金(41274025;41174064;41021003;40904020);大地测量与地球动力学国家重点实验室自主项目(Y309511052);中国科学院测量与地球物理研究所重要方向项目(Y309451048);极地测绘科学国家测绘地理信息局重点实验室开放基金(201204);国家海洋局极地科学重点实验室开放研究基金(KP201202)

摘　　要：分别采用青藏地区的GPS/水准和重力异常实测数据对GOCE重力场模型进行外部测试,并在重力异常验证过程中引入一种新的滤波方法。验证结果表明在青藏地区GOCE重力场模型相比其他系列模型的优势在于中波段。同时,探讨GOCE重力场模型与其他系列模型在青藏地区主要差异值的空间分布以及首次利用统计分析方法找出模型之间主要差异值的阶次分布。得出如下结论:①模型之间的较大差异值在空间水平方向上主要分布在喜马拉雅山脉、天山等地形起伏较大的区域;②在垂直方向上主要集中在岩石圈。The precision of the GOCE gravity field models in Qinghai-Tibet area is tested by GPS- leveling and gravity anomaly data. And a new filter method is introduced as a reference in the course of gravity testing. The results show that the medium order of GOCE models is better than other typical models in Qinghai-Tibet area. The next, the differences between GOCE-only model and the other three models are computed respectively in terms of geoid and gravity anomaly in Qinghai-Tibet region. Then the spatial and the field sources depth distribution which is first derived from statistic analysis method of the big difference are discussed. Based on the calculation results, some conclusions have been drawn as follows, （1） in the horizontal direction, the obvious difference between the GOCE models and other typical models appear in the region where landform is complex such as Himalayas, Tianshan, et al;（2） in the downwards direction, the large difference focus on the lithosphere.

关 键 词：GOCE 地球重力场模型 GPS 水准 重力异常 青藏地区 场源深度 岩石圈 

分 类 号：P228[天文地球—大地测量学与测量工程]