GOCE地球重力场模型在青藏地区的评价及分析

测绘学报 ›› 2014, Vol. 43 ›› Issue (1): 21-29.

GOCE地球重力场模型在青藏地区的评价及分析

高春春陆洋张子占史红岭杜宗亮朱传东

中国科学院测量与地球物理研究所

收稿日期:2012-11-05 修回日期:2013-12-04 出版日期:2014-01-20 发布日期:2014-01-20
通讯作者: 高春春 E-mail:gaochun19870111@163.com
基金资助:
国家重点基础研究发展计划(973计划);国家自然科学基金面上项目;国家重点基础研究发展计划（973计划）;国家自然科学基金

Evaluation and analysis of GOCE earth gravity field model in Qinghai-Tibet region

Received:2012-11-05 Revised:2013-12-04 Online:2014-01-20 Published:2014-01-20

摘要/Abstract

摘要：

2009年GOCE卫星升空以后，卫星重力梯度数据参与解算的GOCE系列重力场模型已有多家研究机构相继公布。本文分别采用青藏地区的GPS/水准和重力异常实测数据对GOCE重力场模型进行了外部测试，并在重力异常验证过程中引入了一种新的滤波方法，验证结果表明在青藏地区GOCE重力场模型相比其它系列模型的优势在于中波段。同时，探讨了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：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，在垂直方向上主要集中在岩石圈。

关键词: GOCE, 重力场模型, GPS/水准, 重力异常, 青藏地区, 场源深度, 岩石圈

Abstract:

The Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) mission has provided several products of earth gravity field models computing by satellite gravity gradiometry (SGG) since its launch in 2009. In this paper, 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 test 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 source 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: 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; in the downwards direction, the large difference focus on the lithosphere.

Key words: GOCE, earth gravity field model, GPS-leveling, gravity anomaly, Qinghai-Tibet region, depth of field sources, lithosphere

中图分类号:

P312.1

高春春陆洋张子占史红岭杜宗亮朱传东. GOCE地球重力场模型在青藏地区的评价及分析[J]. 测绘学报, 2014, 43(1): 21-29.

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