多源卫星重力场模型精度与频谱分析  

Precision and spectral analysis of multi-source satellite gravity field models

作　　者：朱广彬[1] 常晓涛[1] 周晓青[1] 

机构地区：[1]国家测绘地理信息局卫星测绘应用中心,北京100048

出　　处：《测绘科学》2016年第6期9-13,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41204007);国家高技术研究发展计划项目(2013AA122502);国家重点基础研究发展计划项目(2013CB733302);公益性测绘行业专项(201512012;201412001);国家测绘地理信息局基础测绘科技项目

摘　　要：针对新一代卫星重力探测技术对地球重力场的频谱贡献问题,该文提出了一种基于GPS/水准数据获取多源卫星重力场模型频谱变化特征的方法。采用GPS/水准外符合检验,有效分析评估了多源卫星重力场模型在中国东、西部地区的精度水平。研究结果表明,以CHAMP、GRACE和GOCE卫星为代表的高-低卫星跟踪卫星、低-低卫星跟踪卫星和卫星重力梯度技术,对地球重力场的频谱贡献分别集中在600km以上的长波和中长波、300km以上的中波、200～350km之间的中短波部分。In order to acquire the spectrum contribution of the new generation of satellite gravity exploring technology to the Earth＇s gravity field,a method of extracting the spectrum variation characteristics of multi-source satellite gravity field models based on GPS/leveling data was proposed.The precision of multi-source satellite gravity field models in eastern and western regions were analyzed and evaluated using GPS/leveling data in China.The results showed that,the achievements of the high-low satellite-to-satellite tracking（SST）mode,the low-low SST mode and the satellite gravity gradiometry（SGG）mode with the example of CHAMP,GRACE and GOCE satellites to the Earth＇s gravity field spectrum were concentrated in the long and medium-long wavelength parts above 600 km,the medium wavelength part above 300 km and the medium-short wavelength part from 200 to 350km respectively.Satellite gravity exploring technology was of great value to enhance the precision of gravity field model and make up the lack of gravity field spectrum due to gravity data gap and sparse area.

关 键 词：卫星跟踪卫星 卫星重力梯度 卫星重力 地球重力场模型 大地水准面 频谱分析 

分 类 号：P223[天文地球—大地测量学与测量工程]