基于地形和气象要素的GPS对流层延迟插值估算研究  

ESTIMATION OF GPS ZENITH TROPOSPHERIC DELAY BASED ON TERRAIN AND METEOROLOGICAL ELEMENTS

作　　者：刘严萍[1] 张立辉 张飞涟[1] 

机构地区：[1]中南大学土木工程学院,长沙410075 [2]黑龙江省水文地质工程地质勘察院,哈尔滨150030

出　　处：《大地测量与地球动力学》2013年第3期59-63,共5页Journal of Geodesy and Geodynamics

基　　金：湖南省研究生科研创新项目(CX2012B061);河北省教育厅项目(ZH2012060);大地测量与地球动力学国家重点实验室开放基金(SKLGED2013-5-5-E)

摘　　要：为解决InSAR大气校正受SAR影像数量的限制或天气状况影响问题,提出一种新的对流层延迟估算方法——基于地形和气象要素的对流层延迟估算模型,并以北京GPS网为例进行对流层延迟估算模型的构建和对流层延迟估算。结果表明,利用该模型的估算结果与GPS对流层延迟吻合较好,精度基本在mm级,可满足InSAR大气校正的要求。In image and weather order to solve the problem that the InSAR atmospheric correction is limited by the number of SAR conditions, a new tropospheric delay estimation method is proposed, which is based on the terrain and meteorological elements. The zenith tropospheric delay model is constructed and the zenith tropospheric delay is estimated by taking the GPS network in Beijing as an example. The result shows that the precision of the model is similar to the GPS tropospheric delay, which is amounted to mm, and can meet the requirements of InSAR atmospheric correction.

关 键 词：对流层延迟 全球定位系统 BP神经网络 地形要素 气象要素 

分 类 号：P423.31[天文地球—大气科学及气象学]