利用多元回归方法改正对流层延迟插值误差  

CORRECTION OF INTERPOLATION FROM CALCULATION OF TROPOSPHERIC DELAY WITH MULTIPLE REGRESSIONS METHOD

作　　者：孙晓[1] 张立辉[2] 王勇 杨晶[4] 

机构地区：[1]中南大学土木工程学院,长沙410083 [2]河北联合大学矿业工程学院,唐山063009 [3]河北省地震工程研究中心,唐山063009 [4]河北工程技术高等专科学校水利工程系,沧州061001

出　　处：《大地测量与地球动力学》2012年第B08期98-102,共5页Journal of Geodesy and Geodynamics

基　　金：河北省自然科学基金(D2010000921)

摘　　要：直接利用克里金插值得到的对流层延迟在地形变化起伏大的地区效果不好,提出利用多元回归方法改正克里金直接插值所带来的插值误差。以美国南加州GPS网为例,对海拔差异不同的测区分别进行实验。在具有不同改正因子的方程中,同时具有经、纬度、海拔因子的方程具有较其他方程更好的改正效果,在测站海拔分布差异较小的测区(小于500 m),该方法对插值误差有较好的改正效果,精度达到厘米级,甚至毫米级。Seeing that the effect of good in undulating terrain areas, so the the interpolation of tropospheric delay with available Kriging method is not method of multiple regression to correct the errors of Kriging interpolation was proposed. The experiments, as example, taking the data of Southern California GPS network were carried out in different elevation areas. Among the equations of different correction factors, the equation including the factors of longitude, latitude and altitude has better effect than other equations. In the areas of elevation difference of no more than 500 meters, the accurcy with this method can reach to centimeters level, even milimeters level.

关 键 词：对流层延迟 插值 克里金方法 多元回归 改正因子 

分 类 号：P207[天文地球—测绘科学与技术]