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.
出处
《大地测量与地球动力学》
CSCD
北大核心
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)
关键词
对流层延迟
插值
克里金方法
多元回归
改正因子
tropospheric delay
interpolation
Kriging method
multiple regressions
correction factor
