Spatial Interpolation Methods for Correcting Atmospheric Effects Using Interferometric SAR
Xu Jia①; Guan Ze-qun①; He Xiu-feng②; Wang Jiang-lin③
①School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China;②Institute of Satellite Navigation & Spatial Information System, Hohai University, Nanjing 210098, China; ③Guangzhou South Surveying and Mapping Instrument Company, Guangzhou 510665, China
Abstract：In this paper, the focusing has been on spatial interpolation in correcting atmospheric effects using Interferometric SAR based on external data. Several factors have been discussed separately by using both simulated data and GPS data. The results indicate that the inverse distance weighted and kriging interpolation methods are more suitable than the function method and statistical method. And the validity of calibration is influenced by the type and quality of external data. When the external data is precise and regular, the result will be the best. Moreover, the improved interpolation methods by incorporating terrain elevation information have proved to be better.
2008, Vol. 30 
