STUDY ON ZENITH TROPOSPHERIC DELAY INTERPOLATION METHODS FOR DIFFERENT TERRAIN
Wang Yong 1,2,3) ;Jiao Jian 1) ;Zeng Qiming 1) ; and Liu Yanping 3)
1)School of Earth and Space Sciences, Peking University,Beijing 1008712)Key Laboratory of Mine Spatial Information Technologies (Henan Polytechnic University, Henan Bureau of Surveying and Mapping), State Bureau of Surveying and Mapping,Jiaozuo 4540003)College of Traffic and Surveying, Hebei Polytechnic University,Tangshan 063009
Abstract：It is one of the key issues to further enhance the accuracy of interferometry that how to effectively improve the atmospheric effects in InSAR. Using GPS technique to correct atmospheric delay of InSAR is the most effective method. From the GPS data of Beijing and Wuhan, the Inverse Distance Weighted and Kriging interpolation methods are adopted to study the effect on tropospheric delay interpolation for different terrain. It is concluded that there are the same effect between Inverse Distance Weighted method and Kriging interpolation method. The effects on tropospheric delay interpolation are different in Wuhan and Beijing. The interpolation effect in Wuhan region with the methods are the same,they amounts to millimeters, while the effects are different from eath other in Beijing,that it can be to millimeter in the flat region, while to centimeter in mountain area. Thus the terrain correction should be made for interpolation in order to apply the atmospheric correction of InSAR with GPS zenith tropospheric delay.
Wang Yong,Jiao Jian ,Zeng Qiming et al. STUDY ON ZENITH TROPOSPHERIC DELAY INTERPOLATION METHODS FOR DIFFERENT TERRAIN[J]. jgg, 2010, 30(第3期): 132-136.
