Abstract In InSAR data processing, some residual linear phase trend still were left in the flattened interferogram due to the inaccuracy orbit parameters. In order to remove the effects of the residual linear phase trend on final InSAR results, a method to refine the instantaneous frequency estimation of InSAR interferogram and to remove the residual linear trend was introduced. First, the instantaneous frequency of interferogram is estimated with the accuracy of 0.1 fringes with the ChirpZ transform. Secondly, the linear trend is simulated from the instantaneous frequency and used to correct the InSAR interferogram. Finally,simulated and real data are used to test the method. The results show that the proposed method can completely remove the linear trend in INSAR interferogram and will help to improve the accuracy of InSAR greatly.
Zhu Jun,Ding Xiaoli,Xu Bing et al. REFINE METHOD FOR REMOVING THE LINEAR TREND IN INTERFEROGRAM BASED ON FRINGE FREQUENCY TEST[J]. , 2011, 31(3): 138-141.
Zhu Jun,Ding Xiaoli,Xu Bing et al. REFINE METHOD FOR REMOVING THE LINEAR TREND IN INTERFEROGRAM BASED ON FRINGE FREQUENCY TEST[J]. jgg, 2011, 31(3): 138-141.
