An interferogram selection method based on structure function
Aiming at the blind problem of interferograms screening existing in the temporal-spatial baseline thresholding method most commonly used in time series InSAR(TS-InSAR)processing,by introducing structural function,two parameters built upon the structure function(SF)of the wrapped interferogram phase were employed to evaluate the quality of the interferogram,which was used for interferograms selecting,and could select more high-quality interferograms comparing with the traditional temporal-spatial baseline thresholding method.The same amount of interferograms were selected with the SF parameters method,and the temporal-spatial baseline thresholding method,respectively,two kinds of ground deformation monitoring results were obtained,and the accuracy was verified by leveling data.The result showed that the deformation rate obtained by SF method was more accurate,the standard deviation of the difference from the leveling data was 5.58 mm/a,and the deformation accuracy was improved by 35.57％comparing with the temporal-spatial baseline thresholding method,which verified the effectiveness of SF method in interferograms selecting.
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