Decoherence recovery method of coseismic deformation field：Taking the 2009 L′Aquila M_W6.3 earthquake as an example

In SAR interferometry, interference coherence is an important evaluation criterion for the quality of local interference fringes. However, due to the influence of various sources of decoherence, decoherent phenomena appear, which may lose important deformation data. In this paper, we first obtain the coseismic deformation field of the 2009 L′Aquila M_W6.3 earthquake with the two scenes of ENVISAT ASAR. After preprocessing the data, we interpolate the coseismic deformation field of the L′Aquila earthquake using the moving window Kriging method, with a result that the decoherence area of the deformation map is restored, and then the co-seismic deformation field obtained by the forward and inversion is used to compare and analyze the interpolation results with the previous step. The results show that the interpolation results are in good agreement with the inversion results in the meizoseismal area, which verifies the reliability of the moving window Kriging interpolation method to restore the decoherence, and shows that the interpolation method can be used to realize the decoherence recovery of the coseismic deformation field. Therefore, it has important reference significance for the research on the recovery of remote sensing image data with decoherence phenomenon.