Phase Unwrapping for Interferometric SAR Using

We develop a new algorithm for interferometric SAR phase unwrapping based on the rst Green's identity with the Green's function representing a series in the eigenfunctions of the two-dimensional Helmholtz homogeneous diierential equation. This provides closed-form solutions using one-or two-dimensional fast Fourier transforms. The algorithm is elaborated using adaptive regularization of the interferometric phase gradient estimation. To diminish underestimation of the unwrapped phase underestimation typical of the global phase unwrapping algorithms, the bias in the measured interferometric SAR phase is calculated in terms of the probability density function of the error in the processed interferometric SAR phase.