Abstract: A process for filtering interferograms obtained from SAR images, acquired on the same area by synthetic aperture radars, comprising the following steps: a) acquiring a series of N radar images (Al . . . AN) by means of a SAR sensor on a same area with acquisition geometries such as to allow re-sampling of the data on a common grid; b) after re-sampling on a common grid, selecting a pixel from the common grid; c) calculating the coherence matrix of the selected pixel, that is estimating the complex coherence values for each possible pair of available images; d) maximizing, with respect of the source vector ?, here an unknown element, the functional: (formula) being R the operator which extracts the real part of a complex number, ?nm the modulus of the element (n,m) of the coherence matrix, k a positive real number, ?nm the phase of the element (n,m) of the coherence matrix, ?n and ?m the elements n and m of the unknown vector ?.