A method for filtering an interferometric radar acquisition, said method comprising the steps of: - prearrangement of a radar system for carrying out acquisitions of images of a scenario by means of SAR interferometry, said radar system comprising: - at least one radar sensor arranged to emit and receive a radar signal; - a control unit configured to analyse said signal received by said radar sensor by means of interferometric technique; - a screen arranged to show to a user said images of said scenario; - by means of said radar system, periodic acquisition of images S i of said scenario for a number n c of cycles, with i = 1,2,...,n c, each image S i comprising a number n p of pixels P ij having spatial coordinates defined with respect to a predetermined reference system, where P ij is the j-th pixel of the i -th image acquired at the i -th cycle, with j = 1,2,...,n p; said method characterized in that, at each i -th cycle and for each pixel P ij, it is provided an iteration of the steps of: - calculation of a coherence value γ ij arranged to represent the quality of the phase information supplied by a j-th pixel at the i -th cycle; - comparison of said coherence value γ ij with a predetermined minimum coherence value γ min; - interferometric calculation of a displacement value d ij of said pixel P ij, said displacement value d ij being zero in case that in case that γ ij < γ min; - calculation of a cumulative displacement value D ij as the sum of the displacement values d ij in the N cycles preceding said i -th cycle, said cumulative displacement value D ij being calculated according to the equation D ij = ∑ k = i − N i d kj. - prearrangement of a radar system for carrying out acquisitions of images of a scenario by means of SAR interferometry, said radar system comprising: - at least one radar sensor arranged to emit and receive a radar signal; - a control unit configured to analyse said signal received by said radar sensor by means of interferometric technique; - a screen arranged to show to a user said images of said scenario; - at least one radar sensor arranged to emit and receive a radar signal; - a control unit configured to analyse said signal received by said radar sensor by means of interferometric technique; - a screen arranged to show to a user said images of said scenario; - by means of said radar system, periodic acquisition of images S i of said scenario for a number n c of cycles, with i = 1,2,...,n c, each image S i comprising a number n p of pixels P ij having spatial coordinates defined with respect to a predetermined reference system, where P ij is the j-th pixel of the i -th image acquired at the i -th cycle, with j = 1,2,...,n p; - calculation of a coherence value γ ij arranged to represent the quality of the phase information supplied by a j-th pixel at the i -th cycle; - comparison of said coherence value γ ij with a predetermined minimum coherence value γ min; - interferometric calculation of a displacement value d ij of said pixel P ij, said displacement value d ij being zero in case that in case that γ ij < γ min; - calculation of a cumulative displacement value D ij as the sum of the displacement values d ij in the N cycles preceding said i -th cycle, said cumulative displacement value D ij being calculated according to the equation D ij = ∑ k = i − N i d kj.