METHOD AND APPARATUS FOR MONITORING SURFACE DEFORMATIONS OF A SCENARIO

A method for monitoring surface deformations of a scenario by means of differential interferometry technique, said method comprising the steps of prearranging a radar sensor comprising at least one transmitting antenna and a receiving antenna arranged to transmission and acquisition of radar signals, said radar sensor arranged to move along a planar trajectory y having centre 0; defining a reference system S having origin in said centre 0; acquiring by SAR technique said scenario by means of handling said radar sensor along said planar trajectory y, said radar sensor being configured in such a way that the radiation pattern of said antennas is oriented radially with respect to said centre 0, said acquisition occurring at points of acquisition s i arranged on said trajectory y, obtaining a plurality of data for each point of acquisition s i ,- defining a plurality of target points t i of said scenario, the three-dimensional position of each target point t i being definable by means of spherical coordinates (ρ ί ,θ i ,β i ) referring to said reference system S, being known the values of said coordinates ρ ί and θ i . The method further comprises a step of three-dimensional determining of said target points t i by the steps of focusing at a first height of acquisition h a 1 each target point t i with respect to its own position considering a value of β i predetermined and equal to β 0, focusing at a second height of acquisition h a 2 ≠ h a 1 each target point t i with respect to its own position considering a value of β i predetermined and equal to β 0, controlling, by means of interferometric technique, said focusings at the height of acquisition h a 1 and h a 2 obtaining a value of said coordinate β i for each target point. The method further comprises a step of global focusing each target point t i with respect to its own three- dimensional position definable by said spherical coordinates (ρ ί ,θ i ,β i ), obtaining a first focused radar datum, said step of focusing being obtained, for each target point t i , by analyzing data obtained at each point of acquisition s i wherein said target point t i is detectable. L'invention concerne un procédé destiné à surveiller des déformations de surface d'un scénario au moyen d'une technique d'interférométrie différentielle, ce procédé comprenant les étapes suivantes consistant à : pré-agencer un capteur radar comprenant au moins une antenne d'émission et une antenne de réception agencées pour émettre et acquérir des