But why?..I must say, I had many and great problems with the normal steps from interferograms, I asked for the help of “@ABraun” and the problem was not solved, You can check here: Problem with the final steps of interferometry I was totally frustrated. But someone suggested me make the correction after the goldstein filtering, just for try, and since then all my interferograms have logic, I can detect landslide, flows and deformation correctly I’ve make hundreds of interferograms since that moment, and now all my afirmations from interferometry have sense …So can you explain me please. Why the last step must be the geometric correction? is the only way? or is a very good suggestion?