What is the PS Technique?
The PS Technique (Permanent Scatterers Technique) is an advanced satellite technology which permits to measure very precisely movements (in the Earth-satellite direction) of the ground surface using radar images. Even movements of 0.1 millimeters per year can be measured. This is possible because the phase of the radar signal emitted by the satellite sensor and reflected from the ground is proportional to the distance between the satellite sensor and the point on the ground from which the signal is reflected. The PS Technique was developed at the Polytechnic University of Milan (POLIMI) and was patented in 2000. It is the result of more than 10 years of research of the SAR group at POLIMI.
