Method and device for the surveillance of an unstable site

摘要

The method uses a radar (1) transmitter/receiver to monitor the site. The reflected echoes from a point in the site are processed so as to determine a separation distance. Several reflecting points (R1 - R4) are monitored and the distances from these points to the radar dish are determined. Weather effects are compensated for by correcting the phase of the echo signal, as a function of a measure of the attenuation. A pulse type radar is used, and the distance is determined by means of several operations. These include processing the echo signal so as to deduce its delay with respect to the transmission of a distance value. A synthesised response pulse and/or a hyper-resolution processing is then applied, and the echo signal phase is analysed.