The Radar Analysis Support System for Sites (RASS-S) is a radar manufacturer-independent system for evaluating the different elements of a radar by connecting to signals which are already available and this under operational conditions.

The scientific approach of the RASS-S system produces a top down analysis of all the elements in the radar chain, verifying the performance of each element separately in the operational environment of the radar: from the RF signals at the antenna down to the serial radar data output.