SEARCH RADAR APPARATUS

摘要

Search radar apparatus containing an MTIvideo processing unit provided with: a canceller (2) for generating video signals of moving targets; a zero-velocity filter (3) for generating clutter video signals; a conditional circuit (4) connected to the canceller (2) and the filter (3) for generating per range quant of each radar scan a clutter switching signal if for the range quant the signal value obtained with filter (3) is greater than the signal value obtained with the canceller (2); a combination circuit (95) connected to said filter (3) and the conditional circuit (4) for selecting the clutter video signals present with the clutter switching signals and for determining therefrom a temporary clutter level in each clutter cell and each antenna revolution period; and clutter level indication means (94) connected to the combination circuit (95) for determining a standard clutter level per range-azimuth clutter cell of the radar range with the application of clutter video signals.