Method for filtering the ground and/or sea clutter echoes intercepted by an airborne radar, and radar implementing such a method

A method of filtering in a radar reception chain of the ground and/or sea clutter echoes intercepted by the sidelobes of an airborne radar, the said echoes being picked up in the distance-speed domain, the said method being wherein it comprises:

• a step of producing a mask, in the distance-speed plane, overlying the zone of detection of the ground and/or sea clutter echoes picked up by the said sidelobes, the said zone being determinable by the antenna parameters of the said radar, the waveform emitted by the said radar and the environmental context of the said radar, all the points of the said distance-speed plane which are covered by the said mask being assigned a characteristic which is specific to the said mask;
• a step of filtering the received echoes, in which the echoes covered by the said mask are rejected from the radar reception processing.