Patent ID: 8390505

Claim:
A process for detecting at least one aircraft (AI) circulating in the air space surrounding an airplane (AC), said airplane (AC) comprising a collision avoidance system ( 2 ) able to detect the presence of such an aircraft (AI), said process comprising the following steps: A/ monitoring said air space, by means of said collision avoidance system ( 2 ), so as to detect the presence of an aircraft (AI) and, in case of a detection, determining at least one first position (P) of said aircraft with respect to said airplane (AC); B/ monitoring said air space through the radar detection means ( 3 ) arranged on board said airplane (AC), so as to detect the presence of said aircraft (Al) and, in case of a detection, determining at least one second position (P 2 ) of said aircraft with respect to said airplane (AC); Co/ determining a matching volume (V 1 , V 2 ) centered around at least one of said first and second positions (P 1 , P 2 ); and C/ when said collision avoidance system ( 2 ) and said radar detection means ( 3 ) each detect said aircraft (Al) in said air space, comparing said first position (P 1 ) to said second position (P 2 ), so as to check whether they match, using said determined matching volume (V 1 , V 2 ).