Airborne radar device with a given angular coverage in elevation and in azimuth, comprising a transmission system, a reception system and processing means carrying out target detection and location measurements, said transmission system comprising: - a transmission antenna made up of P linear arrays (111, 112, 113) of radiating elements focusing a transmission beam, said arrays being parallel to one another; - at least two waveform generators (25, 26); - means for amplifying the transmission signals produced by the waveform generator or generators (25, 26); and - means for controlling the transmission signals produced by the waveform generator or generators (25, 26), said means feeding each radiating element with a transmission signal, the radiating elements being controlled for: simultaneously carrying out electronic scanning of the transmission beam in elevation and for coloured transmission in elevation, the first waveform generator delivering a signal at a first frequency F1 and the second waveform generator delivering a signal at a second frequency F2, each transmission array (111, 112, 113) being split into two sub-arrays (23, 24), the radiating elements of the first sub-array being fed with the signal at the first frequency F1 and the radiating elements of the second sub-array being fed with the signal at the second frequency F2, the coloured transmission being obtained by transmitting over the first sub-array at the first frequency F1 and by transmitting over the second sub-array at the second frequency F2, wherein this radar device is characterized in that the reception system comprises a linear array of radiating elements oriented along a direction orthogonal to the linear arrays (11, 111, 112, 113) of the transmission system, the processing means of the reception system calculating, in the elevation plane, a sum channel (Σ) and a difference channel (Δ) according to the single-pulse technique on the basis of the signals received, on the one hand, at the first frequency F1 and, on the other hand, at the second frequency F2. - a transmission antenna made up of P linear arrays (111, 112, 113) of radiating elements focusing a transmission beam, said arrays being parallel to one another; - at least two waveform generators (25, 26); - means for amplifying the transmission signals produced by the waveform generator or generators (25, 26); and - means for controlling the transmission signals produced by the waveform generator or generators (25, 26), said means feeding each radiating element with a transmission signal, simultaneously carrying out electronic scanning of the transmission beam in elevation and for coloured transmission in elevation, the first waveform generator delivering a signal at a first frequency F1 and the second waveform generator delivering a signal at a second frequency F2, each transmission array (111, 112, 113) being split into two sub-arrays (23, 24), the radiating elements of the first sub-array being fed with the signal at the first frequency F1 and the radiating elements of the second sub-array being fed with the signal at the second frequency F2, the coloured transmission being obtained by transmitting over the first sub-array at the first frequency F1 and by transmitting over the second sub-array at the second frequency F2, wherein this radar device is characterized in that the reception system comprises a linear array of radiating elements oriented along a direction orthogonal to the linear arrays (11, 111, 112, 113) of the transmission system, the processing means of the reception system calculating, in the elevation plane, a sum channel (Σ) and a difference channel (Δ) according to the single-pulse technique on the basis of the signals received, on the one hand, at the first frequency F1 and, on the other hand, at the second frequency F2.