Solutions The collision avoidance system in order to use by the aircraft is offered. This system one which is arranged on the aircraft has profile antenna array at least low. This array has plural horns, at least one polar horn and plural 45 degree horns and plural equator horns are included in the said plural horns. The transmission/reception probe is connected to each horn. The transmission/reception probe transmits the electromagnetic wave, in order to receive the echo signal which is reflected from the obstacle which becomes threat, is constituted. As for plural transmissions/reception module, it forms the electromagnetic wave for transmission, in order to receive the echo signal, it is constituted. In order to offer the output signal where the processor which is connected to plural transmissions/reception module, controls the transmission of the electromagnetic wave from horn, includes the information regarding the obstacle the echo signal is processed. Selective figure Figure 5
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