| 摘要 |
PROBLEM TO BE SOLVED: To provide a radar link system capable of acquiring positional information on an aircraft from an information source other than an air-traffic control station.SOLUTION: In a radar link system 10, a plurality of interrogation signals transmitted by an SSR transmitter-receiver 12 are received by using a first receiving apparatus 21 to generate an interrogation data set having a time stamp of a reception time of the interrogation signals, and a plurality of response signals outputted in response to the interrogation signals by a transponder 19 of an aircraft are received by using a second receiving apparatus 40 to generate a response data set having a time stamp of reception time of the response signals. Then, interrogation data and response data corresponding to each other are paired on the basis of the reception time, and based on the respective reception time and the like of the paired interrogation data and response data, an elliptical sphere is identified where the aircraft can be positioned. Further, an aircraft position in the elliptical sphere is obtained from a flight altitude extracted from the response signals, and from a direction of an antenna 12A of the SSR transmitter-receiver 12 that is identified on the basis of a change in reception intensity of the interrogation signals. |
