| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve reduction of communication cost and reduction of a load of a central station. <P>SOLUTION: An aircraft position measurement system has: a transmission station for transmitting each of a plurality of types of signals to an aircraft; a plurality of reception stations for receiving each of a plurality of types of response signals for each of the plurality of types of signals from the aircraft to generate measurement data by performing decoding processing on the received response signals and transmit the generated measurement data with reception time information attached; and a central station for receiving the plurality of measurement data to measure a position of the aircraft based on the plurality of reception time information attached to the plurality of measurement data and position information of each of the plurality of reception stations. The transmission station transmits each of the plurality of types of signals at the time based on time determined by the central station. Each of the plurality of reception stations sets a time zone based on time determined by the central station as time for transmitting a predetermined type signal, and when receiving a response signal for the predetermined type signal at the time other than the time zone, discards the received response signal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
