| 摘要 |
PURPOSE:To enable the measuring of a moving object at a high accuracy by receiving packet information from a moving object through a second satellite and packet information from a transmitting station through a first satellite to measure a position of the moving object. CONSTITUTION:A synchronous packet Ps with a packet number attached thereto is transmitted from a transmitting station 8 to be received 7 with a receiving station 6 through a first satellite S1 while being received with a terminal 5 of a moving object 5. At this point, the moving object 5 transmits a moving object transmitting packet Pm with time information Tm to the transmission time t2 from the time t1 of reception and a packet number #n added. The receiving station 6 receives the packet Pm from the moving object 4 through the two satellites S2 and S3 to measure the position of the moving object 4 based on the time information Tm and the number #n added and time (interval) information Tl2 between the reception time t3 of the packet Ps received through the satellite S1 and for example, the reception time t4 of a packet Pm2 received from the satellite S2. |
