| 摘要 |
PURPOSE:To enable correction of station position detection using a satellite without using a manual operation in unavailable cases by memorizing the self- position detection information detected using a satellite and calculating with direction/distance detection by a self station means based on the memory in case of unavailable use of the satellite. CONSTITUTION:By receiving the waves from GPS (geodetic position detection) 11, 12, 13 with a receiver 22, the information on the longitude and latitude measured with this is input to an arithmetic control means 23 to calculate the present position and the result is contained in an internal memory. When the waves from GPS 11, 12, 13 are not able to receive, the moving direction and distance are calculated at every determined time by obtaining signals from a direction detection means 28 and a distance detection means 29, and the results are added as relative displacement to the position information contained in the memory in the means 23. The calculated results are recontained. When called by a moving station 14, it sends response signals through the means 23 and a modem 24 etc. to a command station 15. Therefore, even in the case a multitude of waves does not come, the exact position of the moving station 14 is surveyed by the command station 15. |
