抄録
Recently, the requirements for accurate positioning for various scientific investigations in the ocean areas are on the increase. At the present time, one of the most effective positioning system to meet these requirements is an application of ocean bottom control network being consist of three or more acoustic transponders.
In a previous report (Yamazaki, 1975), the writer proposed a new technique which determine the geometry on the three transponder network positioning and estimated the accuracy of its solution. There we implicitly assumed that the simultaneous acoustic range measurements are performed from stopped ship. However, it is technically difficult and non-efficient to stop ship at each time.
So this time, considering practical use, the accuracy of the three transponder geometry in the case of measurements from sailing ship are reestimated by the simulation methods using personal computer.
Based on some assumptions,the results obtained show that the accuracy is estimated as about 10cm for ranging accuracy of 10-3 at 3,000m base line of transponder network.
Furthermore, the use of this technique in conjunction with GPS will make it possible to determine the geodetic positions of transponders with the accuracy of about 0.04" for GPS accuracy of 10m.
