抄録
Institute of Industrial Science, University of Tokyo, has started the development of new-generation seafloor geodetic observation system. Central idea of this new system is to utilize technique of underwater robotics in place of using a research vessel that has been used in the current observation system. This new system will give us opportunities for observation with choosing favorable conditions of the sea and GPS satellite distribution, as well as much more frequent observations and flexible planning of observation in response to sudden geodetic events. The trials with the prototype of the new observation system have been conducted in Sagami Bay. The new system could locate the position of the seafloor transponder with the root mean square of the travel time (two-way) of 0.06 ms which corresponds to 4-5 cm in position. This indicates that the new system will reach to the higher level in performance than the current system in the near future. This result encourages us to move ahead on the completion of the new system.
