4:45 PM - 5:00 PM
[HDS19-24] An improvement of the antenna installation mechanism for satellite communication of the GPS tsunami meter
Keywords:GPS tsunami meter, ETS-VIII, satellite data transmission
Then, a satellite data transmission will be the solution. If satellite data transmission is possible, the data have not to be sent to the area nearest to the coast, which allows us that the data can be safely recorded without interruptions due to earthquakes and/or tsunamis. The Japanese engineering test satellite (ETS-VIII) was used for the purpose of data transmission. The data that was obtained on the buoy was transmitted to the land base and was shown on a webpage in real-time, successfully.
However, the data transmission capability is still a problem as it varies depending on the wave height. As we used a planer antenna for single transmission and acquisition, it has a directional property depending on zenith angle. If the buoy inclines larger, the gain of signal gets lower and the frame error rate increases. The antenna installation mechanism for making this change small was made as an experiment, and a small change compared with the fixed mechanism. As the effective function having been checked by this experiment, a practical apparatus is due to be taken.
The experiment was supported the budget of the head of Earthquake Research Institute of the University of Tokyo.