TSUNAMI
MONITORING SYSTEM
USING RTK - GPS AND GPS BUOY
A new
tsunami observation system has been developed,
which employs the RTK _ GPS technique to detect a
tsunami before it reaches the coast.
The system consists of dual - buoys : The support - buoy,
which is sensitive to wind waves, and the sensor - buoy,
is of a spar - type and is insensitive to wind - waves. Both
buoys are equipped with a GPS antenna. An experiment
using this system was carried out for about nine days in
March 1999. Observation data were monitored at the onshore
base station. The results
showed that hourly avrage data is
consistent with ocean tides for both buoys.
The sensor - buoy was found not to respond much to wind
waves compared to the support - buoy.
Thus, it may be preferable to use a spar - type buoy for
detecting a tsunami efficiently.
Further more, a simple frequency analysis showed that
a tsunami could be easily separated from higher frequency
wind waves if tsunami is superimposed on regular wind .
A new tsunami observation system has been developed,
which employs the RTK _ GPS technique to detect a
tsunami before it reaches the coast.
The system consists of dual - buoys : The support - buoy,
which is sensitive to wind waves, and the sensor - buoy,
is of a spar - type and is insensitive to wind - waves. Both
buoys are equipped with a GPS antenna. An experiment
using this system was carried out for about nine days in
March 1999. Observation data were monitored at the onshore
base station. The results showed that hourly avrage data is
consistent with ocean tides for both buoys.
The sensor - buoy was found not to respond much to wind
waves compared to the support - buoy.
Thus, it may be preferable to use a spar - type buoy for
detecting a tsunami efficiently.
Further more, a simple frequency analysis showed that
a tsunami could be easily separated from higher frequency
wind waves if tsunami is superimposed on regular wind.
.