Development of 9.25MHz Ocean Radar for Measuring Ocean Waves

The National Institute of Information and Communications Technology (NiCT) is developing a 9.25-MHz ocean radar for measuring sea surface currents and ocean waves offshore. This study clarifies the accuracy and validity of observing ocean waves with a 9.25-MHz ocean radar. The precision of the receiving signals of the 9.25-MHz ocean radar is evaluated by observing ocean waves with a wave gage mounted on a buoy. The results of observing ocean waves with a 9.25-MHz ocean radar are compared with the results of observing them with a wave gage. This comparison showed that the directional wave spectrum can be estimated from the receiving signals when the noise level is low during the day.