National Aerospace Laboratory of Japan

Tokio Kasai

Isao Yamaguchi

Masatoshi Harigae

The present invention provides a GPS device for measuring the wave height and current direction and speed, which is capable of accurately measuring the wave height (height of the waves) and current direction and speed (tidal current) in any point on the sea, ocean, lake, or marsh, and to a system using such a device. The GPS receiverof the GPS devicefor measuring the wave height and current direction and speed processes the GPS signals received with the GPS antennaand measures the three-dimensional position of antenna. The three-dimensional position data are recorded by the data recording unitconnected to the GPS receiver. When the floating bodyhaving those devicesinstalled thereon floats on the sea or ocean, it moves together with the waves and tidal current in the present location. The softwarefor conducting high-pass filter processing and smoothing processing is installed in the data processing unit, and the data on the wave height and current direction and speed are output, while the errors are being removed from the three-dimensional position data recorded in the data recording unit

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Tokyo, Japan

Tokio Kasai