抄録
The Observation of two dimensional (2-D) wave parameter distribution is important for the estimation of the wave force to marine constructions, such as jetty. The in situ data routinely observed now are point data and the cost is expensive, so the number of observation point is a few. There is no routine method for monitoring 2-D wave parameter distribution.
Marine radar can offer the image of 2-D wave field by monitoring the sea clutter from the sea surface. The data from marine radar is, however, analog data, so it is difficult to analyze 2-D wave parameter from the image.
We are developing the data acquisition system from marine data now. Before the marine radar is calibrated by comparing in situ data, we proposed the method for monitoring 2-D wave parameter, especially wave length and wave direction, by using simulated image of marine radar in this study.
Image of marine radar was simulated by FFT, when wave direction was 0, 30, 45, 60 and 90 deg. and wave length is 1/8, 1/4 and 3/8 of perimeter size of the target area. It is concluded that the accuracy of the proposed method in this study is concluded over 90% and it is accurate enough for operational use.
