Wave information by precise velocity measurement using GPS buoy

In this paper observation method for wave direction and height is proposed. The precise velocity measured by velocity information GPS (VI-GPS) on our buoy is introduced in our method. Because VI-GPS can measure precise velocity without a reference station on land, one usual GPS receiver is only needed. Two basic experiments were carried out to assess the method. Compared with the result of kinematic GPS (K-GPS), the average value measured by VI-GPS in our experiments was almost the same, although the standard deviation of wave direction was larger. Two significant wave heights estimated by VI-GPS and K-GPS had almost same value.