Abstract
A new system for measuring ocean wave height, period and direction within ten centimeter accuracy is developed using a point-positioning commercial-based GPS receiver mounted on a buoy. The essential idea of the proposed system depends on the fact that the most of the spectrum of GPS point-positioning error lies in the frequency domain below 0.01Hz, but the frequency spectrum of ocean waves exists in a seperate band around 0.1Hz. Therefore, a simple high-pass filter can extract movements of a GPS equipped buoy excited by ocean waves without GPS long term period point-positioning error.
