Using GPS buoy to verify SWH and AP of SAR inversion

Considering a poor condition in using traditional instruments to monitor sea state near Beibu Gulf, this paper presents an economic, flexible, low cost and high accuracy GPS buoy which is mainly used to verify wave parameters which are produced from SAR image inversion. Tide information is removed by wavelet transform, and wind wave information is used to calculate spectrum by Fast Fourier Transform (FFT). In the experiment, GPS buoy presents a flexible and low cost performance in monitoring wind wave. The results show that calculated wave parameters can reach a satisfied and acceptable accuracy and can be used in verifying the outcomes which are calculated by the SAR.