DETERMINATION OF SIGNIFICANT WAVE HEIGHT FROM SENTINEL-3B SATELLITE ALTIMETRY DATA IN THE EAST SEA

Tóm tắt

The purpose of this paper is to present the results of determining significant wave height (SWH) from satellite altimetry data in the East Sea and to evaluate the accuracy of the obtained values of SWH. To achieve this, the paper introduces the method for determining significant wave height, in which significant wave height is derived from the leading-edge slope of the return signal waveform. Accuracy is assessed based on the deviation between significant wave heights determined from the Ku- and C-band measurements at the same location. The experiment was conducted in the East Sea using Sentinel-3B satellite data from cycle 96. The results show that 4,856 significant wave height values were obtained, with a maximum of 1.962 m, a minimum of 0.030 m, and an average of 0.830 m. The deviations of significant wave height generally follow a random distribution; however, 80 anomalous points, located near islands and coastal areas, needed to be excluded. The accuracy of the determined wave heights is estimated at ±0.378 m. The processing results for 84 cycles indicate that the SWH accuracy ranges from ±0.315 m to ±0.440 m, with an average of ±0.402 m.