Estimate of Tidal Constituents in Nearshore Waters Using X-Band Marine Radar Image Sequences
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摘要The accurate observation and prediction of tides are important in coastal waters. A new method is proposed to estimate tidal constituents in nearshore waters from X-band marine radar image sequences, based on the modulation of wave height by tide. The relative wave height is retrieved from the first principal component of the X-band marine radar image sequence, and a self-adaption method is used to remove the low-quality data under very low sea state. To eliminate the influence of atmospheric planetary waves, a type I Chebyshev bandpass filter is applied to the time series of the derived wave heights. Relative tidal amplitudes and phases are then obtained through harmonic analysis of the filtered wave heights, and true tidal amplitudes are derived through a linear relation, while true tidal phases are obtained by cross-spectral analysis. The errors of the amplitudes of M2, S2, K1, and O1 tides retrieved from X-band marine radar image sequences are 0.15-1.12, 2.22-3.83, 3.06-4.29, and 4.50-9.47 cm, respectively, as compared with those predicted by a numerical model; the errors of M2 tidal phase are 3.27 degrees-4.59 degrees. It shows that the proposed method is appropriate for long and continuous observations of X-band marine radar.
著者Chen ZB, Pan JY, He YJ, Devlin AT
期刊名稱IEEE Transactions on Geoscience and Remote Sensing
出版年份2016
月份11
日期1
卷號54
期次11
出版社IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
頁次6700 - 6711
國際標準期刊號0196-2892
電子國際標準期刊號1558-0644
語言英式英語
關鍵詞Empirical orthogonal function; nearshore; tide; X-band marine radar
Web of Science 學科類別Engineering; Engineering, Electrical & Electronic; Geochemistry & Geophysics; Imaging Science & Photographic Technology; Remote Sensing

上次更新時間 2020-08-08 於 02:45