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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Radar surface signatures based on the two-dimensional tidal circulation of Phelps Bank
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Radar surface signatures based on the two-dimensional tidal circulation of Phelps Bank

机译:基于菲尔普斯银行二维潮汐循环的雷达表面信号

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摘要

Numerical results for the M/sub 2/ tidal currents over Phelps Bank, Nantucket Shoals, Massachusetts, with 1/8*1/8 min arc resolution are used to predict the radar surface signatures (cross sections sigma ) of Phelps Bank using the first-order relaxation model of W. Alpers and I. Hennings (1984). The numerical predictions of sigma incorporate all two-dimensional contributions from the tidal currents and include both the residual and first-harmonic term. Strong correlation between spatially resolved contour plots of sigma over a wide range of directions and time intervals within the tidal cycle, with variations in the bottom topography of the Phelps Bank, is obtained even when Bragg wave scattering alone is included. The predictions for sigma are contrasted with previous measurements in the Phelps Bank by the US Naval Research Laboratory, and the importance of including the off-diagonal elements from the current stress tensor in the evaluation of sigma is discussed.
机译:使用马克斯解析度为1/8 * 1/8分钟的马萨诸塞州楠塔基特浅滩的菲尔普斯河岸的M / sub 2 /潮流数值结果,使用第一个方法来预测菲尔普斯河岸的雷达表面信号(截面sigma)。 W. Alpers和I. Hennings(1984)的高阶松弛模型。西格玛的数值预测包括了来自潮流的所有二维贡献,并且包括余项和一次谐波项。即使单独包含布拉格波散射,在潮汐周期内,在较大方向和时间间隔内,沿较大方向和时间间隔的sigma空间分辨轮廓图之间的强相关性也得到了很好的相关性。对sigma的预测与美国海军研究实验室在菲尔普斯银行(Phelps Bank)先前的测量结果进行了对比,并讨论了将当前应力张量中的非对角线元素包括在sigma评估中的重要性。

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