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为了拓宽便携式高频地波雷达(OSMAR-S)的应用场合,提高其海态监测的能力,通过船载雷达系统走航的方式获取大范围的海洋回波信息.利用实测数据中形态多样的一阶海洋回波谱图,分析了海流、风向和雷达探测张角对回波谱的影响,讨论了径向流速和风向信息提取的可行性.研究结果表明:在船沿岸走航的情况下,海流引起回波谱频点的偏移,风向规律地改变谱图的形态,岸基单站雷达的风向模糊问题得以解决;在船四面环海航行的情况下,单个回波频点存在双到达角和风向模糊的问题.
In order to broaden the applications of OSMAR-S and improve its ability of marine monitoring, a large range of oceanic echoes can be obtained by means of onboard radar systems, First-order ocean echo spectrum, the influence of current, wind direction and radar detection angle on the echo spectrum is analyzed, and the feasibility of radial velocity and wind direction information extraction is discussed. The results show that in the case of navigating along the coast of the ship, Causing the frequency shift of the echo spectrum, the wind direction changes the morphology of the spectrum regularly, the wind direction fuzzy problem of the shore-based single-station radar can be solved; in the circumstance where the ships sail around the sea, the single echo frequency has the double angle of arrival Blurred wind problems.