本文選題：掠入射　切入點(diǎn)：鏡面反射　出處：《微波學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：海面掠入射散射特性對海洋遙感等問題有著重要應(yīng)用,海面對雷達(dá)波束的鏡面反射對海上超低空目標(biāo)與海面的耦合場有著重要影響,利用海面的布儒斯特效應(yīng)將有效削弱鏡面反射。以西太平洋和東南沿海鹽度場與溫度場的衛(wèi)星數(shù)據(jù)為基礎(chǔ),根據(jù)雙Debye方程建立修正海水介電模型計(jì)算不同海域介電常數(shù);基于Elfouhaily海譜模型,采用修正雙尺度模型并考慮不同風(fēng)速及頻率下的截?cái)嗖〝?shù),仿真分析了風(fēng)速、頻率、海水溫度與鹽度等因素對海面掠入射散射特性及布儒斯特效應(yīng)的影響,總結(jié)歸納了海面布儒斯特效應(yīng)產(chǎn)生機(jī)理和變化規(guī)律。分析表明:風(fēng)速、頻率及海水溫度均會(huì)對海面布儒斯特效應(yīng)產(chǎn)生影響。該研究為海洋環(huán)境的遙感探測及海上超低空目標(biāo)的監(jiān)測與跟蹤提供了理論支撐。
[Abstract]:The scattering characteristics of grazing incident sea surface have important applications in ocean remote sensing, and the mirror reflection of radar beam on the sea surface has an important influence on the coupling field between the very low altitude target and the sea surface. Based on the satellite data of salinity field and temperature field in the western Pacific Ocean and the southeast coast, the dielectric constant of different sea areas is calculated by using the modified seawater dielectric model based on the double Debye equation. Based on the Elfouhaily sea spectrum model, the effects of wind speed, frequency, sea water temperature and salinity on the scattering characteristics and the Brewster effect of sea surface are simulated and analyzed by using the modified two-scale model and considering the truncated wavenumber at different wind speeds and frequencies. The formation mechanism and variation law of the Brewster effect on the sea surface are summarized. The analysis shows that the wind speed, The frequency and sea temperature will affect the Brewster effect on the sea surface. This study provides a theoretical support for the remote sensing detection of marine environment and the monitoring and tracking of very low altitude targets at sea.
【作者單位】： 空軍工程大學(xué)防空反導(dǎo)學(xué)院;
【基金】：國家自然科學(xué)基金(61372033)
【分類號】：TN011

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本文編號：1629229