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从波作用量守恒方程出发，在积分方程模型的基础上，通过特征线法对守恒方程进行求解，推导建立了受波流调制的海面雷达双站散射模型，进行了受流场调制下的海面上半空间散射系数的仿真，分析了全极化下双站散射系数受流速变化的影响，以及风场与雷达参数(雷达波频率、雷达波入射角)对流场调制作用的影响。结果表明，随着流速的增大，海面后向散射空间半球区域的散射系数逐渐减小，在前向散射空间半球区域中，交叉极化下的散射系数变化较为明显。风速的增大和风向与流向的夹角增大会导致流场调制所引起的散射系数变化减弱。入射角变化会导致调制作用最明显区域的散射角度改变。随着频率的增大，流场调制作用增大。
Abstract：Based on the conservation equation of the wave action and the Integral equation model, the eigenline method is used to solve the conservation equation. The bistatic scattering model from sea surface modulated by the current field is derived and established. Under the modulated by the current field, scattering coefficients of the upper half space on the sea surface are calculated. The influence of bistatic scattering coefficients on the current speed change under the full polarizations is analyzed. And the influence of wind field and radar parameters(radar wave frequency, radar wave incident angle) on the modulation of current field is analyzed. The results show that with the increase of current speed, scattering coefficients in the forward scattering space hemispheres decrease gradually. In the forward scattering space hemispheres, scattering coefficients change obviously under cross-polarization. The increase of wind speed and the angle between wind direction and current direction will weaken the variation of scattering coefficients caused by current field modulation. A change in the incident Angle will result in a change in the scattering Angle in the region where the modulation is most pronounced. With the increase of frequency, the modulation effect of current field increases.
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基本信息:
DOI：10.16441/j.cnki.hdxb.20220493
中图分类号:TN957.51
引用信息:
[1]陈佳杰,苗洪利,刘训超,等.流场调制下的海面对全极化雷达双站散射的影响研究[J],2023,53(S1):30-42.DOI:10.16441/j.cnki.hdxb.20220493.
基金信息:
国家自然科学基金项目(62031005);; 山东省自然科学基金项目(ZR2020MD097)资助~~
2022-12-07
2022
2023-01-01
2023-02-20
2023
1