基于海面散射模型的全极化合成孔径雷达海洋环境探测关键技术参数设计仿真研究
发布时间：2019-07-16 20:20
【摘要】：技术参数设计研究是提升全极化SAR海洋环境探测能力的有效途径.本文通过分析噪声等效后向散射系数和辐射分辨率与海洋环境探测的地球物理联系,提出一种全极化SAR关键技术参数设计方法.采用全极化海面散射模型计算不同海洋环境条件下的雷达后向散射系数,据此确定全极化SAR对海探测的噪声等效后向散射系数,再将其作为合成孔径雷达方程输入参数,以辐射分辨率和信噪比的函数关系为约束条件,开展信噪比、辐射分辨率和系统功率孔径积等技术参数设计研究.论文通过全极化海面散射模型的仿真计算,发现对海探测的噪声等效后向散射系数设计为-35.0 dB,可满足全极化SAR不同海洋环境条件的探测需求.通过研究辐射分辨率与信噪比的函数关系,发现对海探测的最优信噪比为8.0 dB.C波段机载全极化SAR设计结果表明,由于兼顾了海洋环境探测需求,本文设计方法使得全极化SAR技术参数同时满足了海洋环境应用需求和系统设计要求.
[Abstract]:The design of technical parameters is an effective way to improve the detection ability of fully polarized SAR marine environment. In this paper, a design method of key technical parameters of fully polarized SAR is proposed by analyzing the geophysical relationship between noise equivalent backscattering coefficient and radiation resolution and marine environment detection. The radar backscattering coefficients under different marine environment conditions are calculated by using the fully polarized sea surface scattering model. Based on this, the equivalent backscattering coefficients of fully polarized SAR for sea detection are determined, and then taken as the input parameters of synthetic aperture radar equation, the technical parameters such as signal-to-noise ratio (SNR), radiation resolution and system power aperture product are designed and studied with the functional relationship between radiation resolution and signal-to-noise ratio (SNR) as constraints. Through the simulation calculation of the fully polarized sea surface scattering model, it is found that the noise equivalent backscattering coefficient of sea detection is designed to be-35.0 dB, which can meet the detection requirements of different marine environmental conditions of fully polarized SAR. By studying the functional relationship between radiation resolution and signal-to-noise ratio, it is found that the optimal signal-to-noise ratio of sea detection is 8.0 dB.C band airborne fully polarized SAR design results show that the design method makes the fully polarized SAR technical parameters meet the requirements of marine environment application and system design at the same time because of taking into account the needs of marine environment detection.
【作者单位】： 解放军理工大学气象海洋学院;
【基金】：国家自然科学基金(批准号:41076118,41375029,41306187)资助的课题~~
【分类号】：TN958
[Abstract]:The design of technical parameters is an effective way to improve the detection ability of fully polarized SAR marine environment. In this paper, a design method of key technical parameters of fully polarized SAR is proposed by analyzing the geophysical relationship between noise equivalent backscattering coefficient and radiation resolution and marine environment detection. The radar backscattering coefficients under different marine environment conditions are calculated by using the fully polarized sea surface scattering model. Based on this, the equivalent backscattering coefficients of fully polarized SAR for sea detection are determined, and then taken as the input parameters of synthetic aperture radar equation, the technical parameters such as signal-to-noise ratio (SNR), radiation resolution and system power aperture product are designed and studied with the functional relationship between radiation resolution and signal-to-noise ratio (SNR) as constraints. Through the simulation calculation of the fully polarized sea surface scattering model, it is found that the noise equivalent backscattering coefficient of sea detection is designed to be-35.0 dB, which can meet the detection requirements of different marine environmental conditions of fully polarized SAR. By studying the functional relationship between radiation resolution and signal-to-noise ratio, it is found that the optimal signal-to-noise ratio of sea detection is 8.0 dB.C band airborne fully polarized SAR design results show that the design method makes the fully polarized SAR technical parameters meet the requirements of marine environment application and system design at the same time because of taking into account the needs of marine environment detection.
【作者单位】： 解放军理工大学气象海洋学院;
【基金】：国家自然科学基金(批准号:41076118,41375029,41306187)资助的课题~~
【分类号】：TN958
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