【摘要】：技術(shù)參數(shù)設計研究是提升全極化SAR海洋環(huán)境探測能力的有效途徑.本文通過分析噪聲等效后向散射系數(shù)和輻射分辨率與海洋環(huán)境探測的地球物理聯(lián)系,提出一種全極化SAR關(guān)鍵技術(shù)參數(shù)設計方法.采用全極化海面散射模型計算不同海洋環(huán)境條件下的雷達后向散射系數(shù),據(jù)此確定全極化SAR對海探測的噪聲等效后向散射系數(shù),再將其作為合成孔徑雷達方程輸入?yún)?shù),以輻射分辨率和信噪比的函數(shù)關(guān)系為約束條件,開展信噪比、輻射分辨率和系統(tǒng)功率孔徑積等技術(shù)參數(shù)設計研究.論文通過全極化海面散射模型的仿真計算,發(fā)現(xiàn)對海探測的噪聲等效后向散射系數(shù)設計為-35.0 dB,可滿足全極化SAR不同海洋環(huán)境條件的探測需求.通過研究輻射分辨率與信噪比的函數(shù)關(guān)系,發(fā)現(xiàn)對海探測的最優(yōu)信噪比為8.0 dB.C波段機載全極化SAR設計結(jié)果表明,由于兼顧了海洋環(huán)境探測需求,本文設計方法使得全極化SAR技術(shù)參數(shù)同時滿足了海洋環(huán)境應用需求和系統(tǒng)設計要求.
[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.
【作者單位】： 解放軍理工大學氣象海洋學院;
【基金】：國家自然科學基金(批準號:41076118,41375029,41306187)資助的課題~~
【分類號】：TN958

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