本文選題：散射 + 微波遙感�。� 參考：《光學(xué)學(xué)報》2017年09期

【摘要】：以修正的Dobson介電常數(shù)模型作為基礎(chǔ)模型,分析并驗證了土壤體積含水量和含鹽量與介電常數(shù)的關(guān)系。在此基礎(chǔ)上,提取不同極化方式下的雷達(dá)影像后向散射系數(shù),分析后向散射系數(shù)與介電常數(shù)之間的關(guān)系。結(jié)果表明:體積含水量和含鹽量是土壤介電常數(shù)的主要影響因素;體積含水量是介電常數(shù)實部的決定性因素,直接決定土壤介電常數(shù)實部的大小;介電常數(shù)虛部受多種因素的影響,含鹽量為主要因素;體積含水量和含鹽量相互作用,共同影響后向散射系數(shù);在交叉極化模式下,介電常數(shù)是影響雷達(dá)影像后向散射系數(shù)的主要因素。基于土壤的介電常數(shù)來監(jiān)測土壤中的含鹽量和體積含水量具有一定的潛力,通過雷達(dá)影像反演土壤中的含鹽量是完全可能的。
[Abstract]:Based on the modified Dobson dielectric constant model, the relationship between soil volumetric water content, salt content and dielectric constant was analyzed and verified. On this basis, the backward scattering coefficients of radar images under different polarization modes are extracted, and the relationship between backscattering coefficients and dielectric constants is analyzed. The results show that the volume water content and salt content are the main influencing factors of the soil dielectric constant, and the volume water content is the decisive factor of the real part of the dielectric constant, which directly determines the size of the real part of the soil dielectric constant. The imaginary part of dielectric constant is affected by many factors, the salt content is the main factor, the interaction of volume water content and salt content affects the backscattering coefficient together. The dielectric constant is the main factor that affects the backscattering coefficient of radar image. Based on the dielectric constant of soil to monitor the salinity and volume water content of soil, it is possible to retrieve the salt content of soil by radar image.
【作者單位】： 新疆大學(xué)資源與環(huán)境科學(xué)學(xué)院;新疆大學(xué)綠洲生態(tài)教育部重點實驗室;
【基金】：國家自然科學(xué)基金(U1303381,41261090) 自治區(qū)重點實驗室專項基金(2016D03001) 自治區(qū)科技支疆項目(201591101) 教育部促進(jìn)與美大地區(qū)科研合作與高層次人才培養(yǎng)項目 新疆大學(xué)優(yōu)秀博士研究生創(chuàng)新項目(XJUBSCX-2016013)
【分類號】：S156.41;TP722.6

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