本文選題：嫦娥二號衛(wèi)星　切入點：亮溫　出處：《地球科學(中國地質(zhì)大學學報)》2014年11期

【摘要】：月壤介電常數(shù)是當前月球微波遙感探測的基礎,是月壤厚度、成分等信息提取不可或缺的參數(shù).為了實現(xiàn)全月介電常數(shù)反演,通過對嫦娥二號衛(wèi)星微波輻射計亮溫數(shù)據(jù)進行時角校正,得到同一時角的全月微波亮溫圖.全月微波亮溫表現(xiàn)出隨月球地形、月壤成分及緯度變化的特征.基于校正后的微波輻射亮溫,結合輻射傳輸模型,通過解算相關參數(shù),反演得到3GHz頻率下全月介電常數(shù)分布.其中,月海地區(qū)的介電常數(shù)實部高于月陸地區(qū),且月球極地區(qū)域介電常數(shù)實部偏低;而介電常數(shù)虛部則在月海區(qū)域和艾肯盆地較高.通過模擬月表介電常數(shù)實驗對反演結果進行溫度校正,得到22℃下全月介電常數(shù).將反演結果和月壤真實樣品的介電常數(shù)測量值進行比較評價.結果表明介電常數(shù)實部相對誤差都低于11%;虛部相對誤差偏大,但其差值最大僅為0.02.因此,基于嫦娥二號衛(wèi)星微波輻射計亮溫數(shù)據(jù)反演月表介電常數(shù)的方法是可行的.
[Abstract]:The permittivity of lunar soil is the basis of lunar microwave remote sensing, and it is an indispensable parameter for extracting information such as the thickness and composition of lunar soil.In order to realize the inversion of the permittivity of the whole month, by correcting the brightness temperature data of the Chang 'e-2 satellite microwave radiometer, the microwave bright temperature map of the whole month at the same time angle is obtained.The microwave brightness temperature of the whole moon shows the characteristics of variation with the lunar topography, lunar soil composition and latitude.Based on the corrected brightness temperature of microwave radiation and the radiation transfer model, the permittivity distribution of the whole month at 3GHz frequency is obtained by calculating the relevant parameters.Among them, the real part of dielectric constant in the lunar sea area is higher than that in the lunar land area, and the real part of the dielectric constant in the polar region of the moon is lower, while the imaginary part of the dielectric constant is higher in the lunar sea region and the Eiken basin.The temperature correction of the inversion results is carried out by simulating the dielectric constant of the month surface, and the dielectric constant of the whole month is obtained at 22 鈩，

本文編號：1718069