本文選題：月球次表層 + 隨機(jī)等效介質(zhì)�。� 參考：《吉林大學(xué)》2016年碩士論文

【摘要】：在月球遙感領(lǐng)域,由于相關(guān)研究對月球衛(wèi)星雷達(dá)數(shù)據(jù)的雷達(dá)波特性以及月表以下的反射面及深度探測還存在不同的認(rèn)識和相反的結(jié)論,如何通過科學(xué)手段充分了解月表不同巖性單元的電性特性及其深度上的變化梯度,實現(xiàn)月球次表層雷達(dá)波傳播過程建模和解決前人不同認(rèn)識和相反結(jié)論顯得尤為重要。通過對嫦娥三號第一通道探月雷達(dá)數(shù)據(jù)進(jìn)行讀取、拼接、增益以及濾波等處理可看出,在180ns以及640ns附近都存在一個明顯的反射界面。根據(jù)時深轉(zhuǎn)換公式得到兩個分層界面分別在月表下10m及40m處,并且分析認(rèn)為10m以內(nèi)是月壤層。通過建立不同自相關(guān)長度a、b以及模糊度因子r條件下的隨機(jī)等效介質(zhì)模型,分析影響模型建立的因素�；陔S機(jī)等效介質(zhì)理論和FDTD數(shù)值模擬計算方法選擇合適的參數(shù),建立月球隨機(jī)等效介質(zhì)模型,利用錐形函數(shù)對模型進(jìn)行優(yōu)化,得到高精度的月球三層隨機(jī)介質(zhì)正演模型和探月雷達(dá)電磁響應(yīng)剖面圖,為后續(xù)月球次表層介電常數(shù)反演模型驗證提供可靠的正演數(shù)據(jù)。為驗證介電常數(shù)反演方法,研究有限帶寬阻抗(BLIMP)反演理論。以探月雷達(dá)隨機(jī)介質(zhì)模型正演數(shù)據(jù)為基礎(chǔ),通過多次反演,實現(xiàn)有限帶寬阻抗反演模型參數(shù)選取及介電常數(shù)反演。從反演結(jié)果發(fā)現(xiàn),介電常數(shù)反演結(jié)果與模型設(shè)置的介電常數(shù)整體上吻合較好,介電常數(shù)分布情況較為一致,說明有限帶寬阻抗反演方法可用于嫦娥三號探月雷達(dá)數(shù)據(jù)的介電常數(shù)反演。以嫦娥三號第一通道探月雷達(dá)數(shù)據(jù)為基礎(chǔ),利用驗證后的有限帶寬阻抗(BLIMP)反演方法,反演二維隨機(jī)介質(zhì)的介電常數(shù)。反演結(jié)果顯示,不同分層界面明顯,層內(nèi)介電常數(shù)分布特性體現(xiàn)出一定的隨機(jī)性,0~10m以內(nèi)的介電常數(shù)值在2.3310~3.9086之間,與月壤真實樣品介電常數(shù)對比較為吻合;10~40m以內(nèi)的介電常數(shù)范圍為6.5119~8.4897,大部分介電常數(shù)值在7左右。40m以下的介電常數(shù)范圍為7.5010~8.4449,大部分介電常數(shù)值在8左右,與月球玄武巖真實樣品測量值對比較為一致�；谠氯赖刃Ы橘|(zhì)模型理論,利用月壤介電常數(shù)反演結(jié)果,模擬反演月壤平均礦物含量,其中,斜長石含量范圍為20.93%~29.04%;橄欖石含量范圍為37.28%~45.02%;單斜輝石含量范圍為50.44%~60.96%;鈦鐵礦含量范圍為6.79%~8.08%。將月壤礦物含量反演結(jié)果與Apollo和Luna登月點采集的月壤真實樣品礦物含量、凌宗成等人利用APXS數(shù)據(jù)反演的月壤礦物成分以及基于M3數(shù)據(jù)反演的月表礦物成分進(jìn)行對比分析表明,月壤斜長石、輝石以及鈦鐵礦的反演效果較好,橄欖石反演結(jié)果存在一定的偏差。從內(nèi)蒙古錫林浩特、黑龍江阿爾山、黑龍江五大連池、河北張家口、黑龍江鏡泊湖和吉林省輝南地區(qū),選取18塊玄武巖作為模擬月巖樣品,開展介電常數(shù)以及巖石切面占空比(巖石切面單位面積內(nèi)氣孔的總面積)測量。通過分析模擬樣品介電常數(shù)與巖石切面占空比的關(guān)系,得到模擬月巖樣品的介電常數(shù)隨著切面占空比的增加而減小,說明月表以下深度越大,月巖的物質(zhì)結(jié)構(gòu)越致密。將有限帶寬阻抗反演結(jié)果與模擬月巖樣品介電常數(shù)的測量值進(jìn)行對比分析,反演結(jié)果中10~40m以內(nèi)的介電常數(shù)值大部分在7左右,與內(nèi)蒙古錫林浩特地區(qū)的XL-01、XL-03、XL-12以及河北張家口地區(qū)的L5-04測量結(jié)果比較接近,40m以下的介電常數(shù)值大部分在8左右,與河北張家口地區(qū)的L5-01以及L4-09測量結(jié)果較為吻合。這不僅說明有限帶寬阻抗反演結(jié)果具有一定的可靠性,也說明月表以下10~40m以內(nèi)的月巖產(chǎn)狀和巖相與內(nèi)蒙古錫林浩特地區(qū)以及河北張家口地區(qū)的玄武巖類似,部分巖石內(nèi)部存在一定孔隙,還有一部分巖石結(jié)構(gòu)較致密。40m以下的月巖產(chǎn)狀和巖相與河北張家口地區(qū)的玄武巖類似,巖石物質(zhì)結(jié)構(gòu)致密,幾乎沒有孔隙存在。
[Abstract]:In the field of Remote Sensing Research on the moon, because the moon satellite radar data and radar wave reflection characteristics of the lunar surface and the depth of exploration and there are different opinions and the opposite conclusion, how to fully understand the change of gradient electric characteristics of different lithological units and its surface depth through scientific means, realize the lunar subsurface radar wave propagation model and solve the previous different understanding and the opposite conclusion is particularly important. Read through the mosaic, Chang'e three lunar first channel radar data, gain and filtering can be seen in the vicinity of 180ns and 640ns are a clear reflection of the deep transformation formula according to the interface. Two layered interface respectively lunar 10m and 40m, and analyzed that within 10m is a regolith layer. Through the establishment of different autocorrelation length a, B and fuzzy factor under the condition of R Random equivalent medium model, influence factors analysis model. Simulation calculation method of selecting suitable parameters of numerical random equivalent medium theory and based on FDTD, a lunar random equivalent medium model, the model was optimized by using cone function, high accuracy moon three layer random medium forward model and lunar radar electromagnetic response profile, provide forward the reliable data for the subsequent lunar subsurface dielectric constant inversion model validation. As the dielectric constant inversion method to verify the dielectric, the limited bandwidth of the impedance (BLIMP) inversion theory. The lunar radar random medium model is based on data through multiple parameters inversion, finite bandwidth impedance inversion model is selected and the dielectric constant of inversion found. From the inversion results, dielectric constant and dielectric constant of the inversion results on the whole are in good agreement with the model set, the dielectric constant distribution situation is consistent, The finite bandwidth impedance inversion method for dielectric constant inversion Chang'e three lunar radar data. The Chang'e three lunar radar based on the data of the first channel, using limited bandwidth to verify the impedance (BLIMP) inversion method, dielectric constant inversion of two-dimensional random medium. The inversion results show that different interfacial layer obviously. Dielectric constant distribution reflects a certain randomness, the dielectric constant value less than 0~10m between 2.3310~3.9086, and the lunar regolith sample real permittivity of dielectric constant for anastomosis; range within 10~40m 6.5119~8.4897, most of the dielectric constant dielectric constant in the range of about 7.40m below 7.5010~8.4449 and most of the dielectric constant at about 8, and the real measured value of lunar basalt samples for comparison. The lunar regolith model theory based on equivalent medium, using regolith dielectric constant inversion. Results the average mineral content, inversion of lunar regolith simulation the plagioclase content is in the range of 20.93%~29.04%; the content of olivine in the range of 37.28%~45.02% content in the range of 50.44%~60.96%; clinopyroxene; ilmenite content is in the range of 6.79%~8.08%. the lunar soil mineral content inversion with Apollo and Luna landing point acquisition of lunar soil samples real mineral content, Ling Zongcheng et al use of lunar soil mineral composition of the inversion of APXS data and M3 data inversion of lunar minerals based on the comparative analysis shows that the regolith plagioclase, pyroxene ilmenite and better inversion effect, olivine inversion results have certain deviation from Inner Mongolia. Xilinhaote, Heilongjiang, Arxan, Heilongjiang, Wudalianchi, Hebei, Zhangjiakou, Heilongjiang, Lake Jingpo and Jilin Huinan area, select 18 as a piece of basalt rock samples to carry out simulation, dielectric constant and duty ratio (rock section The total area of the rock section in unit area of stomata) measurement. Through the analysis of simulated sample permittivity and rock section of duty, the dielectric constant of simulated rock samples decreases with the increase of the duty ratio section, indicating greater depth of the lunar lunar material structure, the measurement results will be more compact. The limited bandwidth impedance inversion and Simulation of rock samples values of the dielectric constant were analyzed, the inversion results in 10~40m within the dielectric constant value most in about 7, and the Inner Mongolia Xilinhaote area XL-01, XL-03, L5-04 and XL-12 measurement results are close to the Hebei Zhangjiakou area, the dielectric constant value below 40m mostly in about 8 with the Hebei, Zhangjiakou area L5-01 and L4-09 measurement results are consistent. It shows not only the limited bandwidth impedance inversion results has certain reliability, also said the moon surface to 10~40m Within the rock occurrence and lithofacies and Inner Mongolia Xilinhaote area and Hebei area of Zhangjiakou like Xuan Wuyan, there are some parts of the rock pore, and a part of the rock structure is more dense than.40m rock occurrence and lithofacies and Hebei Zhangjiakou area of Xuan Wuyan is similar to that of rock material is compact, almost no pores exist.

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P184.5

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