本文關(guān)鍵詞：基于嫦娥探月微波數(shù)據(jù)的月球淺表層成分反演與結(jié)構(gòu)分析研究　出處：《吉林大學(xué)》2014年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 嫦娥衛(wèi)星 微波輻射計(jì) 測月雷達(dá) 輻射傳輸模型 SVD模型 介電常數(shù) 氧化亞鐵 氧化鈦 月壤厚度 淺表層結(jié)構(gòu)

【摘要】：目前可見光、紅外等遙感技術(shù)已經(jīng)應(yīng)用于月球的探測中，但是這些遙感手段都受到了穿透深度的影響，只能反映月球表面的信息，無法對月壤層內(nèi)的資源進(jìn)行探索，無法揭示月球次表層結(jié)構(gòu)。月球表面沒有水的存在，月壤作為低損耗介質(zhì)，電磁波可以對月球月壤層及次表層結(jié)構(gòu)進(jìn)行探測。因此，研究如何將地球中的微波遙感技術(shù)應(yīng)用在月球探測中，是一項(xiàng)非常重要的工作。我國首次在嫦娥一號、嫦娥二號衛(wèi)星上搭載了微波輻射計(jì)和在嫦娥三號衛(wèi)星上搭載了測月雷達(dá)，對月球進(jìn)行微波遙感探測。論文以電磁波散射與輻射為物理基礎(chǔ)，微波遙感為探測手段，基于嫦娥探月微波輻射計(jì)和測月雷達(dá)數(shù)據(jù)，探測月球表面月壤特性和成分、淺層月殼分層結(jié)構(gòu)，希望能對今后的探月工程提供理論依據(jù)。 研究中首先對嫦娥微波輻射計(jì)和測月雷達(dá)數(shù)據(jù)進(jìn)行了處理。在對微波輻射計(jì)數(shù)據(jù)處理過程中，給出了嫦娥微波輻射計(jì)數(shù)據(jù)的幾種時(shí)角校正方式，研究不同頻率及不同緯度下的時(shí)角和亮溫的相關(guān)關(guān)系，分別建立了不同頻率通道下和不同緯度下的亮溫日變化模型，并根據(jù)模型對亮溫?cái)?shù)據(jù)進(jìn)行了時(shí)角校正，基于亮溫日變化模型得到了特定時(shí)間的全月微波亮溫分布。文章還利用克里金插值的方式，得到了不同時(shí)間不同頻率下的全月亮溫分布。結(jié)合DEM和CCD影像數(shù)據(jù)評價(jià)了微波亮溫圖，結(jié)果表明利用嫦娥二號微波輻射計(jì)數(shù)據(jù)基于時(shí)角校正制作全月微波亮溫圖，，很好地反映了月球地形以及月表反射率特征。對測月雷達(dá)數(shù)據(jù)的讀取主要是通過測月雷達(dá)的相對位置信息確定了3條雷達(dá)測線，根據(jù)位置信息對雷達(dá)數(shù)據(jù)進(jìn)行了壞道剔除和拼接，得到了2個(gè)通道(60MHz，500MHz)下的雷達(dá)反射波波形圖。 在得到了全月微波亮溫圖后，研究中結(jié)合SVD模型對一個(gè)月球晝夜時(shí)刻12個(gè)不同時(shí)刻的37GHz和3GHz的微波亮溫圖進(jìn)行分析，得到了3GHz的亮溫?cái)?shù)據(jù)為左場、37GHz的亮溫?cái)?shù)據(jù)為右場SVD的相關(guān)圖，在中低緯度地區(qū)分析月球亮溫變化異常和火山分布之間的關(guān)系；在高緯度地區(qū)，結(jié)合DEM數(shù)據(jù)提取月球永久陰影區(qū)，探測了月球水冰可能存在的位置。 基于輻射傳輸模型，結(jié)合處理后的全月亮溫?cái)?shù)據(jù)，通過解算相關(guān)參數(shù)，對3GHz下的全月介電常數(shù)實(shí)部和虛部進(jìn)行初步反演。其中，月海地區(qū)的介電常數(shù)實(shí)部高于月陸地區(qū)，且月球極地區(qū)域介電常數(shù)實(shí)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(shí)驗(yàn)對反演結(jié)果進(jìn)行溫度校正，得到22°C下全月介電常數(shù)。將反演結(jié)果和月壤真實(shí)樣品的介電常數(shù)測量值進(jìn)行比較評價(jià)。結(jié)果表明介電常數(shù)實(shí)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。研究了介電常數(shù)虛部和FeO+TiO2的函數(shù)關(guān)系，結(jié)合輻射傳輸模型，對全月FeO+TiO2進(jìn)行定量反演。在月海海域和艾肯盆地的FeO+TiO2含量較高，約為20％-30％。然而FeO+TiO2含量在高原地區(qū)相對較低。將伽瑪射線數(shù)據(jù)反演結(jié)果，克萊門汀反演結(jié)果，CE-2的微波輻射計(jì)數(shù)據(jù)反演結(jié)果與實(shí)際月球土壤的實(shí)驗(yàn)室數(shù)據(jù)進(jìn)行比較，發(fā)現(xiàn)CE-2的微波輻射計(jì)數(shù)據(jù)的反演結(jié)果在所有結(jié)果中與月壤真實(shí)樣品的測量結(jié)果相關(guān)系數(shù)最高。 在利用測月雷達(dá)數(shù)據(jù)對月球主動微波遙感中，為了更好的分析測月雷達(dá)的探測結(jié)果，對測月雷達(dá)進(jìn)行了數(shù)值模擬和地表模擬實(shí)驗(yàn)。數(shù)字模擬中，利用GPRMax模擬了測月雷達(dá)對月球不同地質(zhì)結(jié)構(gòu)的探測結(jié)果，分析了月球不同地質(zhì)結(jié)構(gòu)下的雷達(dá)反射波波形特征，其中包括月球表層結(jié)構(gòu)分層模擬，月壤內(nèi)水冰分布模擬和月巖層的下界面模擬。在地表模擬實(shí)驗(yàn)中，實(shí)驗(yàn)選擇了和月球地質(zhì)構(gòu)造相對接近的內(nèi)蒙古錫林浩特地區(qū)的鴿子山作為月球試驗(yàn)場，進(jìn)行了野外實(shí)驗(yàn)，主要利用探地雷達(dá)模擬60MHz和500MHz測月雷達(dá)對月表淺層結(jié)構(gòu)的探測，通過探地雷達(dá)數(shù)據(jù)對該地的火山巖地質(zhì)特征進(jìn)行了相關(guān)分析研究。在地表模擬實(shí)驗(yàn)除了野外實(shí)驗(yàn)外，也包括了室內(nèi)月球模擬探測實(shí)驗(yàn)，通過實(shí)驗(yàn)室內(nèi)設(shè)計(jì)的一條短剖面，主要針對500MHz測月雷達(dá)的探測深度對測月雷達(dá)進(jìn)行了相關(guān)的模擬探測。 最后，對測月雷達(dá)的數(shù)據(jù)進(jìn)行了相關(guān)的雷達(dá)數(shù)據(jù)處理，主要包括數(shù)據(jù)濾波，數(shù)據(jù)拼接，反褶積和擴(kuò)散補(bǔ)償，將處理結(jié)果結(jié)合GPRMAX、地表模擬探測結(jié)果，對測月雷達(dá)探測數(shù)據(jù)進(jìn)行了相關(guān)分析，得到登月點(diǎn)的月壤厚度和月表淺層結(jié)構(gòu)。
[Abstract]:At present, visible light, infrared remote sensing technology has been applied to lunar exploration, but these remote sensing techniques are affected by the depth of penetration, can only reflect the information about the surface of the moon, the lunar regolith layer to resources in the exploration of lunar subsurface structure cannot be revealed. The moon without the presence of water, soil as low lossy medium, electromagnetic wave can be detected on the lunar regolith layer and subsurface structure. Therefore, to study how the earth in the microwave remote sensing technology application in lunar exploration, is a very important work in our country. For the first time in Chang E 1, Chang'e two satellite microwave radiometer and in Chang'e three satellite measurement month radar, microwave remote sensing of lunar exploration. Based on the electromagnetic scattering and radiation physics based microwave remote sensing for detecting means, the goddess of the moon exploration microwave radiometer and based on Ce Yuelei It is hoped to provide a theoretical basis for the future lunar exploration project by detecting the characteristics and components of lunar loam and the stratified structure of the shallow lunar crust.
Of Chang E microwave radiometer and radar data were measured monthly. In the microwave radiometer data processing, gives several meter data e microwave radiation angle correction method, the correlation of different frequency and different latitudes of the angle and brightness temperature, different frequencies are established brightness temperature diurnal variation model and different latitudes, and according to the model of the brightness temperature data of angle correction, brightness temperature change model has been a full month microwave brightness temperature distribution based on a specific time. Using the Kriging interpolation method, the full moon temperature distribution at different time under different frequency the combination of DEM and CCD image data. The evaluation results show that the microwave brightness temperature, Chang'e two microwave radiation angle correction making microwave brightness temperature data based on the month, well reflect the moon and lunar terrain To read the measured reflectance characteristics. April radar data is mainly of 3 radar measuring line is determined by the relative position information of the measured monthly radar, according to the position information of the defects elimination and mosaic of radar data, the 2 channels (60MHz, 500MHz) under the radar echo waveform.
In the whole month microwave brightness temperature map, in the research of SVD model combined with microwave on a lunar day and night time 12 different moments of 37GHz and 3GHz on temperature were analyzed by 3GHz brightness temperature data for the left field, 37GHz brightness temperature data for the right field SVD diagram, analysis of the relationship between the moon brightness temperature changes between the anomaly and the volcano distribution in the low latitude region; at high latitudes, the moon extracted the permanently shadowed regions based on the DEM data, the detection of water ice on the moon may exist.
Based on radiative transfer model, combined with the full moon temperature after data processing, through the calculation of relevant parameters, initial inversion of 3GHz under the full moon, the dielectric constant of the real and imaginary parts. Among them, the sea area of the real part of the permittivity is higher than the monthly land area and the polar regions of the moon, the real part of permittivity is low; and the imaginary part of dielectric constant in the sea area and Aiken basin. Through high dielectric constant experiments on simulated lunar inversion results for temperature correction, 22 DEG C for the whole month of dielectric constant. The inversion results of lunar soil samples and real permittivity measurement values were evaluated. The results show that the dielectric constant. Department of the relative errors are less than 11%; the relative error is big imaginary part, but the biggest difference is only 0.02. of the function between the imaginary part of the dielectric constant and FeO+TiO2, combined with the radiative transfer model, quantitative inversion of the whole month. In the sea and AI Maria FeO+TiO2 Ken FeO+TiO2 content of basin is high, while the FeO+TiO2 content is about 20%-30%. in the plateau region is relatively low. The gamma ray data inversion results, Clementine inversion results were compared with laboratory data of the microwave radiation CE-2 data inversion results with the actual lunar soil, found that inversion of microwave radiation CE-2 meter data results in all results in the lunar soil and real samples of the highest correlation coefficient.
In the month of lunar data measured by radar active microwave remote sensing, in order to better analyze the measured monthly radar detection results of measured monthly radar are studied by numerical simulation and ground simulation experiment. Digital simulation, simulation of the moon on the moon radar detection results of different geological structure by GPRMax, analyzes the radar reflected wave the characteristics of different geological structure under the moon, including the lunar surface layered structure simulation, interface simulation and water ice distribution in lunar month rock simulation. On the surface of the simulation, experimental choice and lunar geological structure relatively close to the Inner Mongolia Xilinhaote area of Mount dove as the moon test field, field experiments were conducted, using ground penetrating radar simulation 60MHz and 500MHz measuring radar detection of shallow lunar month structure, through the analysis of GPR data on the volcano geological characteristics of rock are related In addition to field experiments, indoor lunar simulation and detection experiments are carried out in the surface simulation experiment. A short section designed in the laboratory is used to simulate the detection of lunar radar based on the detection depth of 500MHz lunar radar.
Finally, the measured monthly radar data were related to radar data processing, including data filtering, data registration, deconvolution and dispersion compensation, the results will be combined with the GPRMAX simulation of the surface of the detection results, measured monthly radar detection data were analyzed, obtained the thickness of lunar regolith and lunar landing sites of shallow structure.

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：P184.5

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