本文選題：大尺度粗糙度 + 小尺度粗糙度　； 參考：《華中科技大學(xué)》2012年碩士論文

【摘要】：探測(cè)月壤厚度對(duì)月球資源的開發(fā)和利用有重要的研究?jī)r(jià)值，建立完善準(zhǔn)確的亮溫輻射傳輸模型是反演的關(guān)鍵。月壤表面粗糙度是研究的難點(diǎn)之一，考慮粗糙度對(duì)輻射亮溫的影響也是待研究解決的問題，也是本文的研究對(duì)象。本文以國(guó)家863高科技項(xiàng)目重大研究課題探月工程為依托，研究月表粗糙度與月表微波輻射亮度溫度之間的關(guān)系模型，并以嫦娥二號(hào)衛(wèi)星攜帶的微波輻射計(jì)探測(cè)的亮溫?cái)?shù)據(jù)作為檢驗(yàn)?zāi)Ｐ驼_性的依據(jù)。 本文首先結(jié)合嫦娥一號(hào)激光高度計(jì)7km分辨率的高程數(shù)據(jù)解析Apollo著陸點(diǎn)地區(qū)56k m×56km范圍內(nèi)的地形粗糙度信息。接著將大尺度的粗糙度對(duì)有效太陽輻照度的修正運(yùn)用到熱傳導(dǎo)方程的邊界條件中，建立大尺度粗糙面分層模型求解月壤溫度剖面。月表即使大范圍內(nèi)平坦（例如月海），也會(huì)有微小的起伏，這種起伏通常在厘米甚至毫米級(jí)，與高頻（如19.35GHz）入射波的波長(zhǎng)可比擬。根據(jù)輻射傳輸理論和粗糙面隨機(jī)散射理論，運(yùn)用二階微擾法，建立上界面為粗糙面的分層微波輻射傳輸亮溫模型。這樣將大尺度的溫度剖面計(jì)算模型和小尺度的亮溫輻射傳輸模型結(jié)合起來建模，使模型對(duì)不同的月表地形特征更具有通用性。 計(jì)算結(jié)果表明，月球表面的大尺度粗糙度使太陽輻照減小，從而使月壤剖面的溫度降低，月表輻射亮溫也隨著粗糙度的增加而降低。微波輻射計(jì)四個(gè)通道中，3GHz頻段的波長(zhǎng)最長(zhǎng)，對(duì)月壤的穿透深度最大，因此這個(gè)頻段的模擬亮溫對(duì)反演月壤厚度具有很大的價(jià)值。小尺度粗糙度的引入使月表輻射亮溫增加，，在3GHz、7.8GHz和更高頻率19.35GHz，模擬亮溫值與嫦娥二號(hào)實(shí)測(cè)亮溫值相比差距更小。
[Abstract]:The exploration of lunar soil thickness is of great value to the development and utilization of lunar resources. The key to inversion is to establish a perfect and accurate radiative transfer model of bright temperature. The surface roughness of lunar soil is one of the difficulties in the study. It is also a problem to be solved to consider the influence of roughness on the radiant brightness temperature, which is also the research object of this paper. In this paper, based on the lunar exploration project of the national 863 high-tech project, the relationship between the surface roughness and the temperature of microwave radiation is studied. The bright temperature data detected by the microwave radiometer carried by Chang 'e-2 satellite are taken as the basis for checking the correctness of the model. In this paper, the height data of the 7km resolution of the Chang 'e-1 laser altimeter are firstly used to analyze the terrain roughness information in the area of the Apollo landing site in the range of 56km 脳 56km. Then the large scale roughness correction to the effective solar irradiance is applied to the boundary condition of the heat conduction equation, and a large scale rough surface stratification model is established to solve the lunar soil temperature profile. Even if the moon surface is flat in a wide range (for example, the moon sea), there will be small fluctuations, usually in centimeters or millimeters, comparable to the wavelength of high frequency (such as 19.35 GHz) incident waves. According to the radiation transfer theory and the rough surface random scattering theory, using the second-order perturbation method, a laminar microwave radiation transmission bright temperature model with the upper interface as a rough surface is established. In this way, the large scale temperature profile calculation model and the small scale bright temperature radiation transfer model are combined to model the model, which makes the model more general for different monthly surface topographic features. The calculated results show that the large scale roughness of the lunar surface decreases the solar irradiation, thus reducing the temperature of the lunar soil profile, and the radiant brightness temperature of the lunar surface decreases with the increase of the roughness. The wavelength of 3 GHz band is the longest and the penetration depth of the lunar soil is the largest among the four channels of microwave radiometer, so the simulated bright temperature in this frequency band is of great value in retrieving the thickness of lunar soil. With the introduction of small scale roughness, the radiant brightness temperature of the monthly surface is increased, and the difference between the simulated brightness temperature and the measured light temperature of Chang 'e-2 is smaller at the frequency of 7.8GHz and higher frequency of 19.35GHz.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：P184.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 孟治國(guó);陳圣波;劉財(cái);杜曉娟;呂航;;非均勻月壤介質(zhì)的被動(dòng)微波輻射傳輸模擬[J];吉林大學(xué)學(xué)報(bào)(地球科學(xué)版);2008年06期

2 李雄耀;王世杰;程安云;;月表有效太陽輻照度實(shí)時(shí)模型[J];地球物理學(xué)報(bào);2008年01期

3 徐建良,湯炳書;一維熱傳導(dǎo)方程的數(shù)值解[J];淮陰師范學(xué)院學(xué)報(bào)(自然科學(xué)版);2004年03期

4 王振占;李蕓;張曉輝;姜景山;胥傳東;張德海;郭偉;;“嫦娥一號(hào)”衛(wèi)星微波探測(cè)儀數(shù)據(jù)處理模型和月表微波亮溫反演方法[J];中國(guó)科學(xué)(D輯:地球科學(xué));2009年08期

5 歐陽自遠(yuǎn);李春來;鄒永廖;張洪波;呂昌;劉建忠;劉建軍;左維;蘇彥;溫衛(wèi)斌;邊偉;趙葆常;王建宇;楊建峰;常進(jìn);王煥玉;張曉輝;王世金;汪敏;任鑫;牟伶俐;孔德慶;王曉倩;王芳;耿良;張舟斌;鄭磊;朱新穎;鄭永春;李俊鐸;鄒小端;許春;施碩彪;高亦菲;高冠男;;繞月探測(cè)工程的初步科學(xué)成果[J];中國(guó)科學(xué):地球科學(xué);2010年03期

6 法文哲;金亞秋;;三層月壤模型的多通道微波輻射模擬與月壤厚度的反演[J];空間科學(xué)學(xué)報(bào);2007年01期

7 金亞秋;法文哲;;“嫦娥一號(hào)”對(duì)環(huán)形山起伏非均勻月表層微波輻射觀測(cè)的理論建模分析[J];科學(xué)通報(bào);2010年20期

8 藍(lán)愛蘭,張升偉;利用微波輻射計(jì)對(duì)月壤厚度進(jìn)行研究[J];遙感技術(shù)與應(yīng)用;2004年03期

9 法文哲;金亞秋;;月球表面多通道輻射亮度溫度的模擬與月壤厚度的反演[J];自然科學(xué)進(jìn)展;2006年01期

相關(guān)博士學(xué)位論文 前3條

1 胥濤;利用反射光譜和熱輻射探測(cè)月球表面物質(zhì)的理論和方法[D];中國(guó)科學(xué)院研究生院（地球化學(xué)研究所）;2004年

2 鄭永春;模擬月壤研制與月壤的微波輻射特性研究[D];中國(guó)科學(xué)院研究生院（地球化學(xué)研究所）;2005年

3 孟治國(guó);月壤參數(shù)的輻射傳輸模擬與查找反演技術(shù)研究[D];吉林大學(xué);2008年

相關(guān)碩士學(xué)位論文 前1條

1 王叢叢;粗糙月面微波輻射亮溫建模與計(jì)算[D];華中科技大學(xué);2011年

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