本文關(guān)鍵詞：基于光學(xué)成像的4179小行星表面反射特性研究　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 4179小行星 嫦娥二號(hào)探測(cè)器 表面反射特性 反照率 輻射定標(biāo)與校正

【摘要】：2012年12月13日,我國(guó)的月球探測(cè)器嫦娥二號(hào)在距地球約700萬(wàn)公里的深空,以10.73km/s的速度770m的最近距離成功飛掠4179小行星Toutatis,獲得了最高分辨率優(yōu)于3m的系列可見(jiàn)光圖像,在國(guó)際上首次獲得4179小行星的清晰影像。本文擬通過(guò)對(duì)成像相機(jī)輻射定標(biāo)數(shù)據(jù)處理,獲取成像時(shí)刻4179小行星表面真實(shí)輻射亮度來(lái)研究4179小行星表面反射特性,具體內(nèi)容如下:(1)使用1.6m積分球和光譜輻射計(jì)獲取對(duì)4179小行星成像的嫦娥二號(hào)太陽(yáng)翼監(jiān)視相機(jī)的備份產(chǎn)品進(jìn)行輻射定標(biāo),獲得了十個(gè)輻亮度等級(jí)R、G、B三譜段的相機(jī)輻射定標(biāo)數(shù)據(jù)。(2)應(yīng)用最小二乘擬合方法,對(duì)相機(jī)輻射定標(biāo)數(shù)據(jù)進(jìn)行處理,獲取相對(duì)定標(biāo)校正矩陣,校正原始定標(biāo)數(shù)據(jù)和4179小行星圖像,以降低由于器件原因?qū)е碌南裨憫?yīng)不一致的問(wèn)題。用校正后的定標(biāo)數(shù)據(jù)獲取絕對(duì)定標(biāo)系數(shù),將該系數(shù)應(yīng)用于校正后的小行星圖像,反演成像時(shí)刻4179小行星表面真實(shí)輻射亮度,獲得成像時(shí)刻4179表面輻射亮度分布圖。(3)基于表壤的輻射傳輸理論,研究4179小行星表面反射特性。由于嫦娥二號(hào)對(duì)4179小行星成像的特殊性,本文從反射率定義標(biāo)準(zhǔn)出發(fā),根據(jù)Hapke對(duì)Nicodemus半球反射率的定義標(biāo)準(zhǔn)在行星科學(xué)應(yīng)用中的描述,結(jié)合成像時(shí)刻4179小行星與太陽(yáng)的距離、表面太陽(yáng)光譜輻照度、成像光線條件等信息,獲得4179小行星表面平均光譜反照率及表面反照率分布圖�；诳臻g光學(xué)成像的行星表面反射特性研究方法,在行星科學(xué)研究中有應(yīng)用價(jià)值。本文首次嘗試使用基于空間光學(xué)成像的方法獲得4179小行星表面光譜反照率及4179小行星的表面反照率分布圖。這些數(shù)據(jù)可以為進(jìn)一步分析小行星表面的局部光學(xué)特性以及形態(tài)學(xué)特征等提供有力支持,這對(duì)4179小行星科學(xué)研究有重要意義。
[Abstract]:In December 13, 2012, China's lunar probe Chang'e two in about 7 million kilometers away from the earth to the nearest distance of deep space, the speed of 10.73km/s 770m's successful flyby of asteroid 4179 Toutatis, a series of visible images obtained the highest resolution is better than 3m, get a clear image of the asteroid 4179 for the first time in the world. This paper through the imaging camera calibration data processing, get the imaging time 4179 asteroid surface real radiation brightness to study the 4179 reflection surface of the asteroid characteristics, the specific contents are as follows: (1) using 1.6m and integrating sphere spectral radiometer gets two Sun Wing surveillance camera to chang e asteroid 4179 backup radiometric imaging products standard, get ten radiance class R, G, B three spectral camera radiometric calibration data. (2) least squares fitting method is applied to process the radiometric calibration data of the camera, get the relative calibration correction matrix, correct the original calibration data and the 4179 asteroid image, so as to reduce the problem of pixel response due to device failure. The absolute calibration coefficient is obtained from corrected calibration data. The coefficient is applied to corrected asteroids, and the real radiance of the 4179 asteroids at the imaging time is retrieved, and the radiance distribution map of the 4179 surface is obtained. (3) based on the radiative transfer theory of surface soil, the surface reflection characteristics of 4179 asteroid are studied. The Chang'e two on the 4179 asteroid imaging particularity, this paper from the definition of reflectivity of Nicodemus Hapke, according to the criteria described in the hemisphere reflectivity using planetary science, combined with the imaging time 4179 asteroids from the sun, the surface of the solar spectral irradiance, imaging light conditions and other information, to obtain 4179 asteroid surface average spectral albedo the rate and surface albedo map. The research method of planetary surface reflection based on spatial optical imaging is of great value in the research of planetary science. In this paper, the spectral albedo of 4179 asteroid surfaces and the surface albedo distribution of 4179 asteroids are obtained by using the spatial optical imaging method for the first time. These data can provide strong support for further analysis of the local optical characteristics and morphological characteristics of asteroids, which is important for the scientific research of 4179 asteroids.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P185.7;V445.8

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相關(guān)期刊論文 前1條

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本文編號(hào)：1338762