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高光谱遥感影像的大气订正应用研究

发表时间:2008-03-31  浏览量:1482  下载量:748
全部作者: 杨校军,杨春玲
作者单位: 哈尔滨工业大学电气工程及自动化学院;北京遥感信息研究所
摘 要: 在卫星遥感成像过程中,地物的辐射信息受到大气分子和气溶胶粒子的散射和吸收,将会直接影响遥感的精度。对于高光谱定量遥感来说,大气辐射校正显得极为重要。鉴于地-气辐射传输模型的复杂性,对大气进行精确而完备的建模并求解十分困难。针对辐射传输方程求解困难、计算量大、不利于工程实现的问题,本文提出协同利用辐射传输方程求解和图像自身信息提取的综合模式,该模式以辐射传输求解为基础,并结合实际情况将图像自身信息参与修正过程,这种方法结合了两种方法的优点,可较为快速和准确地进行计算,易于工程应用。该方案选取大气成分、气溶胶、双向反射分布函数、邻近效应与程辐射作为影响高光谱遥感成像的关键因素进行研究与分析,分别给出了计算方法并进行了程序实现。本文提出的方案得到了实验室仿真数据与部分实际机载高光谱图像数据的验证,工程化后的测试表明该方法达到了工程预期设计要求。
关 键 词: 摄影测量与遥感;大气辐射校正;高光谱;定量遥感
Title: Atmospheric correction research and its application on hyperspectral image sensing images
Author: YANG Xiaojun, YANG Chunling
Organization: School of Electrical Engineering and Automation, Harbin Institute of Technology;Beijing Remote Sensing Institute
Abstract: The precision of RS imaging and measuring is affected directly by the atmosphere during imaging process due to the atmospheric molecular and aerosol scattering and absorbing the target radiance. For hyperspectral quantitative remote sensing, it is very important to do the atmospheric corrections. Because of the complexity of the radiative transfer model of the earth-atmosphere system, it is very hard to modeling it and to solving it accurately and completely. According to the problems such as hard to solve the radiative transfer equations, huge computing quantity, goes against engineering, the paper put forward a new atmospheric radiation correction solution that use the modeling and solving method cooperate with image information. This method based on solving the radiative transfer equations, and introduced a process of revision using the image information practically. The method combined the advantages of the two methods that former discussed, it calculated fast and accurately, and easy to use in engineering applications. The solution selected five key points to study and analyse, atmospheric composition, aerosol, BRDF, adjacency effect, path radiance. The solution gave the calculation methods and done the program realizations. The solution was verified by some simulate data and real airborne images. And the solution used in a real project, the conclusions of that project showed the solution was identical to the expectation.
Key words: photogrammetry and remote sensing; atmospheric radiation correction; hyperspectral; quantitative remote sensing
发表期数: 2008年7月第6期
引用格式: 杨校军,杨春玲. 高光谱遥感影像的大气订正应用研究[J]. 中国科技论文在线精品论文,2008,1(6):628-633.
 
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