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基于MODIS数据的沙漠化地区地表宽波段反照率反演方法研究——以新疆沙漠化地区为例

发表时间:2009-12-31  浏览量:1797  下载量:553
全部作者: 赵君,霍艾迪
作者单位: 长安大学环境科学与工程学院;西北农林科技大学资源与环境学院;陕西汉江水电勘测设计有限公司
摘 要: 以新疆地区的中等分辨率成像光谱仪(moderate resolution imaging spectroradiometer, MODIS)遥感图像数据和地表野外同步观测的光谱数据为例,在野外数据量较少且有定标数据的条件下反演地表反照率。在窄波段反照率与宽波段反照率之间存在线性关系的前提下,通过与相同时段MODIS图像数据的窄波段反照率建立多元线性回归方程,构建回归模型,实现窄波段到宽波段的反演。应用该回归模型对新疆沙漠化地区的地表反照率进行反演验证,经统计分析,结果证明此方法简便可行,精度较高。
关 键 词: 环境学;反照率;中分辨率成像光谱仪;入射光通量;反射光通量
Title: Research on the retrieval method for the surface broadband albedo in desertification area with MODIS data: a case study in Xinjiang aeolian desertification regions
Author: ZHAO Jun, HUO Aidi
Organization: School of Environmental Science & Engineering, Chang’an University;College of Resources and Environment, Northwest Sci-Tech University of Agriculture and Forestry;Shaanxi Hanjiang River Hydropower Survey and Design Co., Ltd.
Abstract: Taking the moderate resolution imaging spectroradiometer(MODIS) remote sensing image data and spectral data from surface field synchronous observation in Xinjiang as an example, this research retrieved surface albedo with the little amount of data and the data had been calibrated. Under the linear relationship between narrow band albedos and broadband albedos, by setting up multiple linear regression equation with the narrow-band albedo of the same time MODIS image data, it achieved retrieval from narrow-band to broadband albedo. The conversion of broadband albedos was fulfilled finally. The regression model was tested for the desertification region of Xinjiang using MODIS image data and synchronous observed surface spectral data based on the above conversion algorithm. The results show that the method is convenient and feasible under a specific surface/atmospheric condition.
Key words: environmentology; albedo; moderate resolution imaging spectroradiometer; incident light flux; reflected light flux
发表期数: 2009年12月第24期
引用格式: 赵君,霍艾迪. 基于MODIS数据的沙漠化地区地表宽波段反照率反演方法研究——以新疆沙漠化地区为例[J]. 中国科技论文在线精品论文,2009,2(24):2613-2618.
 
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