基于MODIS数据的典型能见度条件下大气透过率计算  

Calculation of Atmospheric Transmissibility of MODIS Data Under Different Levels of Meteorological Visibilities

作　　者：钱峻屏[1] 黄菲[2] 

机构地区：[1]广州地理研究所广东省遥感与GIS重点实验室 [2]中国海洋大学海洋环境学院海洋气象系,青岛266003

出　　处：《中国图象图形学报》2006年第4期575-579,T0005,共6页Journal of Image and Graphics

基　　金：国家"863"青年基金项目(2002AA639500);广东省自然科学基金项目(032212);"985"工程项目(105203200400006)

摘　　要：现有的辐射传输模型仅考虑气溶胶影响下的大气透过率,在能见度低于5km时,会给大气透过率计算带来较大的误差。本文综合考虑影响大气透过率的气溶胶和水汽因素,并利用中光谱分辨率MOD IS(moderateresolution im aging spectrorad iom eter)数据,在特征参数的空间及时间尺度变化均比较大时,对大气透过率进行了定量反演,并进一步建立了整层大气透过率与行星反照率的关系模型,为近地层大气能见度的遥感监测提供了方法。In this article, 6S model was used to calculate the satellite observing reflectivity and radiability above ocean surface with typical oceanic aerosol parameters selected. The result shows that some obvious errors will be induced when visibility drops under 5km. Then a synthetic influence on radiation transmission of aerosol and vapor was considered in ＇the radiation transmission model and equations between whole layer transmissibility and planet reflection was built. Three days of MODIS（ moderate resolution imaging spectroradiometer）data corresponding to high visibility, moderate visibility and low visibility were taken for calculation. The result shows close accordance with the observed visibility of the time. This study gives an applicable methodology for transmissibility calculation under different atmosphere condition and provides a potential method for quantitative visibility motoring with remote sensing.

关 键 词：MODIS 辐射传输方程 大气透过率 水汽 气溶胶 

分 类 号：P435[天文地球—大气科学及气象学] TN216[电子电信—物理电子学]