基于MODIS数据的白天多层云检测算法  

An Algorithm for Daytime Multilayered Cloud Detection Using MODIS Data

作　　者：叶晶[1] 严卫[1] 曹巍 

机构地区：[1]解放军理工大学气象学院 [2]解放军95871部队

出　　处：《遥感技术与应用》2007年第4期570-574,共5页Remote Sensing Technology and Application

摘　　要：分析了一种利用中分辨率成像光谱仪(MODIS)数据进行白天多层云检测算法。首先利用IMAPP软件包中的云检测算法对像元区域进行云检测,然后采用红外三通道(8.5μm、11μm和12μm)技术进行云相态判识,区分出单层水云和单层冰云,最后利用2.1μm反射率和11μm亮度温度双通道散点图,计算出多层云像元在2.1μm和11μm两个通道上的取值范围,从而识别多层云系。利用该算法对热带风暴云系进行了多层云检测试验,试验结果显示算法可简单有效地识别典型的多层云系。An algorithm for daytime multilayered cloud detection using MOIDS data is presented. The algorithm is applied to pixel data from MODIS and is primarily based on the scatter plot of the near-infrared 2.1 μm channel reflectance and the 11 μm brightness temperatures. Additional information used by the algorithm includes the MODIS cloud mask from IMAPP and cloud thermodynamic phase inferred from the 8.5 μm, 11 μm and 12 μm brightness temperatures. The presented algorithm is evaluated by an multilayered cloud detection of tropical storm. The results show that the algorithm is reliably to identify areas containing typical multilayer cloud.

关 键 词：多层云 反射率 亮度温度 热带风暴 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]