摘要
利用卫星遥感监测大雾具有及时、宏观的明显优势。图像纹理信息反映了图像的灰度性质及其空间关系。通过对雾的成因、辐射特性、雾遥感基本原理的阐述,结合中国FY-1D美/国NOAA系列极轨卫星资料通道特点,分析了雾的图像纹理信息,并依据雾在可见光波段和中红外波段与云类不同的光谱特性,选用光谱通道1、通道3、通道4组合进行大雾监测。实例分析结果表明这种监测方法能较好地分离无云地表、中高云和低层云雾,从而实现白天雾的监测。
The techniques of remote sensing have advantage of macroscopics and fast. The image texture includes both gray attributes and space relationship. The cause of fog information, the radiant characters of fog and basic principles of detection by remote sensing are introduced in this paper, By analyzing spectrum features of FY - 1D/NOAA data of 5 channels, and then the specialties of fog on the image texture are analyzed, the different of fogs and clouds in visable band and the near infrared band, combined the 3rd channel and the 4th, 5th channel to monitor fog disaster. The analysis shows that the monitoring method can improve the capability of separating the land, mid-high cloud and the fog in our experiments, and the fairly good results are achieved to monitor the daytime heavy fog.
出处
《云南地理环境研究》
2008年第6期51-54,共4页
Yunnan Geographic Environment Research
关键词
大雾
遥感监测
云南
heavy fog
Yunnan
remote sensing monitoring
