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| Global Dust Remote Sensing with the FengYun-3 Satellite |
| Luo Jingning, Xu Zhe, Qi Yonggang |
| National Satellite Meteorological Center, Beijing 100081, China |
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Abstract The FengYun-3 (FY-3) series is the second generation of Chinese sun-synchronous meteorological satellites. The global observation data of FY-3 series can be implemented to monitoring and analysis of the emission, development, and transportation of the dust weather worldwide. In this paper, the Visible and InfraRed Radiometer (VIRR) data of FY-3 series satellite were used to explain the physical principles of the dust weather remote sensing, to analyze the multi-channel spectral characteristics of the dust, and to present the integrated remote sensing detection algorithm of the dust weather. The obvious histogram peak value at near-infrared channel (1.6 μm) can be applied to the dynamic identification of the dust weather. The reflection and radiation fusion characteristics of infrared channel (3.7 μm), can clearly distinguish dust from other objects. There exists difference of the absorption attenuation in the two infrared split window channels of the dry dust, this fact is meaningful for detect the weak dust. Built on the e-index of near-infrared channel (1.6 μm) and the infrared split window channel ratio index, the algorithm of dust intensity index was presented in this paper, which can indicate the global dust intensity distribution quantitatively. The instance of dust weather occurrence on the same day in four sandstorm-prone areas in the world reflects that the global observing capability of FY-3 series.
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Received: 21 April 2014
Published: 20 May 2015
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2015, Vol. 35 
