i Detection of Smoke and Dust Aerosols Using Multi-sensor Satellite ...

4.1 Physical Principle of Dust Aerosol Detection
4.1.1 Data collection
In order to accurately decide the bands and thresholds in the algorithm of dust
aerosol detection, more than fifty dust storm events occurred in China during 2001- 2007
(2001-2007 for Terra MODIS and 2002-2007 for Aqua MODIS) are collected as training
data for spectral analysis. The detail information of each selected dust storm event is
listed in Table 4.1, including the sensor, year, day, and UTC time. Cloud pixels and clear
pixels are also collected, written in Tables 4.2 and 4.3, based on the MODIS cloud mask
product.
Table 4.1: Dust storm events selected as training data for spectral and statistical analyses.
MODIS Year Julian/Calendar UTC MODIS Year Julian/Calendar UTC
Aqua 2002 234-08/22 06:50 Terra 2001 096-04/06 03:40
Aqua 2002 239-08/27 07:10 Terra 2001 098-04/08 05:05
Aqua 2002 290-10/17 07:40 Terra 2001 100-04/10 06:30
Aqua 2002 299-10/26 07:50 Terra 2002 106-04/16 05:15
Aqua 2003 107-04/17 07:00 Terra 2002 113-04/23 05:20
Aqua 2003 108-04/18 07:45 Terra 2002 114-04/24 06:05
Aqua 2004 120-04/30 07:40 Terra 2003 107-04/17 05:25
Aqua 2005 030-01/30 07:15 Terra 2004 329-11/24 05:05
Aqua 2005 118-04/28 06:25 Terra 2004 330-11/25 05:45
Aqua 2005 173-06/22 06:30 Terra 2005 030-01/30 05:35
Aqua 2005 176-06/25 07:00 Terra 2005 155-06/04 05:05
Aqua 2006 100-04/10 06:05 Terra 2005 17606/25 05:25
Aqua 2006 101-04/11 06:50 Terra 2006 045-02/14 05:05
Aqua 2006 103-04/13 06:40 Terra 2006 100-04/10 04:30
Aqua 2006 113-04/23 07:15 Terra 2006 101-04/11 05:10
Aqua 2006 207-07/26 07:30 Terra 2006 102-04/12 04:15
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