where, x is AOT value in digital number (DN), it
should be multiplied by a scale factor of 0.001 to be AOT physical parameter, and then can be converted
to PM10 value. We apply this equation to convert AOT to PM10, even though the correlation is fairly small
(correlation = 0.32), but since it was generated from the data collected from 12 stations located in the
study area within the period of 4 years from 2007 to 2010. Figure 2 shows the quick look image of the
MODIS AOT map (a) and the estimated PM10 concentration (b) generated from the MODIS AOT map
for Southeast Asia region.