Hi,
I am trying to determine the total number of L2 AOD input pixels used to generate the MODIS L3 AOD SDS: 'AOD_550_Dark_Target_Deep_Blue_Combined_Mean_Mean'.
I noticed that the SDS 'AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts' provides counts within five histogram bins with boundaries: 0.0, 0.1, 0.3, 0.6, 1.5, and 5.0.
Is there a way to compute the total count of L2 pixels contributing to the L3 AOD product using this information?
Thank you for your guidance!
Total Number of L2 AOD Input Pixel Counts in MODIS L3 AOD
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Re: Total Number of L2 AOD Input Pixel Counts in MODIS L3 AOD
We looked into MODIS L3 AOD (MOD08_D3) data,
long AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts ( Deep_Blue_Aerosol_Optical_Depth_Land_Histo_Intervals:mod08 , YDim:mod08 , XDim:mod08 ) ;
AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts:long_name = "Combined Dark Target and Deep Blue AOD at 0.55 micron for land and ocean: L2 Input Pixel Counts at 5 intervals" ;
Where: the dimension sizes are
Deep_Blue_Aerosol_Optical_Depth_Land_Histo_Intervals:mod08 = 5 ;
XDim:mod08 = 360 ;
YDim:mod08 = 180 ;
To compute the total count of L2 pixels contributing to L3 AOD product,
L2_total_pixels (180, 360) = sum(AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (1:5, 180, 360))
i.e.,
L2_total_pixels (180,360) = AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (1,180,360) + AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (2,180,360) + …… + AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (5,180,360)
long AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts ( Deep_Blue_Aerosol_Optical_Depth_Land_Histo_Intervals:mod08 , YDim:mod08 , XDim:mod08 ) ;
AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts:long_name = "Combined Dark Target and Deep Blue AOD at 0.55 micron for land and ocean: L2 Input Pixel Counts at 5 intervals" ;
Where: the dimension sizes are
Deep_Blue_Aerosol_Optical_Depth_Land_Histo_Intervals:mod08 = 5 ;
XDim:mod08 = 360 ;
YDim:mod08 = 180 ;
To compute the total count of L2 pixels contributing to L3 AOD product,
L2_total_pixels (180, 360) = sum(AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (1:5, 180, 360))
i.e.,
L2_total_pixels (180,360) = AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (1,180,360) + AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (2,180,360) + …… + AOD_550_Dark_Target_Deep_Blue_Combined_Histogram_Counts (5,180,360)
Regards,
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Re: Total Number of L2 AOD Input Pixel Counts in MODIS L3 AOD
Thank you very much. I was thinking in the same direction. Great help!