Earthdata Forum

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!

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)

Thank you very much. I was thinking in the same direction. Great help!