i am particularly interested in extracting Aerosol data from the hdf packed file. I have to do this over several years so i extract first aerosol_Type_Land witch give a alid Range: 0 to 4 (0=mixed, 1=dust, 2=sulfate, 3=smoke, 4=heavy absorbing smoke) so now i need to extract the aerosol optical depth so i can know by wavelenght comparison each one of the aerosol type percentage.... so im just asking why there is three Corrected_Optical_Depth_Land in the extract sub data set window i should mention that next to each one the a number like land "0" and land "1" so on i tried use HEG but i found only 1 Corrected_Optical_Depth_Land not 3 so what should i choose or should i extract all 3 (i guess each one represent a specific wave length or something). but the HEG tool isn't showing 3
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