Product is composite global field of Aerosol Optical Thickness based on one month of data of aerosol optical thickness retrievals over the oceans. It is derived from AVHRR channel 1 and has a resolution of 100 km. The optical thickness at each gridpoint is the average of the optical thicknesses calculated for each week within the month at that gridpoint.

Product provides aerosol optical depth (AOD) using GOES visible channel imagery and utilizes a cloud screening algorithm. A look-up table is used to estimate the AOD using the difference in reflectance between current cloud free pixels and those of a 28 day clear sky composite image. Over the GASP-East domain, the automated smoke detection and tracking algorithm (ASDTA) uses a source apportionment technique to derive AOD associated with fires.

The GOES-E/W Biomass Burning Emission Product (GBBEP) algorithm calculates emissions (PM2.5, CO, CH4, CO2, TNMHC, NH3, N2O, NOX, and SO2) released from biomass burning fire detections and uses the GOES WF_ABBA (Wildfire Automated Biomass Burning Algorithm) fire product as input. The WF_ABBA detects instantaneous fires in sub-pixels using 3.9 µm and 10.7 µm infrared bands by assuming that the thermal radiance in a 4 km pixel is a linear mixture of radiance from a fire target and background. The GBBEP uses GOES-11/12 WF_ABBA sub-pixel fire sizes to generate diurnal patterns taken as the proxy of burned areas for every hour of the previous day.

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