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The CAMS Global Fire Assimilation System (GFAS) assimilates fire radiative power (FRP) observations from satellite-based sensors to produce estimates of biomass burning emissions. FRP observations currently assimilated in CAMS GFAS are MODIS and VIIRS active fire products (https://ladsweb.modaps.eosdis.nasa.gov/). The rate of release of thermal radiation by a fire is believed to be directly related to the rate at which fuel is being consumed and smoke produced. Therefore, these FRP data are used (after screening for spurious signal) in the global estimation of open vegetation fire trace gas and particulate emissions. GFAS includes also information about injection heights derived from the same FRP observations combined with meteorological information from the ECMWF operational weather forecast.
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