3 Day PM2.5 derived from VIIRS AOT and AIRNOW PM2.5
3 day PM2.5 derived from VIIRS AOT and AIRNOW PM2.5 shows 3 day animation satellite derived PM2.5, AIRNOW PM2.5, fire radiative power (FRP) overlaid on RGB image. PM2.5 (Particulate Matter with diameter greater than 2.5 $\mu m$) is estimated from VIIRS AOT through predefined regression relation, which are derived through model simulations as described in van Donkelaar et al. (2010).The AOT-estimated PM2.5 and AirNow PM2.5 datasets use the same color coding scale, so the agreement/disagreement between satellite and ground observations indicate how well the VIIRS instrument is capturing surface aerosol concentrations.
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