VIIRS 3 Day Smoke Mask Movie
VIIRS 3 day smoke mask movie shows 3 day animation of VIIRS smoke mask, fire radiative power (FRP) overlaid on RGB image. Smoke mask in shades of pink (light pink for thin smoke and bright pink for thick smoke; see scale on the top) overlaid on the true color image (also called as RGB for Red Green Blue wavelengths). Because the RGB image is derived from visible wavelengths, it looks like a picture.
The pink-colored smoke mask is a qualitative indicator of smoke originating from burning fires in the region or transported smoke from upwind regions. The smoke mask is derived using spectral and spatial threshold tests based on VIIRS measurements in the visible and infrared wavelengths. More information on the smoke mask algorithm is available in the Documents link in the menu bar on the left side of the eIDEA homepage.
Red dots on the image are fire hot spots, which indicate the locations of fires sensed by VIIRS. The quantitative measure of "fire temperature" is given by the Fire Radiative Power (FRP), which is indicated by the size of the dots (scale on the top); larger dots correspond to larger values of FRP. The FRP hot spots can be turned on/off by clicking on the FRP button in the menu to the right of the imagery.
Users can select region of interest by clicking the icons at the bottom of this page. Seven regions can be selected: Southwest, Northwest, Southeast, Northeast, Mid-Atlantic, CONUS, and CONUS+Canada. The default region is CONUS.