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VIIRS Fire Temperature RGB at 375 m resolution

An algorithm has been developed to downscale the VIIRS moderate resolution 2.25 μm band (M-11) to imagery band resolution, allowing for the production of the Fire Temperature RGB at 375 m resolution, instead of the normal 750 m resolution. This algorithm also makes use of the 375 m resolution I-band Active Fire product logic to account for saturation and radiance foldover issues that are prevalent in the 375 m midwave IR channel on VIIRS (I-4). A comparison between the new I-band Fire Temperature RGB and the original version (using only moderate resolution VIIRS bands) is shown in the figure below for fires observed in central Yukon Territory, Canada in 2019. The improved resolution in the I-band Fire Temperature RGB will help pinpoint the locations of active fires with increased accuracy, and is expected to benefit the detection of small fires that might not be apparent in the 750 m resolution imagery. The Active Fire product developers have already shown that the I-band version of the Active Fire product detects more fires than its moderate resolution counterpart. (POC: C. Seaman, CIRA, Curtis.Seaman@colostate.edu) Funding: JPSS