Normalized Burn Ratio (NBR)

"The Normalized Burn Ratio Index (NBRI) uses the NIR and SWIR bands to emphasize burned areas, while mitigating illumination and atmospheric effects. Your images should be corrected to reflectance values before using this index.

NBR = (NIR - SWIR) / (NIR+ SWIR)

    NIR = pixel values from the near infrared band
    SWIR = pixel values from the short-wave infrared band

Reference: Key, C. and N. Benson, N. "Landscape Assessment: Remote Sensing of Severity, the Normalized Burn Ratio; and Ground Measure of Severity, the Composite Burn Index." FIREMON: Fire Effects Monitoring and Inventory System, RMRS-GTR, Ogden, UT: USDA Forest Service, Rocky Mountain Research Station (2005)." (ESRI, 2018)