Sentinel-3 SLSTR active fire detection and FRP product: Pre-launch algorithm development and performance evaluation using MODIS and ASTER datasets

► Description of the active fire-related capabilities of a major new sensor - SLSTR. ► Full description of the SLSRT active fire algorithm. ► Results from alg. as applied to MODIS and compared to 'MOD14' fire products. ► Independent performance evaluation made using ASTER data. ► SLSTR alg. detects ~ 1/3rd more true active fire pixels than MOD14.