VIIRS, a scanning radiometer, collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS data is used to measure cloud and aerosol properties, ocean color, sea and land surface temperature, ice motion and temperature, fires, and Earth's albedo. Climatologists use VIIRS data to improve our understanding of global climate change.
- Mass: Approximately 275 kilograms
- Average Power: 200 Watts
- Development Institutions: Raytheon Company
- Purpose: To collect measurements of clouds, aerosols, ocean color, surface temperature, fires, and albedo.
Learn more: https://jointmission.gsfc.nasa.gov/viirs.html
S-NPP/VIIRS Active Fire Algorithm
The NASA Suomi-NPP VIIRS Active Fire product suite builds on the MODIS Fire and Thermal Anomalies algorithm (MOD14/MYD14), systematically mapping global fire activity at ≤12 h intervals (~1:30am/pm local overpass times). Two VIIRS active fire products are generated independently using the available 750 m and 375 m resolution data. The 750 m fire product is a replica of the MODIS Collection 6 algorithm, which was adapted to VIIRS channels M5, M7, M11, M13, M15, M16. The product comprises active fire detection and characterization (fire radiative power [FRP]) over land and water (e.g., gas flares). The 750 m product, most importantly, provides continuity with the Earth Observing System (EOS) Moderate Resolution Imaging Spectroradiometer (MODIS) 1 km product.