Flown on NOAA Polar Orbiting Environmental Satellites, the Advanced Very High Resolution Radiometer (AVHRR) measures electromagnetic radiation (light reflected and heat emitted) from our planet. AVHRR was originally intended only as a meteorological satellite system but it does have applications for fire monitoring. AVHRR remotely senses cloud cover and sea surface temperature, enabling its visible and infrared detectors to observe trends in vegetation, clouds, shorelines, lakes, snow and ice. The visible bands can detect smoke plumes from fires as well as burn scars. The thermal infrared band can detect actual hotspots and active fires. Its ability to detect fires is greater at night, since the system can confuse active fires with heated ground surfaces, such as beach sand and asphalt.
|GEOMAC DATA UPDATED:|
Thermal AVHRR 25JUN2002:1308 (GMT); Thermal MODIS 06/23/2002; Fire Perimeters 2002-06-25; Sit Reports 2002-06-25 00:00:00
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