The Sand fire, in the mountains northwest of Los Angeles, has burned more than 39,000 acres, destroyed 18 houses, and caused one fatality. By August 1, 2016, when the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra spacecraft acquired this image, the fire was more than 90 percent contained. The fire began 10 days earlier in a brushy area near Highway 14. It grew explosively to thousands of acres, driven by high winds and temperatures over 100 degrees Fahrenheit. At one time, more than 20,000 residents were evacuated from their homes. In this image, vegetation is displayed in red, and the burn area is dark grey to black. The image covers an area of 16.4 by 19.4 miles (26.4 by 31.3 kilometers), and is located at 34.4 degrees north, 118.3 degrees west.
With its 14 spectral bands from the visible to the thermal infrared wavelength region and its high spatial resolution of 15 to 90 meters (about
50 to 300 feet), ASTER images Earth to map and monitor the changing surface of our planet. ASTER is one of five Earth-observing
instruments launched Dec. 18, 1999, on Terra. The instrument was built by Japan's Ministry of Economy, Trade and Industry. A joint
U.S./Japan science team is responsible for validation and calibration of the instrument and data products.
The broad spectral coverage and high spectral resolution of ASTER provides scientists in numerous disciplines with critical information for
surface mapping and monitoring of dynamic conditions and temporal change. Example applications are: monitoring glacial advances and
retreats; monitoring potentially active volcanoes; identifying crop stress; determining cloud morphology and physical properties; wetlands
evaluation; thermal pollution monitoring; coral reef degradation; surface temperature mapping of soils and geology; and measuring surface
The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science
Mission Directorate, Washington, D.C.
More information about ASTER is available at http://asterweb.jpl.nasa.gov/.