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Channeled Scablands, Washington

Sept. 11, 2023

The Channeled Scablands in Washington were formed about 19,000 years ago when glacial Lake Missoula in Montana burst through its ice dam, and a 320 m deep lake emptied in a catastrophic flood that reached the Pacific Ocean. The basaltic terrain of Washington was deeply carved into channels, mesas, and giant dunes as the water scoured the landscape. The image was acquired August 4, 2021, covers an area of 40.2 by 48.8 km, and is located at 47.5 degrees north, 119.2 degrees west.

With its 14 spectral bands from the visible to the thermal infrared wavelength region and its high spatial resolution of about 50 to 300 feet (15 to 90 meters), 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 heat balance.

The U.S. science team is located at NASA's Jet Propulsion Laboratory in Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate, Washington.

More information about ASTER is available at http://asterweb.jpl.nasa.gov/.

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Mission
Target
  • Earth's Surface and Atmosphere
Spacecraft
  • Terra
Instrument
  • Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER)
Credit
NASA/METI/AIST/Japan Space Systems, and U.S./Japan ASTER Science Team

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