Status Report

Mars Odyssey THEMIS Image: Eroded Crater Ejecta

By SpaceRef Editor
June 3, 2003
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Medium image for 20030603a

Image Context:

Context image for 20030603a
Context image credit: NASA/Mars Orbiter Laser Altimeter (MOLA) Team
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Two craters in Arabia Terra, in the old cratered highlands, are surrounded by many small
mesas. The two craters are partially shown in the central-left and extreme upper-right of
the image. These mesas are remnants of ejecta blankets of debris that were cast out when
the impact craters originally formed. These former ejecta blankets formed a material resistant
to weathering, and so they remain on the surface as mesas, while the surrounding terrain has
been stripped away.

[Source: ASU THEMIS Science Team]

Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

NASA’s Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA’s Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

Image Credit: NASA/JPL/Arizona State University

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ParameterValue ParameterValue
Latitude17.1 &nbsp InstrumentVIS
Longitude8E (352W) &nbsp Resolution (m)19
Image Size (pixels)3194×1421 &nbsp Image Size (km)60.7×27

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