Image Context: |
 | | Context image credit: NASA/Mars Orbiter Laser Altimeter (MOLA) Team | [ Find on map: Javascript version ]
| | [ Find on map: CGI version ] |
In western Acidalia, two craters of similar size (a few kmís)
dramatically display the effects of geologic activity. The younger one
on the left has been left relatively well preserved, retaining a sharp
rim crest, a classic bowl shape, and a clearly defined ejecta blanket.
The older one on the right likely has experienced a flood of lava that
covered over the ejecta and filled in the bowl (note the breach in the
rim). Its rim crest has been worn down by a multitude of subsequent
impacts.
[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 |
