The majority of craters in this nighttime IR image appear as bright (warm) rings surrounding dark (cooler) centers. The dark "tails" of the craters are windstreaks. The crater rims are providing a wind-shadow, protecting the dust/fines on the downwind side of the crater. The wind has removed the dust cover from the surroundings, revealing the rockier/warmer surface. These craters are located in Syrtis Major.

Image information: IR instrument. Latitude 1.3, Longitude 68.8 East (291.2 West). 100 meter/pixel resolution.

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.