Fwd = Mars Odyssey THEMIS Image Of Naktong Valles - April 4, 2002
- Forwarded by: fwestra@... (Frits Westra)
Originally from: baalke@...
Original Subject: Mars Odyssey THEMIS Image Of Naktong Valles - April 4, 2002
Original Date: Thu, 4 Apr 2002 09:45:56 -0800 (PST)
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Mars 2001 Odyssey
Thermal Emission Imaging System (THEMIS)
Naktong Valles (Released 4 April 2002)
This image is located in a cratered highland region called Arabia Terra.
The center right side of the image shows a branch of the valley network
Naktong Vallis cutting into the eastern rim of an unnamed crater. A
simple sequence of geologic events can be ascertained from this image.
Early on in time this surface was subjected to bombardment from asteroids
and comets thereby creating the pockmarked highlands. This was followed
by channel incision into the former rim of the large crater seen near
the center of this image. The last series of events to occur in this
image are primarily aeolian (wind) related. These include the dark
streaks seen on slopes. Numerous dark streaks coursing down the slopes
of crater and channel walls suggests that the relatively bright dust
which mantles the slopes slides downhill and either exposes a dust-free
darker surface or creates a darker surface by increasing its roughness.
Note: This 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
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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