Mission Mars Odyssey - 2

<h1>PIA04535: Crater Deformation</h1><div class="PIA04535" lang="en" style="width:549px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04535_context.jpg"></a><br><p>Released 20 May 2003<p>This crater is located at 37°N, a latitude far enough north that ground ice is present, and it sculpts the terrain when it moves. In this image, the western rim of the crater has been deformed from its original, presumably circular, shape. Note, however, that lobes of material and grooves (seen best at full resolution) in the crater's ejecta blanket are still pristine: perhaps ground ice moves the most on steep topography, such as on a crater rim.<p>Image information: VIS instrument. Latitude 37.6, Longitude 159.1 East (200.9) meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04535" onclick="window.open(this.href); return false;" title="Voir l'image PIA04535: Crater Deformation sur le site de la NASA">Voir l'image PIA04535: Crater Deformation sur le site de la NASA.</a></div>
PIA04535: Crater Deformation
<h1>PIA04536: Kasei Valles</h1><div class="PIA04536" lang="en" style="width:482px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04536_context.jpg"></a><br><p>Released 21 May 2003<p>Just a small part of the huge Kasei Valles outflow channel is shown in this THEMIS visible image. Still, the awesome erosive power of the water that once flowed through this channel is evident. The different erosional levels of the channel indicate that it is likely that water flowed at several levels for some time. Today the area is covered by a layer of fine martian dust. The dark streaks seen on the cliff faces are the result of dust avalanches which have exposed the underlying rock.<p>Image information: VIS instrument. Latitude 24.9, Longitude 287.4 East (72.6) meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04536" onclick="window.open(this.href); return false;" title="Voir l'image PIA04536: Kasei Valles sur le site de la NASA">Voir l'image PIA04536: Kasei Valles sur le site de la NASA.</a></div>
PIA04536: Kasei Valles
<h1>PIA04537: Channel to Nowhere</h1><div class="PIA04537" lang="en" style="width:536px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04537_context.jpg"></a><br><p>Released 22 May 2003<p>A channel-like feature roughly halfway between the Isidis Basin and Elysium Mons shows no connection to either a source region or terminal basin. It may be that this feature is not a channel at all and has instead arisen from the erosion of a once continuous layer of material into remnants that mimic a channel.<p>Image information: VIS instrument. Latitude 20.9, Longitude 105 East (255) meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04537" onclick="window.open(this.href); return false;" title="Voir l'image PIA04537: Channel to Nowhere sur le site de la NASA">Voir l'image PIA04537: Channel to Nowhere sur le site de la NASA.</a></div>
PIA04537: Channel to Nowhere
<h1>PIA04538: Isidis Planitia</h1><div class="PIA04538" lang="en" style="width:531px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04538_context.jpg"></a><br><p>Released 23 May 2003<p>Small mounds with depressions at their summits follow curvilinear trends in this portion of Isidis Planitia. While their origin is still unknown, some scientists believe that these were formed by the interaction of lava and ice. The pitted terrain in the lower portion of this image may be secondary craters.<p>Image information: VIS instrument. Latitude 11.8, Longitude 94.7 East (265.3) meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04538" onclick="window.open(this.href); return false;" title="Voir l'image PIA04538: Isidis Planitia sur le site de la NASA">Voir l'image PIA04538: Isidis Planitia sur le site de la NASA.</a></div>
PIA04538: Isidis Planitia
<h1>PIA04544: Crater in the Mangala Valles Region</h1><div class="PIA04544" lang="en" style="width:518px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04544_context.jpg"></a><br><p>Released 26 May 2003<p>Just south of the 2 km high main mass of the Medusae Fossae Formation, in a region dissected by channels, lies an unnamed crater that may have been filled by mud. A channel spills into this crater on its eastern side and may have delivered the material that now covers the floor of the crater. The subdued ridges may be wrinkle ridges in a preexisting lava flow that are now covered by a layer of sediment. The cracked surface is evidence for the subsequent deposition of mud.<p>Image information: VIS instrument. Latitude -6, Longitude 206.7 East (153.3 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04544" onclick="window.open(this.href); return false;" title="Voir l'image PIA04544: Crater in the Mangala Valles Region sur le site de la NASA">Voir l'image PIA04544: Crater in the Mangala Valles Region sur le site de la NASA.</a></div>
PIA04544: Crater in the Mangala Valles Region
<h1>PIA04545: Old Geology and New Geology</h1><div class="PIA04545" lang="en" style="width:519px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04545_context.jpg"></a><br><p>Released 28 May 2003<p>Mangala Vallis one of the large outflow channels that channeled large quantities of water into the northern lowlands, long ago on geological timescales. This valley is one of the few in the southern hemisphere, as well as one of the few west of the Tharsis bulge. A closer look at the channel shows more recent weathering of the old water channel: the walls of the channel show small, dark slope streaks that form in dusty areas; and much of the surrounding terrain has subtle linear markings trending from the upper left to the lower right, which are probably features sculpted and streamlined by the wind. Geology still shapes the surface of Mars today, but its methods over the eons have changed.<p>Image information: VIS instrument. Latitude -6, Longitude 209.6 East (150.4 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04545" onclick="window.open(this.href); return false;" title="Voir l'image PIA04545: Old Geology and New Geology sur le site de la NASA">Voir l'image PIA04545: Old Geology and New Geology sur le site de la NASA.</a></div>
PIA04545: Old Geology and New Geology
<h1>PIA04546: Grooved Terrain</h1><div class="PIA04546" lang="en" style="width:518px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04546_context.jpg"></a><br><p>Released 29 May 2003<p>Strange-looking grooved terrain overlies lava flows off of the western flank of the giant shield volcano Arsia Mons. It has recently been speculated that the large, concentric ridges are glacial features called moraines, which were deposited as a dry-bottomed glacier receded and left sand and rocks behind.<p>Image information: VIS instrument. Latitude -7.8, Longitude 230.4 East (129.6 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04546" onclick="window.open(this.href); return false;" title="Voir l'image PIA04546: Grooved Terrain sur le site de la NASA">Voir l'image PIA04546: Grooved Terrain sur le site de la NASA.</a></div>
PIA04546: Grooved Terrain
<h1>PIA04553: Lava Flows</h1><div class="PIA04553" lang="en" style="width:489px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04553_context.jpg"></a><br><p>Released 30 May 2003<p>Lava flows and channels are visible here on the eastern flanks of Ascraeus Mons. One of the channels is bordered by levees, which form as lava overflows the channel banks, cools and solidifies. The other prominent channel to the north lacks levees, suggesting it may be a collapsed lava tube, or may have an aqueous origin.<p>Image information: VIS instrument. Latitude 13.9, Longitude 262.2 East (97.8 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04553" onclick="window.open(this.href); return false;" title="Voir l'image PIA04553: Lava Flows sur le site de la NASA">Voir l'image PIA04553: Lava Flows sur le site de la NASA.</a></div>
PIA04553: Lava Flows
<h1>PIA04554: Hebes ILD</h1><div class="PIA04554" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04554_context.jpg"></a><br><p>Released 2 June 2003<p>Hebes Chasma is the northernmost canyon of the vast Valles Marineris system. It contains a 7-km thick pile of sediments known as an interior layered deposit (ILD), which is common to many of the VM canyons. This ILD shows fine layers, deep spur-and-gulley erosion, and an unusual texture on the plateau surface that may be due to dunes.<p>Image information: VIS instrument. Latitude -1.1, Longitude 283 East (77 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04554" onclick="window.open(this.href); return false;" title="Voir l'image PIA04554: Hebes ILD sur le site de la NASA">Voir l'image PIA04554: Hebes ILD sur le site de la NASA.</a></div>
PIA04554: Hebes ILD
<h1>PIA04555: Eroded Crater Ejecta</h1><div class="PIA04555" lang="en" style="width:533px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04555_context.jpg"></a><br><p>Released 3 June 2003</p><p>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.</p><p>Image information: VIS instrument. Latitude 17.1, Longitude 8 East (352 West). 19 meter/pixel resolution.</p><p>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.<p>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.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04555" onclick="window.open(this.href); return false;" title="Voir l'image PIA04555: Eroded Crater Ejecta sur le site de la NASA">Voir l'image PIA04555: Eroded Crater Ejecta sur le site de la NASA.</a></div>
PIA04555: Eroded Crater Ejecta
<h1>PIA04556: Chaotic Terrain</h1><div class="PIA04556" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04556_context.jpg"></a><br><p>Released 4 June 2003<p>Chaotic terrain on Mars is thought to form when there is a sudden removal of subsurface water or ice, causing the surface material to slump and break into blocks. The chaotic terrain in this THEMIS visible image is confined to a crater just south of Elysium Planitia. It is common to see chaotic terrain in the vicinity of the catastrophic outflow channels on Mars, but the terrain in this image is on the opposite side of the planet from these channels, making it somewhat of an oddity.<p>Image information: VIS instrument. Latitude -5.9, Longitude 108.1 East (251.9 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04556" onclick="window.open(this.href); return false;" title="Voir l'image PIA04556: Chaotic Terrain sur le site de la NASA">Voir l'image PIA04556: Chaotic Terrain sur le site de la NASA.</a></div>
PIA04556: Chaotic Terrain
<h1>PIA04557: Bizarre Crater Mound</h1><div class="PIA04557" lang="en" style="width:489px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04557_context.jpg"></a><br><p>Released 5 June 2003<p>The height of the interior mound of sediment inside this crater exceeds the crater rim heights by 900 meters (3,000 ft). This is a confounding problem. How does all this material get inside this crater and actually rise higher than its holding chamber? What is this material? Where did it come from? Why is it still here? It is exactly these kinds of enigmas that makes Mars so very interesting.<p>Image information: VIS instrument. Latitude 12.2, Longitude 26.3 East (333.7 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04557" onclick="window.open(this.href); return false;" title="Voir l'image PIA04557: Bizarre Crater Mound sur le site de la NASA">Voir l'image PIA04557: Bizarre Crater Mound sur le site de la NASA.</a></div>
PIA04557: Bizarre Crater Mound
<h1>PIA04558: Lycus Sulci</h1><div class="PIA04558" lang="en" style="width:485px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04558_context.jpg"></a><br><p>Released 6 June 2003<p>The remarkably rugged terrain that is part of a massive lobe of material extending over 700 km from the basal scarp of Olympus Mons is called sulci, which means furrows or grooves. This Latin word especially applies to the furrows on the surface of the brain, a definition that is visually fitting in the case of this image. The furrows are roughly a half to one km deep. Note the abundance of dark-toned slope streaks, which demonstrates that this is a region with significant dust accumulation.<p>Image information: VIS instrument. Latitude 21.3, Longitude 213.6 East (146.4 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04558" onclick="window.open(this.href); return false;" title="Voir l'image PIA04558: Lycus Sulci sur le site de la NASA">Voir l'image PIA04558: Lycus Sulci sur le site de la NASA.</a></div>
PIA04558: Lycus Sulci
<h1>PIA04559: Masursky Crater</h1><div class="PIA04559" lang="en" style="width:532px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04559_context.jpg"></a><br><p>Released 9 June 2003<p>The large, tilted blocks in this THEMIS visible image are chaotic terrain in Masursky Crater. Chaotic terrain is thought to occur when subsurface water is suddenly released to the surface, and the resulting loss of ground support causes the surface material to slump and break into blocks. Most of the chaotic terrain on Mars is seen in the vicinity of the large catastrophic outflow channels. Many of the outflow channels actually have chaotic terrain as their source. This chaotic terrain is the source of a small channel that connects to the much larger Tiu Valles.<p>Image information: VIS instrument. Latitude 12, Longitude 327.6 East (32.4 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04559" onclick="window.open(this.href); return false;" title="Voir l'image PIA04559: Masursky Crater sur le site de la NASA">Voir l'image PIA04559: Masursky Crater sur le site de la NASA.</a></div>
PIA04559: Masursky Crater
<h1>PIA04560: Dalmatian Terrain</h1><div class="PIA04560" lang="en" style="width:425px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04560_context.jpg"></a><br><p>Released 10 June 2003<p>The polar regions of Mars have surfaces than can show dark spots on a brighter background. These surfaces are informally called "dalmatian terrain" because of their appearance. This image shows this type of terrain in a valley within the southern polar layered deposits, not too far from the south polar cap. Elsewhere, defrosting dunes have shown a similar spotted pattern. Perhaps this "dalmatian terrain" is a distinctive pattern that forms over all defrosting patches of sand.<p>Image information: VIS instrument. Latitude -70.7, Longitude 354.2 East (5.8 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04560" onclick="window.open(this.href); return false;" title="Voir l'image PIA04560: Dalmatian Terrain sur le site de la NASA">Voir l'image PIA04560: Dalmatian Terrain sur le site de la NASA.</a></div>
PIA04560: Dalmatian Terrain
<h1>PIA04561: Destination: Gusev</h1><div class="PIA04561" lang="en" style="width:515px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04561_context.jpg"></a><br><p>Released 11 June 2003<p>Yesterday, a Delta II rocket successfully lifted off from Cape Canaveral, Florida carrying the Mars Exploration Rover named Spirit. Its destination is a crater called Gusev in the southern hemisphere of Mars. This crater may have been the site of an ancient lake whose sediments could be sampled by Spirit. The THEMIS image covers a portion of the center of the elliptical region in which the rover is expected to land nearly seven months from now. The scene contains wispy dark streaks that probably arise from the removal by wind of a layer of bright dust. Just to the south of the dark streaks is a boundary that may represent the edge of a layer of material that has flowed in from the south. With luck, Spirit will have access to a variety of interesting rock types and terrains that will settle the question of whether Gusev crater hosted a lake.<p>Image information: VIS instrument. Latitude -14.7, Longitude 175.5 East (184.5 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04561" onclick="window.open(this.href); return false;" title="Voir l'image PIA04561: Destination: Gusev sur le site de la NASA">Voir l'image PIA04561: Destination: Gusev sur le site de la NASA.</a></div>
PIA04561: Destination: Gusev
<h1>PIA04576: Lava-Filled Craters</h1><div class="PIA04576" lang="en" style="width:535px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04576_context.jpg"></a><br><p>Released 12 June 2003<p>Craters and hills form high standing streamlined plateaus or islands in a channeled area. The plateaus are rounded in the upstream direction and taper to a point in the downstream direction, indicating that the direction of flow in this area was roughly south to north, or bottom to top. The channels appear to be filled with lava flow deposits that are raised above the channel in some areas. A lava flow diverges around a small streamlined hill near the bottom of the image and then merges again around the northern end of it. Near the top of the image is a crater with a breach on the east (right) side that allowed the lava to flow in, leaving a lobate, high standing deposit. The channels may have been formed by the lava flows that currently fill them or there may have been flow of liquid water that created them before the lava was emplaced.<p>Image information: VIS instrument. Latitude 16, Longitude 183 East (177 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04576" onclick="window.open(this.href); return false;" title="Voir l'image PIA04576: Lava-Filled Craters sur le site de la NASA">Voir l'image PIA04576: Lava-Filled Craters sur le site de la NASA.</a></div>
PIA04576: Lava-Filled Craters
<h1>PIA04577: Canyon Walls</h1><div class="PIA04577" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04577_context.jpg"></p> <a href="/figures/PIA04577_projection.jpg"></a><b> 3D Projection onto MOLA data</b></p><p>Released 13 June 2003</br>The high canyon walls of Valles Marineris make for a striking 3-D THEMIS image. Geologic materials that are more resistant to erosion produce cliff forming units while landslides and streaks are observed on slope units. Several dust avalanches are observed in the top of the image.</p><p>Image information: VIS instrument. Latitude -4.6, Longitude 268.4 East (91.6 West). 19 meter/pixel resolution.</p>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.</p><p>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.</p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04577" onclick="window.open(this.href); return false;" title="Voir l'image PIA04577: Canyon Walls sur le site de la NASA">Voir l'image PIA04577: Canyon Walls sur le site de la NASA.</a></div>
PIA04577: Canyon Walls
<h1>PIA04578: Volcanic Surface Textures</h1><div class="PIA04578" lang="en" style="width:532px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04578_context.jpg"></a><br><p>Released 16 June 2003<p>The platy surface texture observed in this THEMIS image of the vast plains southeast of the volcano Elysium Mons likely formed by very fluid cooling lava. Variations in the surface texture may reflect different cooling or flow rates of the lava. The lack of any large impact craters also points to a relatively young age for these volcanic materials. The two largest impact craters occur in the higher plateau unit indicating that these materials are older.<p>Image information: VIS instrument. Latitude 11.6, Longitude 182.4 East (177.6 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04578" onclick="window.open(this.href); return false;" title="Voir l'image PIA04578: Volcanic Surface Textures sur le site de la NASA">Voir l'image PIA04578: Volcanic Surface Textures sur le site de la NASA.</a></div>
PIA04578: Volcanic Surface Textures
<h1>PIA04579: Etched Terrain</h1><div class="PIA04579" lang="en" style="width:423px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04579_context.jpg"></a><br><p>Released 17 June 2003<p>This stunning THEMIS visible image was acquired in "etched terrain" near the south pole of Mars. In several places in this image there are large areas with many dark spots. These spots have been noticed to appear and disappear as the seasons progress on Mars. As the southern hemisphere of Mars gets warmer, carbon dioxide frost present in this terrain sublimates, leaving behind the dark spots.<p>Image information: VIS instrument. Latitude -73.5, Longitude 351.3 East (8.7 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04579" onclick="window.open(this.href); return false;" title="Voir l'image PIA04579: Etched Terrain sur le site de la NASA">Voir l'image PIA04579: Etched Terrain sur le site de la NASA.</a></div>
PIA04579: Etched Terrain
<h1>PIA04580: Wind, Water, and Lava</h1><div class="PIA04580" lang="en" style="width:487px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04580_context.jpg"></a><br><p>Released 18 June 2003<p>The three main geological agents acting on the Martian surface are visible in this image, within an outflow channel to the east of the Tharsis volcanos and north of Valles Marineris. In a wide channel previously eroded by water, linear features have been eroded into the rock by the wind. Later, lava flows embayed the streamlined rocks. A second, younger flow lobe is visible at the bottom of the image.<p>Image information: VIS instrument. Latitude 17, Longitude 283.6 East (76.4 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04580" onclick="window.open(this.href); return false;" title="Voir l'image PIA04580: Wind, Water, and Lava sur le site de la NASA">Voir l'image PIA04580: Wind, Water, and Lava sur le site de la NASA.</a></div>
PIA04580: Wind, Water, and Lava
<h1>PIA04585: Smooth and Scrambled</h1><div class="PIA04585" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04585_context.jpg"></a><br><p>Released 19 June 2003<p>A flat-floored crater in central Arabia hosts an interior crater with interesting ejecta. The scrambled patterns in the ejecta suggest fluidized flow during emplacement. This contrasts with the much smoother terrain on the left side of the image. Although there is some ambiguity, it appears that the smooth material has lapped up onto the ejecta, which raises the question of where the source is for this more recent flow of material.<p>Image information: VIS instrument. Latitude 2.8, Longitude 37 East (323 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04585" onclick="window.open(this.href); return false;" title="Voir l'image PIA04585: Smooth and Scrambled sur le site de la NASA">Voir l'image PIA04585: Smooth and Scrambled sur le site de la NASA.</a></div>
PIA04585: Smooth and Scrambled
<h1>PIA04586: Channels and Erosion</h1><div class="PIA04586" lang="en" style="width:486px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04586_context.jpg"></a><br><p>Released 20 June 2003<p>The dissected and eroded channel observed in this THEMIS image taken of plains materials southwest of the volcano Elysium Mons shows typical erosional islands and depositional features. The interesting thing about this channel is that it appears to start out of nowhere. The MOLA context image shows that the channel originates from a fissure within the ground, whose origin is likely volcanic, but may also be related to volatile processes.<p>Image information: VIS instrument. Latitude 19.5, Longitude 126.8 East (233.2 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04586" onclick="window.open(this.href); return false;" title="Voir l'image PIA04586: Channels and Erosion sur le site de la NASA">Voir l'image PIA04586: Channels and Erosion sur le site de la NASA.</a></div>
PIA04586: Channels and Erosion
<h1>PIA04597: Syrtis in Retreat</h1><div class="PIA04597" lang="en" style="width:534px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04597_context.jpg"></a><br><p>Released 30 June 2003<p>Lava flows from the broad shield volcano Syrtis Major have poured into the Isidis Basin to the east. The transition between these great provinces is marked by broken slabs of accumulated volcanic material that is retreating from its position on the floor of the basin. A jagged scarp a half a kilometer high is the result.<p>Image information: VIS instrument. Latitude 13.7, Longitude 79.4 East (280.6 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04597" onclick="window.open(this.href); return false;" title="Voir l'image PIA04597: Syrtis in Retreat sur le site de la NASA">Voir l'image PIA04597: Syrtis in Retreat sur le site de la NASA.</a></div>
PIA04597: Syrtis in Retreat
<h1>PIA04607: Dalmatian Terrain</h1><div class="PIA04607" lang="en" style="width:429px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04607_context.jpg"></a><br><p>Released 1 July 2003<p>An example of dalmatian terrain near the south pole. The bright material is polar ice and the dark spots dark sands that are appearing in depressions where the ice has defrosted to reveal underlying material. Interestingly, there is an almost continuous dark band around the edges of many of the depressions. This could be a clue to the nature of the sand deposits in polar regions. The sand forms dunes in a range of sizes and shapes. Near the top of the image the dunes shrink until they are smaller than the 18 m pixels of the THEMIS camera and seem to disappear into the surrounding ice.<p>Image information: VIS instrument. Latitude -66.6, Longitude 36 East (324 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04607" onclick="window.open(this.href); return false;" title="Voir l'image PIA04607: Dalmatian Terrain sur le site de la NASA">Voir l'image PIA04607: Dalmatian Terrain sur le site de la NASA.</a></div>
PIA04607: Dalmatian Terrain
<h1>PIA04608: Bumps and Humps</h1><div class="PIA04608" lang="en" style="width:532px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04608_context.jpg"></a><br><p>Released 2 July 2003<p>These small hills/mounds in Isidis Planitia may be of volcanic origin or alternatively eroded impact craters called pedestal craters. The volcanic origin seems more likely because there appears to be structural control to these features (linear pattern). These mounds may have formed over linear dikes in the region.<p>Image information: VIS instrument. Latitude 11.6, Longitude 84.8 East (275.2 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04608" onclick="window.open(this.href); return false;" title="Voir l'image PIA04608: Bumps and Humps sur le site de la NASA">Voir l'image PIA04608: Bumps and Humps sur le site de la NASA.</a></div>
PIA04608: Bumps and Humps
<h1>PIA04611: Dunes</h1><div class="PIA04611" lang="en" style="width:429px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04611_context.jpg"></a><br><p>Released 3 July 2003<p>Defrosting dunes of the southern hemisphere in southern summer.<p>Image information: VIS instrument. Latitude -66.5, Longitude 195.2 East (164.8 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04611" onclick="window.open(this.href); return false;" title="Voir l'image PIA04611: Dunes sur le site de la NASA">Voir l'image PIA04611: Dunes sur le site de la NASA.</a></div>
PIA04611: Dunes
<h1>PIA04617: Platy Flows</h1><div class="PIA04617" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04617_context.jpg"></a><br><p>Released 7 July 2003<p>Platy flows covering the plains of Southern Elysium. These flows appear to be very fluid lava flows but a mudflow origin can't be completely ruled out for these flows.<p>Image information: VIS instrument. Latitude -2.9, Longitude 163.6 East (196.4 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04617" onclick="window.open(this.href); return false;" title="Voir l'image PIA04617: Platy Flows sur le site de la NASA">Voir l'image PIA04617: Platy Flows sur le site de la NASA.</a></div>
PIA04617: Platy Flows
<h1>PIA04618: Destination: Meridiani</h1><div class="PIA04618" lang="en" style="width:521px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04618_context.jpg"></a><br><p>Released 8 July 2003<p>Yesterday a modified Delta II rocket successfully lifted off from Cape Canaveral, Florida, sending the Mars Exploration Rover named Opportunity on its way to Mars. This THEMIS image covers part of the landing ellipse in Meridiani Planum, where the rover is expected to land in about seven months. The Meridiani Planum landing site was selected because of the detection by the Thermal Emission Spectrometer (TES) instrument on Mars Global Surveyor of a mineral called hematite, which usually forms in the presence of water. While this visible wavelength image cannot "see" hematite, what it does show is a relatively smooth (safe) area, which, in places, contains a brighter material. Because Opportunity will be able to travel dozens of meters per day, it will be able to sample both bright material and the darker material that takes up the majority of this scene. Understanding what each of these materials are and their relationship to each other will help scientists to get a better understanding of the history of water on this part of Mars.<p>Image information: VIS instrument. Latitude -1.8, Longitude 354.7 East (5.3 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04618" onclick="window.open(this.href); return false;" title="Voir l'image PIA04618: Destination: Meridiani sur le site de la NASA">Voir l'image PIA04618: Destination: Meridiani sur le site de la NASA.</a></div>
PIA04618: Destination: Meridiani
<h1>PIA04642: Gigas Meets Ulysses</h1><div class="PIA04642" lang="en" style="width:489px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04642_context.jpg"></a><br><p>Released 9 July 2003<p>Roughly halfway between the great volcanoes of Olympus Mons and Pavonis Mons, the graben (troughs) of Ulysses Fossae intersect with the furrows of Gigas (gigantic) Sulci. A clear time sequence is evident: first came the formation of the sulci terrain (to the left), which then was fractured by graben radial to Olympus Mons, followed by flooding of lava. All but the deepest graben are filled by lava in the topographic low between the two volcanic rises.<p>Image information: VIS instrument. Latitude 11.8, Longitude 234.3 East (125.7 West). 19 meter/pixel resolution.<p>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.<p>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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04642" onclick="window.open(this.href); return false;" title="Voir l'image PIA04642: Gigas Meets Ulysses sur le site de la NASA">Voir l'image PIA04642: Gigas Meets Ulysses sur le site de la NASA.</a></div>
PIA04642: Gigas Meets Ulysses

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