Mission Mars Odyssey - 2

<h1>PIA04643: Crater Interior</h1><div class="PIA04643" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04643_context.jpg"></a><br><p>Released 10 July 2003<p>The large peak observed in this THEMIS image is the central uplift of an impact crater that formed by inward and upward movement of material below the crater floor during the crater-forming event and is not due to long-term slow adjustment of crater materials. Evidence of modification to the post-impact surface is observed throughout the image as materials are being eroded and stripped from the crater floor.<p>Image information: VIS instrument. Latitude -3.1, Longitude 115.9 East (244.1 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/PIA04643" onclick="window.open(this.href); return false;" title="Voir l'image PIA04643: Crater Interior sur le site de la NASA">Voir l'image PIA04643: Crater Interior sur le site de la NASA.</a></div>
PIA04643: Crater Interior
<h1>PIA04644: Lava Flows</h1><div class="PIA04644" lang="en" style="width:479px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04644_context.jpg"></a><br><p>Released 11 July 2003<p>Lava has flooded this crater in Daedalia Planum.<p>Image information: VIS instrument. Latitude -21.5, Longitude 229.7 East (130.3 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/PIA04644" onclick="window.open(this.href); return false;" title="Voir l'image PIA04644: Lava Flows sur le site de la NASA">Voir l'image PIA04644: Lava Flows sur le site de la NASA.</a></div>
PIA04644: Lava Flows
<h1>PIA04645: Fractures and Collapse</h1><div class="PIA04645" lang="en" style="width:515px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04645_context.jpg"></a><br><p>Released 14 July 2003<p>This graben (fracture) in Memnonia Fossae is noteworthy because one can still see large blocks on the floor. These blocks most likely dropped down from above when the fracture opened up.<p>Image information: VIS instrument. Latitude -18.2, Longitude 211.4 East (148.6 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/PIA04645" onclick="window.open(this.href); return false;" title="Voir l'image PIA04645: Fractures and Collapse sur le site de la NASA">Voir l'image PIA04645: Fractures and Collapse sur le site de la NASA.</a></div>
PIA04645: Fractures and Collapse
<h1>PIA04646: Huygens Crater</h1><div class="PIA04646" lang="en" style="width:482px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04646_context.jpg"></a><br><p>Released 15 July 2003<p>The floor of the 450 km diameter crater named after Dutch astronomer Christian Huygens (1629-1695) shows an unusual texture. Smooth-topped mesas are scattered across a more rugged surface. The mesas are testament to a former smooth layer of material that is in the process of eroding away.<p>Image information: VIS instrument. Latitude -16.2, Longitude 54.5 East (305.5 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/PIA04646" onclick="window.open(this.href); return false;" title="Voir l'image PIA04646: Huygens Crater sur le site de la NASA">Voir l'image PIA04646: Huygens Crater sur le site de la NASA.</a></div>
PIA04646: Huygens Crater
<h1>PIA04647: Processes of Geology</h1><div class="PIA04647" lang="en" style="width:469px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04647_context.jpg"></a><br><p>Released 16 July 2003<p>This THEMIS visible image captures a complex process of deposition, burial and exhumation. The crater ejecta in the top of the image is in the form of flow lobes, indicating that the crater was formed in volatile-rich terrain. While a radial pattern can be seen in the ejecta, the pattern is sharper in the lower half of the ejecta. This is because the top half of the ejecta is still buried by a thin layer of sediment. It is most likely that at one time the entire area was covered. Wind, and perhaps water erosion have started to remove this layer, once again exposing the what was present underneath.<p>Image information: VIS instrument. Latitude -34.3, Longitude 181.2 East (178.8 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/PIA04647" onclick="window.open(this.href); return false;" title="Voir l'image PIA04647: Processes of Geology sur le site de la NASA">Voir l'image PIA04647: Processes of Geology sur le site de la NASA.</a></div>
PIA04647: Processes of Geology
<h1>PIA04648: South Polar Layered Deposits</h1><div class="PIA04648" lang="en" style="width:752px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04648_context.jpg"></a><br><p>Released 17 July 2003<p>Similar to ice cores taken from Greenland and Antarctica, Mars also has fine-scale layered deposits in both the north and south polar regions. In this image from the south pole, alternating light and dark bands represent varying amounts of dust or sand mixed in with carbon dioxide ice. These layers are related in part to climate cycles caused by variations in the tilt of Mars' rotational axis, as well as other orbital variations that occur on geologic time scales (tens of thousands of years).<p>Image information: VIS instrument. Latitude -80.1, Longitude 260.4 East (99.6 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/PIA04648" onclick="window.open(this.href); return false;" title="Voir l'image PIA04648: South Polar Layered Deposits sur le site de la NASA">Voir l'image PIA04648: South Polar Layered Deposits sur le site de la NASA.</a></div>
PIA04648: South Polar Layered Deposits
<h1>PIA04649: Tader Valles</h1><div class="PIA04649" lang="en" style="width:450px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04649_context.jpg"></a><br><p>Released 18 July 2003<p>Tader Valles, an ancient name for the present Segura River in Spain, is a set of small channels at mid-southern latitudes that is filled by smooth material with rounded margins. It is possible that this material is snow covered by a mantle of dust or dirt.<p>Image information: VIS instrument. Latitude -49.4, Longitude 208.6 East (151.4 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/PIA04649" onclick="window.open(this.href); return false;" title="Voir l'image PIA04649: Tader Valles sur le site de la NASA">Voir l'image PIA04649: Tader Valles sur le site de la NASA.</a></div>
PIA04649: Tader Valles
<h1>PIA04651: Eroded Mesas</h1><div class="PIA04651" lang="en" style="width:530px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04651_context.jpg"></a><br><p />Released 21 July 2003<p />Located not far south of Olympus Mons, these mesas show interesting erosional patterns. Some of their slopes, particularly those on the eastern-facing sides, show a debris with a blocky and somewhat etched appearance. In the bottom half of the image, where the mesas become more common, small bright bedforms snake between the mesas. Perhaps they are formed from locally-derived materials eroding off the mesa slopes. <p />Image information: VIS instrument. Latitude 9.3, Longitude 227.1 East (132.9 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04651" onclick="window.open(this.href); return false;" title="Voir l'image PIA04651: Eroded Mesas sur le site de la NASA">Voir l'image PIA04651: Eroded Mesas sur le site de la NASA.</a></div>
PIA04651: Eroded Mesas
<h1>PIA04659: Wind Effects in Tharsis</h1><div class="PIA04659" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04659_context.jpg"></a><br /><p />Released 24 July 2003<p />Located on the western slope of the Tharsis volcanic bulge, this landscape shows the effect of the large-scale wind regime of the region. The northwest/southeast trending yardangs may have been eroded by winds from both directions, but there are some indicators, primarily on the lower left mesa, that the streamlined forms resulted from downslope (to the northwest) winds.<p />Image information: VIS instrument. Latitude -5, Longitude 200.3 East (159.7 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04659" onclick="window.open(this.href); return false;" title="Voir l'image PIA04659: Wind Effects in Tharsis sur le site de la NASA">Voir l'image PIA04659: Wind Effects in Tharsis sur le site de la NASA.</a></div>
PIA04659: Wind Effects in Tharsis
<h1>PIA04661: Gusev Crater</h1><div class="PIA04661" lang="en" style="width:483px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04661_context.jpg"></a><br /><p />Released 25 July 2003<p />Wrinkle ridges deform the plains in the bottom of Gusev crater, destination of the MER "Spirit" rover. The plains were likely created from a flood basalt with ridges forming where there were compressional forces. Dark wind streaks come together to form a dark spot at the bottom of the image where the wind has removed a thin layer of bright dust off a dark surface. On the left side of the image a portion of a lobe of material is visible, which may have resulted from a mud or debris flow. This feature was recently identified by the THEMIS team and may represent the most recent deposit in the crater involving water.<p />Image information: VIS instrument. Latitude -13.9, Longitude 175.4 East (184.6 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04661" onclick="window.open(this.href); return false;" title="Voir l'image PIA04661: Gusev Crater sur le site de la NASA">Voir l'image PIA04661: Gusev Crater sur le site de la NASA.</a></div>
PIA04661: Gusev Crater
<h1>PIA04666: Remnants of MFF</h1><div class="PIA04666" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04666_context.jpg"></a><br /><p />Through the haze of a dissipating dust storm in the southern hemisphere, the strange landscape of the eroding Medusa Fossae Formation is still evident. In the southern portion of this image, small mounds of sedimentary material are all that remains of a once more continuous layer. This former layer was deposited on a pre-existing landscape that was itself already heavily eroded and disrupted.<p />Image information: VIS instrument. Latitude -4, Longitude 155 East (205 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04666" onclick="window.open(this.href); return false;" title="Voir l'image PIA04666: Remnants of MFF sur le site de la NASA">Voir l'image PIA04666: Remnants of MFF sur le site de la NASA.</a></div>
PIA04666: Remnants of MFF
<h1>PIA04667: Valley Networks</h1><div class="PIA04667" lang="en" style="width:463px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04667_context.jpg"></a><br /><p />Released 30 July 2003<p />Valley networks are a relatively common feature in the southern highlands of Mars. This THEMIS visible image contains several of these small channels. Some appear clustered near the smaller crater at the top of the image. There is still some debate over the origin of these enigmatic martian landforms. Were they caused by overland flow after precipitation, underground sapping, or a combination of both?<p />Image information: VIS instrument. Latitude -40.6, Longitude 165.2 East (194.8 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04667" onclick="window.open(this.href); return false;" title="Voir l'image PIA04667: Valley Networks sur le site de la NASA">Voir l'image PIA04667: Valley Networks sur le site de la NASA.</a></div>
PIA04667: Valley Networks
<h1>PIA04671: Lava Flows</h1><div class="PIA04671" lang="en" style="width:514px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04671_context.jpg"></a><br /><p />Released 31 July 2003<p />Remarkable differences in brightness and texture are apparent between these lava flows found on the southern flanks of Arsia Mons. These differences could be due to variations in composition, age, vessicularity, or degrees of weathering<p />Image information: VIS instrument. Latitude -19.5, Longitude 238.4 East (121.6 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04671" onclick="window.open(this.href); return false;" title="Voir l'image PIA04671: Lava Flows sur le site de la NASA">Voir l'image PIA04671: Lava Flows sur le site de la NASA.</a></div>
PIA04671: Lava Flows
<h1>PIA04673: Crenulated Lava Flows of Daedalia Planum</h1><div class="PIA04673" lang="en" style="width:466px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04673_context.jpg"></a><br /><p />Released 1 August 2003<p />Younger crenulated lava flows of Daedalia Planum lap up against the ancient highlands. The crenulated ridges are most likely pressure ridges. Several small channels can be seen in the highlands.<p />Image information: VIS instrument. Latitude -37.1, Longitude 221.8 East (138.2 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04673" onclick="window.open(this.href); return false;" title="Voir l'image PIA04673: Crenulated Lava Flows of Daedalia Planum sur le site de la NASA">Voir l'image PIA04673: Crenulated Lava Flows of Daedalia Planum sur le site de la NASA.</a></div>
PIA04673: Crenulated Lava Flows of Daedalia Planum
<h1>PIA04701: Knobby Terrain Down Under</h1><div class="PIA04701" lang="en" style="width:510px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04701_context.jpg"></a><br /><p />Released 4 August 2003<p />At first glance, this THEMIS visible image appears to show chaotic terrain similar to several other areas which have been shown on this web page in recent weeks. However, this knobby terrain is in the southern highlands and nearly 100 degrees of longitude away from the equatorial chaotic terrain related to the giant outflow channels in the northern hemisphere. In addition, this knobby terrain does not seem to be inside of any kind of basin, like much of the chaotic terrain. What we may be seeing here are remnants of a rock layer that once existed but has been eroding away. It is important to note that this layer appears to have a higher albedo (visible brightness) than the surrounding terrain. This may indicate a difference in composition or grain size between the knobs and the surrounding terrain.<p />Image information: VIS instrument. Latitude -37.3, Longitude 164.1 East (195.9 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04701" onclick="window.open(this.href); return false;" title="Voir l'image PIA04701: Knobby Terrain Down Under sur le site de la NASA">Voir l'image PIA04701: Knobby Terrain Down Under sur le site de la NASA.</a></div>
PIA04701: Knobby Terrain Down Under
<h1>PIA04702: Wind-sculpted Rocks</h1><div class="PIA04702" lang="en" style="width:486px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04702_context.jpg"></a><br /><p />Released 5 August 2003<p />Because it does not rain on Mars, the wind is free to shape the surface to the extent that it becomes clear even in spacecraft images. This image shows parallel grooves oriented north to south, slowly eroded by winds of the same alignment. At the bottom of the image, a round mesa is most likely an inverted crater--that is, a crater that has withstood the wind erosion to such a degree that it remains on the surrounding plains as a protruding structure, rather than a hole in the ground.<p />Image information: VIS instrument. Latitude -12, Longitude 177.3 East (182.7 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04702" onclick="window.open(this.href); return false;" title="Voir l'image PIA04702: Wind-sculpted Rocks sur le site de la NASA">Voir l'image PIA04702: Wind-sculpted Rocks sur le site de la NASA.</a></div>
PIA04702: Wind-sculpted Rocks
<h1>PIA04703: Dunes in a Crater Floor</h1><div class="PIA04703" lang="en" style="width:468px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04703_context.jpg"></a><br /><p />Released 6 August 2003<p />This image shows the floor of a crater just north of the Argyre basin in the southern hemisphere. Dark dunes have been pushed up against the northeastern interior rim of the crater, indicating that the prevailing winds blow from the southwest.<p />Image information: VIS instrument. Latitude -35.7, Longitude 324.1 East (35.9 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04703" onclick="window.open(this.href); return false;" title="Voir l'image PIA04703: Dunes in a Crater Floor sur le site de la NASA">Voir l'image PIA04703: Dunes in a Crater Floor sur le site de la NASA.</a></div>
PIA04703: Dunes in a Crater Floor
<h1>PIA04704: Craters and Grabens: Circles and Lines</h1><div class="PIA04704" lang="en" style="width:463px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04704_context.jpg"></a><br /><p />Released 7 August 2003<p />Large grooves indicating tectonic faulting cross this image from the upper right to the lower left. This image is located not too far south of the Tharsis Montes, which probably produced the faulting seen here as they erupted and uplifted the terrain. Many craters are apparent on the surface here, some of which have impacted on the grabens (grooves), indicating that they are younger than the faults. The crater in the center of the image appears to have been breached, allowing material (perhaps a mudslide) to spill to the west. Could this flow be caused by an earthquake that occurred when the faults moved, or did it happen much later?<p />Image information: VIS instrument. Latitude -35.7, Longitude 324.1 East (35.9 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04704" onclick="window.open(this.href); return false;" title="Voir l'image PIA04704: Craters and Grabens: Circles and Lines sur le site de la NASA">Voir l'image PIA04704: Craters and Grabens: Circles and Lines sur le site de la NASA.</a></div>
PIA04704: Craters and Grabens: Circles and Lines
<h1>PIA04705: Outflow Channel</h1><div class="PIA04705" lang="en" style="width:483px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04705_context.jpg"></a><br /><p />Released 8 August 2003<p />A large outflow channel was split and diverted around an obstacle just north of Memnonia Fossae. Images released on <a href="/catalog/PIA04077">11/06/02</a>) and <a href="/catalog/PIA04545">05/28/03</a>) may be a continuation of this channel and offer additional insight to the ancient flow of water and geologic history of this region.<p />Image information: VIS instrument. Latitude -13.6, Longitude 210.4 East (149.6 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04705" onclick="window.open(this.href); return false;" title="Voir l'image PIA04705: Outflow Channel sur le site de la NASA">Voir l'image PIA04705: Outflow Channel sur le site de la NASA.</a></div>
PIA04705: Outflow Channel
<h1>PIA04706: Charlier Crater Dunes</h1><div class="PIA04706" lang="en" style="width:564px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04706_context.jpg"></a><br /><p />Released 11 August 2003<p />A crater named after a Swedish astronomer hosts a dune field that is brightened by a layer of frost. Although the crater is located at high southern latitudes, it is probably too late in the spring season for the dunes to retain the CO2 frost that forms during the southern winter; water ice is a better candidate for the dune frost.<p />Image information: VIS instrument. Latitude -68.1, Longitude 190.4 East (169.6 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04706" onclick="window.open(this.href); return false;" title="Voir l'image PIA04706: Charlier Crater Dunes sur le site de la NASA">Voir l'image PIA04706: Charlier Crater Dunes sur le site de la NASA.</a></div>
PIA04706: Charlier Crater Dunes
<h1>PIA04707: Peneus Patera</h1><div class="PIA04707" lang="en" style="width:442px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04707_context.jpg"></a><br /><p />Released 12 August 2003<p />An unusual layer of smooth material covers the flanks of the volcano Peneus Patera just south of the Hellas Basin. Though smooth on its upper surface, the layer is pitted by a process of erosion that produces steep scarps facing the south pole and more gentle slopes in the direction of the equator. The style of erosion of the smooth layer suggests that ice of some form plays a role in shaping this terrain.<p />Image information: VIS instrument. Latitude -57, Longitude 54.1 East (305.9 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04707" onclick="window.open(this.href); return false;" title="Voir l'image PIA04707: Peneus Patera sur le site de la NASA">Voir l'image PIA04707: Peneus Patera sur le site de la NASA.</a></div>
PIA04707: Peneus Patera
<h1>PIA04708: Three Terrains</h1><div class="PIA04708" lang="en" style="width:519px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04708_context.jpg"></a><br /><p />Released 13 August 2003<p />The great highland/lowland boundary that divides the whole of Mars cuts diagonally through this image. The smoother lowland terrain to the north appears to lap up against the highland terrain. An eroded layered terrain also is evident in the lower third of the image. This may be a remnant of the Medussae Fossae Formation, a lobe of which occurs just to the west of this scene.<p />Image information: VIS instrument. Latitude -10.8, Longitude 187.2 East (172.8 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04708" onclick="window.open(this.href); return false;" title="Voir l'image PIA04708: Three Terrains sur le site de la NASA">Voir l'image PIA04708: Three Terrains sur le site de la NASA.</a></div>
PIA04708: Three Terrains
<h1>PIA04709: Koga Crater</h1><div class="PIA04709" lang="en" style="width:513px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04709_context.jpg"></a><br /><p />Released 18 August 2003<p />This image shows Koga crater, named for a town in Tanzania. It is located in a region called Claritas Fossae, full of large linear features that are not visible in this particular image. What is visible is a mantle of fine material that is draped over much of the terrain, particularly in the floor of the crater. Note how the low-lying surfaces are smooth and dark, covered in this layer of fine material. Sharp blocks and cliffs poke through this mantle, showing that either the mantle never buried all of the underlying topography, or that some of it has eroded away to expose the higher ground.<p />Image information: VIS instrument. Latitude -29.1, Longitude 256.1 East (103.9 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04709" onclick="window.open(this.href); return false;" title="Voir l'image PIA04709: Koga Crater sur le site de la NASA">Voir l'image PIA04709: Koga Crater sur le site de la NASA.</a></div>
PIA04709: Koga Crater
<h1>PIA04710: Eroded Surfaces</h1><div class="PIA04710" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04710_context.jpg"></a><br /><p />Released 19 August 2003<p />The knobby terrain and eroded impact crater observed in this THEMIS image of the Eumenides Dorsum region are evidence to a surface that has been heavily modified and stripped over time. Variable layering of material within the impact crater suggest a succession of events which eroded the surface and exposed possibly different units. Slope streaks and dust avalanches are also observed within the impact crater and point to recent and continued modification of the surface.<p />Image information: VIS instrument. Latitude 4.9, Longitude 203.6 East (156.4 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04710" onclick="window.open(this.href); return false;" title="Voir l'image PIA04710: Eroded Surfaces sur le site de la NASA">Voir l'image PIA04710: Eroded Surfaces sur le site de la NASA.</a></div>
PIA04710: Eroded Surfaces
<h1>PIA04711: Valles Marineris Landforms</h1><div class="PIA04711" lang="en" style="width:521px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04711_context.jpg"></a><br /><p />Released 20 August 2003<p />The steep canyon walls and ridge forming layers of Valles Marineris are on display in this THEMIS picture. Landslides and gullies observed throughout the image are evidence to the continued mass wasting of the martian surface. Upon close examination of the canyon floor, small ripples that are likely migrating sand dunes are seen on the surface. Some slopes also display an interesting raked-like appearance that may be due to a combination of aeolian and gully forming processes.<p />Image information: VIS instrument. Latitude -7.4, Longitude 274.2 East (85.8 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04711" onclick="window.open(this.href); return false;" title="Voir l'image PIA04711: Valles Marineris Landforms sur le site de la NASA">Voir l'image PIA04711: Valles Marineris Landforms sur le site de la NASA.</a></div>
PIA04711: Valles Marineris Landforms
<h1>PIA04712: A Suite of Features</h1><div class="PIA04712" lang="en" style="width:524px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04712_context.jpg"></a><br /><p />Released 21 August 2003<p />The southern flank of the massive Pavonis Mons volcano hosts a remarkable concentration of channels, pit chains, and graben. The deep channels likely began as subsurface lava tubes whose roofs collapsed as pits developed over them. Examples of this process are clearly evident throughout the scene. Also present are relatively straight troughs (graben) that crosscut the channels and pit chains. These arise from the tectonic forces associated with construction of the massive volcano. Lava channels and flow textures are evident on the uppermost surfaces.<p />Image information: VIS instrument. Latitude -0.9, Longitude 246.2 East (113.8 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04712" onclick="window.open(this.href); return false;" title="Voir l'image PIA04712: A Suite of Features sur le site de la NASA">Voir l'image PIA04712: A Suite of Features sur le site de la NASA.</a></div>
PIA04712: A Suite of Features
<h1>PIA04713: Cross-Cutting Relationships</h1><div class="PIA04713" lang="en" style="width:533px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04713_context.jpg"></a><br /><p />Released 25 August 2003<p />The several linear cross-cutting grabens and collapse features observed in this THEMIS image illustrate the relative timing of a series of complex geologic processes as more recent events produce features that overlap and intersect older ones. Some impact craters are observed to be cut grabens, suggesting an older impact event compared to impact craters that appear fresh and unmodified.<p />Image information: VIS instrument. Latitude 14.1, Longitude 236.3 East (123.7 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04713" onclick="window.open(this.href); return false;" title="Voir l'image PIA04713: Cross-Cutting Relationships sur le site de la NASA">Voir l'image PIA04713: Cross-Cutting Relationships sur le site de la NASA.</a></div>
PIA04713: Cross-Cutting Relationships
<h1>PIA04714: Sirenum Fossae</h1><div class="PIA04714" lang="en" style="width:509px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04714_context.jpg"></a><br /><p />Released 26 August 2003<p />Sirenum Fossae: this image of a graben is curious and interesting because of the braided appearance of its floor. The braided pattern suggests that water has flowed through this fracture in the past.<p />Image information: VIS instrument. Latitude -36.9, Longitude 193 East (167 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04714" onclick="window.open(this.href); return false;" title="Voir l'image PIA04714: Sirenum Fossae sur le site de la NASA">Voir l'image PIA04714: Sirenum Fossae sur le site de la NASA.</a></div>
PIA04714: Sirenum Fossae
<h1>PIA04715: Alpine Glaciers</h1><div class="PIA04715" lang="en" style="width:521px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04715_context.jpg"></a><br /><p />Released 27 August 2003<p />This image shows part of the western flank of Arsia Mons, the southernmost of the three great Tharsis Montes. The surface shows parallel ridges more reminiscent of a Zen garden than any typical geological feature. These ridges are not typical of lava flow fronts, so a different explanation has been proposed by Mars scientists. These ridges may instead be ancient signs of previously existing glaciers that formed high on the volcano's flank. As glaciers retreat with the seasons and shifting climate, they leave behind a mound of debris along their receding edge. Successive retreats can produce a series of parallel ridges similar to those seen here.<p />Image information: VIS instrument. Latitude -6.9, Longitude 230.5 East (129.5 West). 19 meter/pixel resolution.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04715" onclick="window.open(this.href); return false;" title="Voir l'image PIA04715: Alpine Glaciers sur le site de la NASA">Voir l'image PIA04715: Alpine Glaciers sur le site de la NASA.</a></div>
PIA04715: Alpine Glaciers
<h1>PIA04716: Upside Down Craters</h1><div class="PIA04716" lang="en" style="width:474px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p /><a href="/figures/PIA04716_context.jpg"></a><br /><p />Released 28 August 2003<p />This image shows an area not too far south of Meridiani, the area where the mineral hematite was found on the Martian surface. In the center of the image the terrain becomes quite rugged, where a great amount of material has eroded away, leaving behind buttes and mesas. Note how some of the mesas are quite circular. This is an example of "inverted terrain," in which a topographically low feature, like a crater or a trench, becomes filled in with material. Later, the surrounding terrain erodes away while the feature protects the material filling it. These circular mesas are most likely inverted craters that were once holes in the ground.<p />Image information: VIS instrument. Latitude -28.2, Longitude 8.7 East (351.3 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.<br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04716" onclick="window.open(this.href); return false;" title="Voir l'image PIA04716: Upside Down Craters sur le site de la NASA">Voir l'image PIA04716: Upside Down Craters sur le site de la NASA.</a></div>
PIA04716: Upside Down Craters

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