Mission Mars Odyssey - 2

<h1>PIA03995: THEMIS Images as Art #56</h1><div class="PIA03995" lang="en" style="width:289px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p>Welcome to another brief interval of THEMIS Images as Art. For two weeks, we will be showcasing images for their aesthetic value rather than their science content. Portions of these images resemble things in our everyday lives, from animals to letters of the alphabet. We hope you enjoy our fanciful look at Mars!</p><p>Mars has a kiss for you today!</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><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/PIA03995" onclick="window.open(this.href); return false;" title="Voir l'image PIA03995: THEMIS Images as Art #56 sur le site de la NASA">Voir l'image PIA03995: THEMIS Images as Art #56 sur le site de la NASA.</a></div>
PIA03995: THEMIS Images as Art #56
<h1>PIA04000: Hydaspis Chaos</h1><div class="PIA04000" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04000_context.jpg"></a><br><p>Collapsed terrain in Hydapsis Chaos.<p>This is the source terrain for several outflow channels. 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>VIS Instrument. Latitude 3.2, Longitude 333.2 East. 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04000" onclick="window.open(this.href); return false;" title="Voir l'image PIA04000: Hydaspis Chaos sur le site de la NASA">Voir l'image PIA04000: Hydaspis Chaos sur le site de la NASA.</a></div>
PIA04000: Hydaspis Chaos
<h1>PIA04001: Elysium Fossae</h1><div class="PIA04001" lang="en" style="width:484px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04001_context.jpg"></a><br><p>The grabens (fractures) that dominate this scene are located northwest of a large shield volcano called Elysium Mons. Layered rock is evident along the lips of the graben as are ripples on the floors of these features. Some shallow grabens are also seen in this region.<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/PIA04001" onclick="window.open(this.href); return false;" title="Voir l'image PIA04001: Elysium Fossae sur le site de la NASA">Voir l'image PIA04001: Elysium Fossae sur le site de la NASA.</a></div>
PIA04001: Elysium Fossae
<h1>PIA04002: Dunes in Becquerel Crater</h1><div class="PIA04002" lang="en" style="width:484px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04002_context.jpg"></a><br><p>Dark dunes on the floor of an interior crater in Becquerel apparently supply the sand responsible for the erosion of the remarkable, layered deposit to the south.<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/PIA04002" onclick="window.open(this.href); return false;" title="Voir l'image PIA04002: Dunes in Becquerel Crater sur le site de la NASA">Voir l'image PIA04002: Dunes in Becquerel Crater sur le site de la NASA.</a></div>
PIA04002: Dunes in Becquerel Crater
<h1>PIA04003: Mariner 9 Anniversary/Landslides on Mars (Released 13 November 2002)</h1><div class="PIA04003" lang="en" style="width:487px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04003_context.jpg"></a><br><p>November 13, 1971 is a red-letter date in the history of exploration. Thirty-one years ago today the American spacecraft, Mariner 9, became the first spacecraft to orbit another planet. Imagery from three previous flyby Mariner Missions (4, 6, and 7) indicated that Mars looked similar to the Earth's Moon (craters and plains). However, Mariner 9's eleven month mission mapped the whole planet with over 7,000 images. This mission rewrote the book on Mars by discovering channels, polar layered materials, enormous shield volcanoes, sand dunes, and an enormous canyon system. This canyon system, Valles Marineris, was named in honor of its discoverer. Therefore, in honor of Mariner 9, the THEMIS Team is releasing an image of a portion of Valles Marineris called Melas Chasma. Melas Chasma comprises the central portion of the Valles Marineris canyon system complex. A series of massive landslides are visible on the canyon floor. The older (bottom-most) landslide has longitudinal ridges which formed parallel to flow direction, while the younger slides have concentric ridges. Dunes are also visible near the bottom of the image.<p>[Source: ASU THEMIS Science Team]<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/PIA04003" onclick="window.open(this.href); return false;" title="Voir l'image PIA04003: Mariner 9 Anniversary/Landslides on Mars (Released 13 November 2002) sur le site de la NASA">Voir l'image PIA04003: Mariner 9 Anniversary/Landslides on Mars (Released 13 November 2002) sur le site de la NASA.</a></div>
PIA04003: Mariner 9 Anniversary/Landslides on Mars (Released 13 November 2002)
<h1>PIA04004: Small volcanic crater near Pavonis Mons (Released 14 November 2002</h1><div class="PIA04004" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04003_context.jpg"></a><br><p>The small crater observed at the middle-right edge of this THEMIS image is very different from other similar looking impact craters located southeast of the Pavonis Mons volcano. This crater appears to be a volcanic crater at the summit of a small composite cone that shows evidence of repeated volcanic flows.<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/PIA04004" onclick="window.open(this.href); return false;" title="Voir l'image PIA04004: Small volcanic crater near Pavonis Mons (Released 14 November 2002 sur le site de la NASA">Voir l'image PIA04004: Small volcanic crater near Pavonis Mons (Released 14 November 2002 sur le site de la NASA.</a></div>
PIA04004: Small volcanic crater near Pavonis Mons (Released 14 November 2002
<h1>PIA04005: Ulysses Fossae in Tharsis</h1><div class="PIA04005" lang="en" style="width:489px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04002_context.jpg"></a><br><p>Extensional forces in the volcanic province of Tharsis have produced a fractured terrain that resembles wrinkled skin.<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/PIA04005" onclick="window.open(this.href); return false;" title="Voir l'image PIA04005: Ulysses Fossae in Tharsis sur le site de la NASA">Voir l'image PIA04005: Ulysses Fossae in Tharsis sur le site de la NASA.</a></div>
PIA04005: Ulysses Fossae in Tharsis
<h1>PIA04006: Impact Crater</h1><div class="PIA04006" lang="en" style="width:473px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04002_context.jpg"></a><br><p>The irregularly shaped rim of this bowl shaped impact crater is most likely due to erosion and the subsequent infilling of sediment.<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/PIA04006" onclick="window.open(this.href); return false;" title="Voir l'image PIA04006: Impact Crater sur le site de la NASA">Voir l'image PIA04006: Impact Crater sur le site de la NASA.</a></div>
PIA04006: Impact Crater
<h1>PIA04007: Degraded Craters in Phlegra Montes</h1><div class="PIA04007" lang="en" style="width:471px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04007_context.jpg"></a><br><p>The larger craters in this region north of Elysium Mons are buried and distorted almost beyond recognition.<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/PIA04007" onclick="window.open(this.href); return false;" title="Voir l'image PIA04007: Degraded Craters in Phlegra Montes sur le site de la NASA">Voir l'image PIA04007: Degraded Craters in Phlegra Montes sur le site de la NASA.</a></div>
PIA04007: Degraded Craters in Phlegra Montes
<h1>PIA04008: Libya Montes</h1><div class="PIA04008" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04008_context.jpg"></a><br><p>This image shows the rugged cratered highland region of Libya Montes. Libya Montes forms part of the rim of an ancient impact basin called Isidis. This region of the highlands is fairly dissected with valley networks. There is still debate within the scientific community as to how valley networks themselves form: surface runoff (rainfall/snowmelt) or headward erosion via groundwater sapping. The degree of dissection here in this region suggests surface runoff rather than groundwater sapping. Small dunes are also visible on the floors of some of these channels.<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. 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/PIA04008" onclick="window.open(this.href); return false;" title="Voir l'image PIA04008: Libya Montes sur le site de la NASA">Voir l'image PIA04008: Libya Montes sur le site de la NASA.</a></div>
PIA04008: Libya Montes
<h1>PIA04009: Dao Vallis</h1><div class="PIA04009" lang="en" style="width:461px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04009_context.jpg"></a><br><p>This THEMIS visible image shows Dao Vallis, a large outflow channel that starts on the southeast flank of a large volcano called Hadriaca Patera and runs for 1000 kilometers southwest into the Hellas impact basin. The channel is up to 20 kilometers wide near its source, but narrows downstream. As can be seen in the context image, the part of Dao Vallis imaged by THEMIS is actually one of the most narrow.<p>It is believed that Dao Vallis was carved by a combination of surface and subsurface flow. Evidence for both of these processes can be seen in this image. The size of the channel, its steep walls, and the lineations at the bottom of the channel indicate that it was carved by surface flow of water. The erosional morphology near the center of the image, on the northern edge of the channel indicates that groundwater sapping was also a minor process. Subsidence of the surface into the quasi-circular depressions seen in this image is indicative of this process.<p>Because the source region of Dao Vallis is the flank of a volcano, it is most likely that the water that carved the channel erupted from the subsurface as geothermal heating by nearby magma melted large amounts of ground ice. Some of this water made it to the surface and carved the channel, while some water flowed below ground and caused the sapping features evident in this THEMIS image.<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/PIA04009" onclick="window.open(this.href); return false;" title="Voir l'image PIA04009: Dao Vallis sur le site de la NASA">Voir l'image PIA04009: Dao Vallis sur le site de la NASA.</a></div>
PIA04009: Dao Vallis
<h1>PIA04010: Amazonis Planitia yardangs</h1><div class="PIA04010" lang="en" style="width:472px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04010_context.jpg"></a><br><p>This wind-swept region of Amazonis Planitia, northwest of the Olympus Mons Aureole deposit, has been so uniformly dissected into yardangs that only two craters provide any indication that other processes have ever been active on the surface.<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/PIA04010" onclick="window.open(this.href); return false;" title="Voir l'image PIA04010: Amazonis Planitia yardangs sur le site de la NASA">Voir l'image PIA04010: Amazonis Planitia yardangs sur le site de la NASA.</a></div>
PIA04010: Amazonis Planitia yardangs
<h1>PIA04011: Proctor Crater Dunes</h1><div class="PIA04011" lang="en" style="width:430px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04011_context.jpg"></a><br><p>This image, located near 30E and 47.5S, displays sand dunes within Proctor Crater. These dunes are composed of basaltic sand that has collected in the bottom of the crater. The topographic depression of the crater forms a sand trap that prevents the sand from escaping. Dune fields are common in the bottoms of craters on Mars and appear as dark splotches that lean up against the downwind walls of the craters. Dunes are useful for studying both the geology and meteorology of Mars. The sand forms by erosion of larger rocks, but it is unclear when and where this erosion took place on Mars or how such large volumes of sand could be formed. The dunes also indicate the local wind directions by their morphology. In this case, there are few clear slipfaces that would indicate the downwind direction. The crests of the dunes also typically run north-south in the image. This dune form indicates that there are probably two prevailing wind directions that run east and west (left to right and right to left).<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/PIA04011" onclick="window.open(this.href); return false;" title="Voir l'image PIA04011: Proctor Crater Dunes sur le site de la NASA">Voir l'image PIA04011: Proctor Crater Dunes sur le site de la NASA.</a></div>
PIA04011: Proctor Crater Dunes
<h1>PIA04012: Meroe Patera</h1><div class="PIA04012" lang="en" style="width:494px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04012_context.jpg"></a><br><p>This image is located in Meroe Patera (longitude: 292W/68E, latitude: 7.01), which is a small region within Syrtis Major Planitia. Syrtis Major is a low-relief shield volcano whose lava flows make up a plateau more than 1000 km across. These flows are of Hesperian age (Martian activity of intermediate age) and are believed to have originated from a series of volcanic depressions, called calderas. The caldera complex lies on extensions of the ring faults associated with the Isidis impact basin toward the northeast - thus Syrtis Major volcanism may be associated with post-impact adjustments of the Martian crust.<p>The most striking feature in this image is the light streaks across the image that lead to dunes in the lower left region. Wind streaks are albedo markings interpreted to be formed by aeolian action on surface materials. Most are elongate and allow an interpretation of effective wind directions. Many streaks are time variable and thus provide information on seasonal or long-term changes in surface wind directions and strengths. The wind streaks in this image are lighter than their surroundings and are the most common type of wind streak found on Mars. These streaks are formed downwind from crater rims (as in this example), mesas, knobs, and other positive topographic features.<p>The dune field in this image is a mixture of barchan dunes and transverse dunes. Dunes are among the most distinctive aeolian feature on Mars, and are similar in form to barchan and transverse dunes on Earth. This similarity is the best evidence to indicate that martian dunes are composed of sand-sized material, although the source and composition of the sand remain controversial. Both the observations of dunes and wind streaks indicate that this location has a windy environment - and these winds are persistent enough to product dunes, as sand-sized material accumulates in this region. These features also indicate that the winds in this region are originating from the right side of the image, and moving towards the left.<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/PIA04012" onclick="window.open(this.href); return false;" title="Voir l'image PIA04012: Meroe Patera sur le site de la NASA">Voir l'image PIA04012: Meroe Patera sur le site de la NASA.</a></div>
PIA04012: Meroe Patera
<h1>PIA04013: Tiu Valles</h1><div class="PIA04013" lang="en" style="width:491px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04012_context.jpg"></a><br><p>The ancient, catastrophic floods on Mars, whose origins remain a mystery, produced a channeled and scoured landscape like this one which is called Tiu Valles.<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/PIA04013" onclick="window.open(this.href); return false;" title="Voir l'image PIA04013: Tiu Valles sur le site de la NASA">Voir l'image PIA04013: Tiu Valles sur le site de la NASA.</a></div>
PIA04013: Tiu Valles
<h1>PIA04014: Ismeniae Fossae</h1><div class="PIA04014" lang="en" style="width:475px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04014_context.jpg"></a><br><p>A Fretted Channel dominates this region of Ismeniae Fossae which is located along the highland-lowland hemispheric dichotomy of the Red Planet. The topography of this region appears muted, most likely due to the presence of ground ice.<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/PIA04014" onclick="window.open(this.href); return false;" title="Voir l'image PIA04014: Ismeniae Fossae sur le site de la NASA">Voir l'image PIA04014: Ismeniae Fossae sur le site de la NASA.</a></div>
PIA04014: Ismeniae Fossae
<h1>PIA04015: Kasei Vallis</h1><div class="PIA04015" lang="en" style="width:483px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04015_context.jpg"></a><br><p>The scoured grooves in these catastrophic outflow channels, formed hundreds of million of years ago, have the appearance of wood grain. They now host dune-like ripples of windblown material.<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/PIA04015" onclick="window.open(this.href); return false;" title="Voir l'image PIA04015: Kasei Vallis sur le site de la NASA">Voir l'image PIA04015: Kasei Vallis sur le site de la NASA.</a></div>
PIA04015: Kasei Vallis
<h1>PIA04016: Rest In Peace Mars Polar Lander</h1><div class="PIA04016" lang="en" style="width:442px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04016_context.jpg"></a><br><p>Three years ago (December 3, 1999) Mars Polar Lander (MPL) was set to touchdown on the enigmatic layered terrain located near the South Pole. Unfortunately, communications with the spacecraft were lost and never regained. The Mars Program Independent Assessment Team concluded that this loss was most likely due to premature retrorocket shutdown resulting in the crash of the lander. The image primarily shows what appears to be a ridged surface with some small isolated hills.<p>Historically, exploration has and will continue to be a very hard and risky endeavor and sometimes you lose. But the spirit of exploration and discovery has served mankind well throughout the ages and it has now driven us to the far reaches of space. Therefore, with this in mind the THEMIS Team today is releasing an image of the region where MPL was set to land in memory of this mission and the unquenchable spirit of exploration. It is hoped that in the near future we will once again attempt another landing in the Martian polar regions.<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/PIA04016" onclick="window.open(this.href); return false;" title="Voir l'image PIA04016: Rest In Peace Mars Polar Lander sur le site de la NASA">Voir l'image PIA04016: Rest In Peace Mars Polar Lander sur le site de la NASA.</a></div>
PIA04016: Rest In Peace Mars Polar Lander
<h1>PIA04017: Trouvelot Crater Deposit</h1><div class="PIA04017" lang="en" style="width:505px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04017_context.jpg"></a><br><p>Like many of the craters in the Oxia Palus region of Mars, Trouvelot Crater hosts an eroded, light-toned, sedimentary deposit on its floor. Compared with the much larger example in Becquerel Crater to the NE, the Trouvelot deposit has been so eroded by the scouring action of dark, wind-blown sand that very little of it remains. Tiny outliers of bright material separated from the main mass attest to the once, more really extensive coverage by the deposit. A similar observation can be made for White Rock, the best known example of a bright, crater interior deposit. The origin of the sediments in these deposits remains enigmatic but they are likely the result of fallout from ash or dust carried by the thin martian atmosphere.<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/PIA04017" onclick="window.open(this.href); return false;" title="Voir l'image PIA04017: Trouvelot Crater Deposit sur le site de la NASA">Voir l'image PIA04017: Trouvelot Crater Deposit sur le site de la NASA.</a></div>
PIA04017: Trouvelot Crater Deposit
<h1>PIA04018: Buried Crater</h1><div class="PIA04018" lang="en" style="width:508px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04018_context.jpg"></a><br><p>With a location roughly equidistant between two of the largest volcanic constructs on the planet, the fate of the ~50 km impact crater in this image was sealed. It has been buried to the rim by lava flows. The MOLA context image shows pronounced flow lobes surrounding the crater, a clear indication of the most recent episode of volcanism that could have contributed to its infilling. Breaches in the rim are clearly evident in the image and suggest locations through which lavas could have flowed. These openings appear to be limited to the west side of the crater. Other craters in the area are nearly obliterated by the voluminous lava flows, further demonstrating one of the means by which Mars renews its surface.<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/PIA04018" onclick="window.open(this.href); return false;" title="Voir l'image PIA04018: Buried Crater sur le site de la NASA">Voir l'image PIA04018: Buried Crater sur le site de la NASA.</a></div>
PIA04018: Buried Crater
<h1>PIA04019: Ares Vallis Polygons</h1><div class="PIA04019" lang="en" style="width:495px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04019_context.jpg"></a><br><p>This jumble of eroded ridges and mesas occurs within Ares Vallis, one of the largest catastrophic outflow channels on the planet. Floods raged through this channel, portions of which are up to 25 km wide, pouring out into the Chryse Basin to the north. Close inspection of the THEMIS image reveals polygonal shapes on the floor of the channel system. Polygonal terrain on Mars is fairly common although the variety of forms and scales of the polygons suggests multiple modes of origin. Those in Ares Vallis resemble giant desiccation polygons that form in soils on Earth when a moist layer at depth drys out. While polygons can form in icy soils (permafrost) and even lava flows, their presence in a channel thought to have been carved by flowing water is at least consistent with a mode of origin that involved liquid water.<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/PIA04019" onclick="window.open(this.href); return false;" title="Voir l'image PIA04019: Ares Vallis Polygons sur le site de la NASA">Voir l'image PIA04019: Ares Vallis Polygons sur le site de la NASA.</a></div>
PIA04019: Ares Vallis Polygons
<h1>PIA04020: Tharsis Grooved Channel</h1><div class="PIA04020" lang="en" style="width:477px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04020_context.jpg"></a><br><p>The Tharsis Montes region on Mars is a major center of volcanic and tectonic activity. The channel in this image is west of the relatively small volcano called Biblis Patera although it shows no obvious relationship to that volcano. Instead, it may be related to the more distant, but more massive volcano Olympus Mons to the north. The channel may have hosted flowing lava at one time but now contains a material that has eroded into an impressive ridge-and-groove pattern. These features may be yardangs, landforms produced from the erosion by wind of sedimentary material.<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/PIA04020" onclick="window.open(this.href); return false;" title="Voir l'image PIA04020: Tharsis Grooved Channel sur le site de la NASA">Voir l'image PIA04020: Tharsis Grooved Channel sur le site de la NASA.</a></div>
PIA04020: Tharsis Grooved Channel
<h1>PIA04021: Impact Crater</h1><div class="PIA04021" lang="en" style="width:475px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04021_context.jpg"></a><br><p>The layering of material observed at the bottom of this impact crater suggests multiple depositional and erosional episodes in a changing environment.<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/PIA04021" onclick="window.open(this.href); return false;" title="Voir l'image PIA04021: Impact Crater sur le site de la NASA">Voir l'image PIA04021: Impact Crater sur le site de la NASA.</a></div>
PIA04021: Impact Crater
<h1>PIA04022: Kasei Vallis Streamlined Island</h1><div class="PIA04022" lang="en" style="width:481px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04022_context.jpg"></a><br><p>Except for the loss of its ring of ejecta, the crater at the leading edge of a streamlined island in Kasei Vallis shows no hint of the catastrophic floods that passed by it. Kasei Vallis is one of several major outflow channel systems that were active over 3 billion years ago. The intense floods scoured the landscape, eroding craters and producing streamlined islands. But in a close-up view, the evidence for these floods is not apparent. This true of the most similar terrestrial example, the channeled scablands of eastern Washington which also were formed by a catastrophic flood.<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/PIA04022" onclick="window.open(this.href); return false;" title="Voir l'image PIA04022: Kasei Vallis Streamlined Island sur le site de la NASA">Voir l'image PIA04022: Kasei Vallis Streamlined Island sur le site de la NASA.</a></div>
PIA04022: Kasei Vallis Streamlined Island
<h1>PIA04023: Viking Lander 2 Anniversary</h1><div class="PIA04023" lang="en" style="width:319px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04023_context.jpg"></a><br><p>This portion of a daytime IR image covers the Viking 2 landing site (shown with the X). The second landing on Mars took place September 3, 1976 in Utopia Planitia. The exact location of Lander 2 is not as well established as Lander 1 because there were no clearly identifiable features in the lander images as there were for the site of Lander 1. The Utopia landing site region contains pedestal craters, shallow swales and gentle ridges. The crater Goldstone was named in honor of the Tracking Station in the desert of California. The two Viking Landers operated for over 6 years (nearly four martian years) after landing. This one band IR (band 9 at 12.6 microns) image shows bright and dark textures, which are primarily due to differences in the abundance of rocks on the surface. The relatively cool (dark) regions during the day are rocky or indurated materials, fine sand and dust are warmer (bright). Many of the temperature variations are due to slope effects, with sun-facing slopes warmer than shaded slopes. The dark rings around several of the craters are due to the presence of rocky (cool) material ejected from the crater. These rocks are well below the resolution of any existing Mars camera, but THEMIS can detect the temperature variations they produce. Daytime temperature variations are produced by a combination of topographic (solar heating) and thermophysical (thermal inertia and albedo) effects. Due to topographic heating the surface morphologies seen in THEMIS daytime IR images are similar to those seen in previous imagery and MOLA topography.<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/PIA04023" onclick="window.open(this.href); return false;" title="Voir l'image PIA04023: Viking Lander 2 Anniversary sur le site de la NASA">Voir l'image PIA04023: Viking Lander 2 Anniversary sur le site de la NASA.</a></div>
PIA04023: Viking Lander 2 Anniversary
<h1>PIA04024: Terby Crater</h1><div class="PIA04024" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04024_context.jpg"></a><br><p>Perched on the northern rim of the enormous Hellas Basin, Terby Crater is host to an impressive range of landforms. As is common for many Martian craters, Terby has been filled with layered material, presumably sediments. The process of erosion has exposed some of these layers along with strange, rectilinear ridges. Sinuous channels, collapse pits, and a scoured-looking cap rock are some of the other interesting landforms in Terby. Such a variety of landforms attests to a diversity of rock types and geologic processes in the relatively small area of this THEMIS image.<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/PIA04024" onclick="window.open(this.href); return false;" title="Voir l'image PIA04024: Terby Crater sur le site de la NASA">Voir l'image PIA04024: Terby Crater sur le site de la NASA.</a></div>
PIA04024: Terby Crater
<h1>PIA04025: Fluidized crater ejecta</h1><div class="PIA04025" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04025_context.jpg"></a><br><p>The ejecta blanket of this crater does not resemble the blocky, discontinuous ejecta associated with most fresh craters on Mars. Rather, the continuous lobes of material seen around this crater are evidence that the crater ejecta were fluidized upon impact of the meteor that formed this crater. Impact ejecta become fluidized when a meteor strikes a surface that has a considerable volatile content. The volatiles mixed with the ejecta form a flow of material that moves outward from the crater and produces the morphology seen in this THEMIS visible image.<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/PIA04025" onclick="window.open(this.href); return false;" title="Voir l'image PIA04025: Fluidized crater ejecta sur le site de la NASA">Voir l'image PIA04025: Fluidized crater ejecta sur le site de la NASA.</a></div>
PIA04025: Fluidized crater ejecta
<h1>PIA04026: Ares Valles</h1><div class="PIA04026" lang="en" style="width:489px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04026_context.jpg"></a><br><p>This image covers a portion of Ares Valles. Ares Valles is an outflow channel carved into the surface of Mars by ancient catastrophic floods. The floods were most likely caused by huge discharges of groundwater at the channel heads. These floods are similar to (but much larger than) floods that created the Channeled Scablands in central Washington State during the last ice age on Earth. The Martian channels are hundreds of kilometers long and occur in a number of regions within equatorial Mars. The material that was eroded away by these floods was deposited as sediment in the northern lowlands. The Mars Pathfinder landing site is several hundred kilometers downstream from the location of this image and the surfaces are probably similar in nature.<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/PIA04026" onclick="window.open(this.href); return false;" title="Voir l'image PIA04026: Ares Valles sur le site de la NASA">Voir l'image PIA04026: Ares Valles sur le site de la NASA.</a></div>
PIA04026: Ares Valles
<h1>PIA04027: Crater Upon Crater</h1><div class="PIA04027" lang="en" style="width:477px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04027_context.jpg"></a><br><p>A pair of craters just north of the Hellas Basin demonstrate the rugged topography that can result when an impact occurs on the rim of an existing crater.<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/PIA04027" onclick="window.open(this.href); return false;" title="Voir l'image PIA04027: Crater Upon Crater sur le site de la NASA">Voir l'image PIA04027: Crater Upon Crater sur le site de la NASA.</a></div>
PIA04027: Crater Upon Crater
<h1>PIA04028: Candor Chasma on Mars, in Color</h1><div class="PIA04028" lang="en" style="width:641px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04028_context.jpg"></a><br><p>This image from the camera system on NASA. Mars Odyssey was acquired of Candor Chasma within Valles Marineris, centered near 5 degrees south latitude, 283 degrees east longitude. This visible color image shows the effects of erosion on a sequence of dramatically layered rocks. These layers were initially deposited within Candor Chasma and have subsequently been eroded by a variety of processes, including wind and down-slope motion due to gravity. Relatively dark materials appear to mantle some areas of the layered deposits; these dark materials are likely sand. Few impact craters of any size can be seen in this image, indicating that the erosion and transport of material is occurring at a relatively rapid rate, so that any craters that form are rapidly buried or eroded. This image was acquired using the thermal infrared imaging system.s visible bands 1 (centered at 420 nanometers), 2 (centered at 550 nanometers), and 3 (centered at 650 nanometers), and covers an area approximately 19 kilometers (12 miles) in width by 50 kilometers (50 miles) in length.<p>This and several other new color images can be obtained from the NASA Planetary Photojournal website.<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/PIA04028" onclick="window.open(this.href); return false;" title="Voir l'image PIA04028: Candor Chasma on Mars, in Color sur le site de la NASA">Voir l'image PIA04028: Candor Chasma on Mars, in Color sur le site de la NASA.</a></div>
PIA04028: Candor Chasma on Mars, in Color

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