Mission Mars Odyssey - 2

<h1>PIA04095: Terra Tyrrhena</h1><div class="PIA04095" lang="en" style="width:475px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04095_context.jpg"></a><br><p>Old, heavily cratered volcanic terrain in Terra Tyrrhena within the Martian southern highlands.<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>Image information: VIS instrument. Latitude -28, Longitude 78.6 East (281.4 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04095" onclick="window.open(this.href); return false;" title="Voir l'image PIA04095: Terra Tyrrhena sur le site de la NASA">Voir l'image PIA04095: Terra Tyrrhena sur le site de la NASA.</a></div>
PIA04095: Terra Tyrrhena
<h1>PIA04096: Crater Rim</h1><div class="PIA04096" lang="en" style="width:486px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04096_CONTEXT.jpg"></a><br><p>The late afternoon sun casts a shadow over a 700 meter-high rim of Huygens 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>Image information: VIS instrument. Latitude -15.2, Longitude 51.6 East (308.4 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04096" onclick="window.open(this.href); return false;" title="Voir l'image PIA04096: Crater Rim sur le site de la NASA">Voir l'image PIA04096: Crater Rim sur le site de la NASA.</a></div>
PIA04096: Crater Rim
<h1>PIA04097: Nilosyrtis Mensae</h1><div class="PIA04097" lang="en" style="width:477px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04097_CONTEXT.jpg"></a><br><p>The floors of these craters contain very interesting and enigmatic materials which may contain shallow subsurface ground ice with varying amounts of a sediment covering (mantle). When ice is covered with a critical thickness of sediment it is actually insulated and can survive longer than cleaner exposed ice. The ablation and sublimation of the ice causes a chaotic topography to develop with high and low regions. This may explain the relief seen on the crater floors. The terrain outside of the craters appears muted because it is most likely mantled with a dusty icy covering. This region of Mars is located along the highland/lowland boundary dichotomy.<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>Image information: VIS instrument. Latitude 35.1, Longitude 71 East (289 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04097" onclick="window.open(this.href); return false;" title="Voir l'image PIA04097: Nilosyrtis Mensae sur le site de la NASA">Voir l'image PIA04097: Nilosyrtis Mensae sur le site de la NASA.</a></div>
PIA04097: Nilosyrtis Mensae
<h1>PIA04098: Mamers Valles</h1><div class="PIA04098" lang="en" style="width:475px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04098_context.jpg"></a><br><p>A broad channel in the Deuteronilus Mensae region displays the strange landforms common to the northern mid-latitudes where ground ice likely plays a role in their formation. A tongue-shaped feature at the bottom of this image looks surprisingly glacier-like in its morphology.<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>Image information: VIS instrument. Latitude 37.1, Longitude 15.3 East (344.7 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04098" onclick="window.open(this.href); return false;" title="Voir l'image PIA04098: Mamers Valles sur le site de la NASA">Voir l'image PIA04098: Mamers Valles sur le site de la NASA.</a></div>
PIA04098: Mamers Valles
<h1>PIA04099: Chasma Boreal Dunes</h1><div class="PIA04099" lang="en" style="width:477px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04099_context.jpg"></a><br><p>The large sand sheets and dunes observed in this THEMIS image are located near the north pole of Mars. Changes in surface albedo across the image are likely due to variable thicknesses of dark sand that cover lighter surfaces. Layering of units is observed near the top of the image and is evidence to changing conditions throughout the geologic history of Mars.<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>Image information: VIS instrument. Latitude 37.1, Longitude 15.3 East (19.1 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04099" onclick="window.open(this.href); return false;" title="Voir l'image PIA04099: Chasma Boreal Dunes sur le site de la NASA">Voir l'image PIA04099: Chasma Boreal Dunes sur le site de la NASA.</a></div>
PIA04099: Chasma Boreal Dunes
<h1>PIA04100: The So-called "Face on Mars" at Night</h1><div class="PIA04100" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04100_context.jpg"></a><br><p>This pair of THEMIS infrared images shows the so-called "face on Mars" landform viewed during both the day and night. The nighttime THEMIS IR image was acquired on Oct. 24, 2002; the daytime image was originally released on July 24, 2002. Both images are of THEMIS's 9th IR band (12.57 microns), and they have been geometrically projected for image registration. The "face on Mars" is located in the northern plains of Mars near 40° N, 10° W (350 ° E). This knob can be seen in the daytime image because of the temperature differences between the sunlit (warm and bright) and shadowed (cold and dark) slopes. The temperature in the daytime scene ranges from -50 °C (darkest) to -15 °C (brightest). At night many of the hills and knobs in this region are difficult to detect because the effects of heating and shadowing on the slopes are no longer present. The temperatures at night vary from approximately -90 °C (darkest) to -75 °C (warmest). The nighttime temperature differences are due primarily to differences in the abundance of rocky materials that retain their heat at night and stay warm. Fine grained dust and sand cools of more rapidly at night. The circular rims and eject of many of the craters in this region are warm at night, showing that rocks are still present on the steep walls inside the craters and in the ejecta material that was blasted out when the craters formed. Some craters have cold (dark) material on their floors in the night IR image, indicating that fine-grained material is accumulating within the craters. Many knobs and hills, including the "face" have rocky (warm at night) material on their slopes and ridges.<p>The THEMIS infrared camera provides an excellent regional view of Mars - these images cover an area 32 kilometers (~20 miles) by approximately 50 kilometers (~30 miles) at a resolution of 100 meters per picture element ("pixel"). The scenes are tilted differently because the Odyssey orbit is inclined by 3° from the true north-south direction, and the spacecraft is flying from north-to-south on the day side and from south-to-north on the night side of the planet. These images provide a broad perspective of the landscape and geology of the Cydonia region, showing numerous knobs and hills that have been eroded into a remarkable array of different shapes. In these views the Cydonia region is seen to numerous interesting knobs and mesas that are similar in many ways to the knob named the "face." The 3-km long "face" knob was first imaged by the Viking spacecraft in the 1970's and was seen by some to resemble a face carved into the rocks of Mars. Since that time the Mars Orbiter Camera on the Mars Global Surveyor spacecraft and the THEMIS visible and infrared cameras on Mars Odyssey have provided detailed views of this hill that clearly show that it is a normal geologic feature with slopes and ridges carved by eons of wind and downslope motion due to gravity. Many of the knobs in Cydonia, including the "face," have several flat ledges partway up the hill slopes. These ledges are made of more resistant layers of rock and are the last remnants of layers that once were continuous across this entire region. Erosion has completely removed these layers in most places, leaving behind only the small isolated hills and knobs seen today.<p>Note: this THEMIS infrared 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/PIA04100" onclick="window.open(this.href); return false;" title="Voir l'image PIA04100: The So-called "Face on Mars" at Night sur le site de la NASA">Voir l'image PIA04100: The So-called "Face on Mars" at Night sur le site de la NASA.</a></div>
PIA04100: The So-called "Face on Mars" at Night
<h1>PIA04104: THEMIS Images as Art #57</h1><div class="PIA04104" lang="en" style="width:468px;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>A spooky skull stares out of the Martian plain.</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/PIA04104" onclick="window.open(this.href); return false;" title="Voir l'image PIA04104: THEMIS Images as Art #57 sur le site de la NASA">Voir l'image PIA04104: THEMIS Images as Art #57 sur le site de la NASA.</a></div>
PIA04104: THEMIS Images as Art #57
<h1>PIA04105: THEMIS Images as Art #58</h1><div class="PIA04105" lang="en" style="width:320px;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>X marks the spot!</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/PIA04105" onclick="window.open(this.href); return false;" title="Voir l'image PIA04105: THEMIS Images as Art #58 sur le site de la NASA">Voir l'image PIA04105: THEMIS Images as Art #58 sur le site de la NASA.</a></div>
PIA04105: THEMIS Images as Art #58
<h1>PIA04106: THEMIS Images as Art #59</h1><div class="PIA04106" lang="en" style="width:288px;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>Perhaps a louse, or maybe some sort of unicellular organism?</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/PIA04106" onclick="window.open(this.href); return false;" title="Voir l'image PIA04106: THEMIS Images as Art #59 sur le site de la NASA">Voir l'image PIA04106: THEMIS Images as Art #59 sur le site de la NASA.</a></div>
PIA04106: THEMIS Images as Art #59
<h1>PIA04107: THEMIS Images as Art #60</h1><div class="PIA04107" lang="en" style="width:612px;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>Looks kind of like something George Jetson would drive, I think...</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/PIA04107" onclick="window.open(this.href); return false;" title="Voir l'image PIA04107: THEMIS Images as Art #60 sur le site de la NASA">Voir l'image PIA04107: THEMIS Images as Art #60 sur le site de la NASA.</a></div>
PIA04107: THEMIS Images as Art #60
<h1>PIA04108: Crater Comparison</h1><div class="PIA04108" lang="en" style="width:584px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04108_fig1.jpg"></a><br /></p><p>These two craters show the two types of crater interiors found on Mars -- original and modified. The crater on the right has its original bowl shape. The crater of the left has had its interior modified by an infilling of lava.</p><p>Image information: VIS instrument. Latitude 27.6, Longitude 194.5 East (165.5 West). 37 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04108" onclick="window.open(this.href); return false;" title="Voir l'image PIA04108: Crater Comparison sur le site de la NASA">Voir l'image PIA04108: Crater Comparison sur le site de la NASA.</a></div>
PIA04108: Crater Comparison
<h1>PIA04111: Crater Interior with Internal Craters</h1><div class="PIA04111" lang="en" style="width:526px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04111_fig1.jpg"></a><br /></p><p>Today's crater interior contains smaller craters, sand dunes, and erosional features caused the wind. Additionally, the crater rim appears subdued, likely due to dust cover. Note how the ejecta surrounding the small craters has be eroded by the wind.</p><p>Image information: VIS instrument. Latitude 9, Longitude 358 East (2 West). 18 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04111" onclick="window.open(this.href); return false;" title="Voir l'image PIA04111: Crater Interior with Internal Craters sur le site de la NASA">Voir l'image PIA04111: Crater Interior with Internal Craters sur le site de la NASA.</a></div>
PIA04111: Crater Interior with Internal Craters
<h1>PIA04118: Infilled Crater</h1><div class="PIA04118" lang="en" style="width:550px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04118_fig1.jpg"></a><br /></p><p>This crater interior was filled by a thick accumulation of material. The fill is now undergoing removal, exposing the floor beneath the material. The way the surface layer is breaking up and eroding indicates that volatiles, such as ice, may be present in the upper layer. </p><p>Image information: VIS instrument. Latitude 36, Longitude 351.9 East (8.1 West). 18 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04118" onclick="window.open(this.href); return false;" title="Voir l'image PIA04118: Infilled Crater sur le site de la NASA">Voir l'image PIA04118: Infilled Crater sur le site de la NASA.</a></div>
PIA04118: Infilled Crater
<h1>PIA04119: Infilled Crater</h1><div class="PIA04119" lang="en" style="width:552px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04119_fig1.jpg"></a><br /></p><p>As with yesterday's crater, this crater has been infilled by a material that likely contains volatiles. The linear to swirled surface marking indicate the the fill flowed as it was filling the crater interior. The volatile could be ice, in which case the flow features are related to glacial action. Or the volatile could have been water, and the infilling material was mud. </p><p>Image information: VIS instrument. Latitude 36, Longitude 46.1 East (313.9 West). 18 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04119" onclick="window.open(this.href); return false;" title="Voir l'image PIA04119: Infilled Crater sur le site de la NASA">Voir l'image PIA04119: Infilled Crater sur le site de la NASA.</a></div>
PIA04119: Infilled Crater
<h1>PIA04120: Refilled Crater</h1><div class="PIA04120" lang="en" style="width:504px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04120_fig1.jpg"></a><br /></p><p>The interior of this crater has undergone at least two episodes of modification. At some time the crater interior was filled by material to approximately the high of the crater rim. Then erosion occurs, removing some of the infill but leaving the two plateaus in the center. Finally, the crater has been infilled a second time. The latest fill is lava.<p>Image information: VIS instrument. Latitude 13.5, Longitude 284.3 East (75.7 West). 36 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04120" onclick="window.open(this.href); return false;" title="Voir l'image PIA04120: Refilled Crater sur le site de la NASA">Voir l'image PIA04120: Refilled Crater sur le site de la NASA.</a></div>
PIA04120: Refilled Crater
<h1>PIA04121: Crater Ejecta</h1><div class="PIA04121" lang="en" style="width:560px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04121_fig1.jpg"></a><br /></p><p>From crater exteriors we move to looking at crater ejecta with today's image. Note the radial "spokes" on the top of the ejecta surrounding the crater. These surface features are formed during the ballistic emplacement of the ejecta and other materials being thrown out of the crater by the force of the impact.<p>Image information: VIS instrument. Latitude 34.6, Longitude 326.1 East (33.9 West). 18 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04121" onclick="window.open(this.href); return false;" title="Voir l'image PIA04121: Crater Ejecta sur le site de la NASA">Voir l'image PIA04121: Crater Ejecta sur le site de la NASA.</a></div>
PIA04121: Crater Ejecta
<h1>PIA04123: Eroded Ejecta</h1><div class="PIA04123" lang="en" style="width:532px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04123_fig1.jpg"></a><br /></p><p>This crater still retains some of the radial "spoke" features on top of the main ejecta, but some erosion has occurred and will continue to modify the surface until no surface features formed during emplacement are left.</p><p>Image information: VIS instrument. Latitude 30.4, Longitude 108.1 East (251.9 West). 37 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04123" onclick="window.open(this.href); return false;" title="Voir l'image PIA04123: Eroded Ejecta sur le site de la NASA">Voir l'image PIA04123: Eroded Ejecta sur le site de la NASA.</a></div>
PIA04123: Eroded Ejecta
<h1>PIA04126: Radial Erosion</h1><div class="PIA04126" lang="en" style="width:536px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04126_fig1.jpg"></a><br /></p><p>The ejecta surrounding the crater (off image to the left) in this image has undergone significant erosion by the wind. The wind has stripped the surface features from the ejecta and has started to winnow away the ejecta blanket. Near the margin of the ejecta the wind is eroding along a radial pattern -- taking advantage of radial emplacement. Note the steep margin of the ejecta blanket. Most, if not all, of the fine ejecta material has been removed and the wind in now working on the more massive continuous ejecta blanket.</p><p>Image information: VIS instrument. Latitude 12.5, Longitude 197.4 East (162.6 West). 37 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04126" onclick="window.open(this.href); return false;" title="Voir l'image PIA04126: Radial Erosion sur le site de la NASA">Voir l'image PIA04126: Radial Erosion sur le site de la NASA.</a></div>
PIA04126: Radial Erosion
<h1>PIA04127: Craters Filling Craters</h1><div class="PIA04127" lang="en" style="width:543px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><a href="/figures/PIA04127_fig1.jpg"></a><br /></p><p>In today's image the large crater retains its original bowl shaped interior and the radial surface pattern on the ejecta. Just to the south is a crater that has been infilled by ejecta from the larger crater. The overlapping of ejecta blankets can be used to get relative age relationships, in this case the smaller crater to the south formed first, and the larger crater formed sometime later.</p><p>Image information: VIS instrument. Latitude 29.6, Longitude 96.3 East (263.7 West). 37 meter/pixel resolution.</p><p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.</p><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/PIA04127" onclick="window.open(this.href); return false;" title="Voir l'image PIA04127: Craters Filling Craters sur le site de la NASA">Voir l'image PIA04127: Craters Filling Craters sur le site de la NASA.</a></div>
PIA04127: Craters Filling Craters
<h1>PIA04260: Gusev Crater</h1><div class="PIA04260" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This mosaic of daytime infrared images of Gusev Crater, taken by the camera system on the Mars Odyssey spacecraft, has been draped over topography data obtained by Mars Global Surveyor. The daytime temperatures range from approximately minus 45 degrees C (black) to minus 5 degrees C (white). The temperature differences in these daytime images are due primarily to lighting effects, where sunlit slopes are warm (bright) and shadowed slopes are cool (dark). Gusev crater is a potential landing site for the Mars Exploration Rovers. The large ancient river channel of Ma'Adim that once flowed into Gusev can be seen at the top of the mosaic. This image mosaic covers an area approximately 180 kilometers (110 miles) on each side centered near 14 degrees S, 175 degrees E, looking toward the south in this simulated view.<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 was provided by Arizona State University, Tempe. Lockheed Martin Astronautics, Denver, Colo., is the prime contractor for the 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/PIA04260" onclick="window.open(this.href); return false;" title="Voir l'image PIA04260: Gusev Crater sur le site de la NASA">Voir l'image PIA04260: Gusev Crater sur le site de la NASA.</a></div>
PIA04260: Gusev Crater
<h1>PIA04261: Gusev Crater</h1><div class="PIA04261" lang="en" style="width:800px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This mosaic of nighttime infrared images of Gusev Crater, taken by the camera system on the Mars Odyssey spacecraft, has been draped over topography data obtained by Mars Global Surveyor. Variations in nighttime temperatures are due to differences in the abundance of rocky materials that retain their heat at night and stay relatively warm (bright). Fine grained dust and sand (dark) cools off more rapidly at night. This image mosaic covers an area approximately 180 kilometers (110 miles) on each side centered near 14 degrees S, 175 degrees E, looking toward the south in this simulated view.<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 was provided by Arizona State University, Tempe. Lockheed Martin Astronautics, Denver, Colo., is the prime contractor for the 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/PIA04261" onclick="window.open(this.href); return false;" title="Voir l'image PIA04261: Gusev Crater sur le site de la NASA">Voir l'image PIA04261: Gusev Crater sur le site de la NASA.</a></div>
PIA04261: Gusev Crater
<h1>PIA04263: Western Arcadia Planitia</h1><div class="PIA04263" lang="en" style="width:686px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;">This is a Mars Odyssey visible color image of an unnamed crater in western Arcadia Planitia (near 39 degrees N, 179 degrees E). The crater shows a number of interesting internal and external features that suggest that it has undergone substantial modification since it formed. These features include concentric layers and radial streaks of brighter, redder materials inside the crater, and a heavily degraded rim and ejecta blanket. The patterns inside the crater suggest that material has flowed or slumped towards the center. Other craters with features like this have been seen at both northern and southern mid latitudes The distribution of these kinds of craters suggests the possible influence of surface or subsurface ice in the formation of these enigmatic features. The image was taken on September 29, 2002 during late northern spring. This is an approximate true color image, generated from a long strip of visible red (654 nm), green (540 nm), and blue (425 nm) filter images that were calibrated using a combination of pre-flight measurements and Hubble images of Mars. The colors appear perhaps a bit darker than one might expect; this is most likely because the images were acquired in late afternoon (roughly 4:40 p.m. local solar time) and the low Sun angle results in an overall darker surface.<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 was provided by Arizona State University, Tempe. Lockheed Martin Astronautics, Denver, Colo., is the prime contractor for the 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/PIA04263" onclick="window.open(this.href); return false;" title="Voir l'image PIA04263: Western Arcadia Planitia sur le site de la NASA">Voir l'image PIA04263: Western Arcadia Planitia sur le site de la NASA.</a></div>
PIA04263: Western Arcadia Planitia
<h1>PIA04400: Remnants of Lost Geology</h1><div class="PIA04400" lang="en" style="width:485px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04400_context.jpg"></a><br><p>In eastern Arabia Terra, remnants of a once vast layered terrain are evident as isolated buttes, mesas, and deeply-filled craters. The origin of the presumed sediments that created the layers is unknown, but those same sediments, now eroded, may be the source of the thick mantle of dust that covers much of Arabia Terra today.<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>Image information: VIS instrument. Latitude 20.5, Longitude 50 East (310 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04400" onclick="window.open(this.href); return false;" title="Voir l'image PIA04400: Remnants of Lost Geology sur le site de la NASA">Voir l'image PIA04400: Remnants of Lost Geology sur le site de la NASA.</a></div>
PIA04400: Remnants of Lost Geology
<h1>PIA04401: Dust Devil Streaks</h1><div class="PIA04401" lang="en" style="width:458px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04401_context.jpg"></a><br><p>At first glance, the dust devil streaks observed in this THEMIS image of the martian northern plains may look similar to many other images. However, what makes this THEMIS image so interesting are the many streaks that trend over hills, mounds, and valleys. Many of the dust devil streaks previously observed occur in very flat and dusty regions. This unique image gives hints to the dynamic nature of the dust devil streak formational process.<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>Image information: VIS instrument. Latitude 53.8, Longitude 200.9 East (159.1 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04401" onclick="window.open(this.href); return false;" title="Voir l'image PIA04401: Dust Devil Streaks sur le site de la NASA">Voir l'image PIA04401: Dust Devil Streaks sur le site de la NASA.</a></div>
PIA04401: Dust Devil Streaks
<h1>PIA04402: Etched Terrain in Terra Meridiani</h1><div class="PIA04402" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04402_context.jpg"></a><br><p>Eroded, or "etched" terrain dominates the field of view of this THEMIS visible image acquired over eastern Terra Meridiani. At the bottom of many craters and in other areas, dunes are present. On the left hand side of the image, a darker layer embays the etched terrain. Several knobs from the etched terrain can still be seen, though, indicating that this layer is rather thin.<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>Image information: VIS instrument. Latitude 1.6, Longitude 5.5 East (354.5 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04402" onclick="window.open(this.href); return false;" title="Voir l'image PIA04402: Etched Terrain in Terra Meridiani sur le site de la NASA">Voir l'image PIA04402: Etched Terrain in Terra Meridiani sur le site de la NASA.</a></div>
PIA04402: Etched Terrain in Terra Meridiani
<h1>PIA04403: Arabia Terra</h1><div class="PIA04403" lang="en" style="width:493px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04403_context.jpg"></a><br><p>Impact crater with rampart ejecta blanket in Arabia Terra.<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>Image information: VIS instrument. Latitude 5.8, Longitude 5.5 East (354.2 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04403" onclick="window.open(this.href); return false;" title="Voir l'image PIA04403: Arabia Terra sur le site de la NASA">Voir l'image PIA04403: Arabia Terra sur le site de la NASA.</a></div>
PIA04403: Arabia Terra
<h1>PIA04404: Arabia Terra Streaks</h1><div class="PIA04404" lang="en" style="width:497px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04404_context.jpg"></a><br><p>Accumulations of thick dust give way down slopes, crater walls, and other steep terrain, leaving the dark streaks that are common in the dusty region of Arabia Terra.<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>Image information: VIS instrument. Latitude 14.7, Longitude 20.3 East (339.7 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04404" onclick="window.open(this.href); return false;" title="Voir l'image PIA04404: Arabia Terra Streaks sur le site de la NASA">Voir l'image PIA04404: Arabia Terra Streaks sur le site de la NASA.</a></div>
PIA04404: Arabia Terra Streaks
<h1>PIA04405: A Tale of Two Craters</h1><div class="PIA04405" lang="en" style="width:506px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04405_context.jpg"></a><br><p>In western Acidalia, two craters of similar size (a few km's) dramatically display the effects of geologic activity. The younger one on the left has been left relatively well preserved, retaining a sharp rim crest, a classic bowl shape, and a clearly defined ejecta blanket. The older one on the right likely has experienced a flood of lava that covered over the ejecta and filled in the bowl (note the breach in the rim). Its rim crest has been worn down by a multitude of subsequent impacts.<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>Image information: VIS instrument. Latitude 35.9, Longitude 311.1 East (48.9 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04405" onclick="window.open(this.href); return false;" title="Voir l'image PIA04405: A Tale of Two Craters sur le site de la NASA">Voir l'image PIA04405: A Tale of Two Craters sur le site de la NASA.</a></div>
PIA04405: A Tale of Two Craters
<h1>PIA04406: Ice Clouds</h1><div class="PIA04406" lang="en" style="width:446px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04406_context.jpg"></a><br><p>Heavy water ice clouds almost completely obscure the surface in Vastitas Borealis.<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>Image information: VIS instrument. Latitude 69.5, Longitude 283.6 East (76.4 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04406" onclick="window.open(this.href); return false;" title="Voir l'image PIA04406: Ice Clouds sur le site de la NASA">Voir l'image PIA04406: Ice Clouds sur le site de la NASA.</a></div>
PIA04406: Ice Clouds
<h1>PIA04407: Layered Deposits in Terby Crater</h1><div class="PIA04407" lang="en" style="width:481px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04407_context.jpg"></a><br><p>This somewhat cloudy THEMIS visible image shows a stunning example of layered deposits in Terby crater, just north of the Hellas impact basin. Some researchers argue that layered terrain in craters were deposited by water. However, in some places, layered deposits will extend for up to a kilometer above the crater rim, leading others to conclude that they must be volcanic airfall deposits.<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>Image information: VIS instrument. Latitude -27.3, Longitude 74.3 East (285.7 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04407" onclick="window.open(this.href); return false;" title="Voir l'image PIA04407: Layered Deposits in Terby Crater sur le site de la NASA">Voir l'image PIA04407: Layered Deposits in Terby Crater sur le site de la NASA.</a></div>
PIA04407: Layered Deposits in Terby Crater

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