Mars Odyssey's THEMIS Begins Posting Daily Images

MARSDAILY

Daily Themis Images
This THEMIS image shows a sinuous valley network channel with sharp bends cutting across the cratered highlands of the southern hemisphere of Mars. The channel is named Nirgal Vallis, which is from the Babylonian word for "Mars". Nirgal Vallis is a channel with a total length of approximately 500 km. It is approximately 6 km wide in this region. Gullies and alluvial deposits discovered by Mars Global Surveyor are clearly visible on the polar-facing (south) wall and floor of Nirgal Vallis. These gullies appear to emanate from a specific layer in the walls. There is a pronounced sparsity of gullies on the equator-ward facing slopes. The gullies have been proposed to have formed by the subsurface release of water. Patches of dunes are also seen on the channel floor, notably along the edges of the channel floor near the canyon walls. 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. This image is approximately 22 km wide and 60 km in length; north is toward the top.

Pasadena - Mar 31, 2002
Need to get away to someplace exotic? Mars is now open for daily sightseeing. Beginning March 27, 2002, recent images of Mars taken by the Thermal Emission Imaging System on NASA's Mars Odyssey spacecraft have been available to the public via the Internet.

A new, "uncalibrated" image taken by the visible light camera will be posted at 10 A.M. EST daily, Monday through Friday.

The images will show 22 kilometer-wide strips of the martian surface at a resolution of 18 meters. Though the images will not yet be fully calibrated for scientific use, they give the public an unprecedented opportunity to get a close look at many of Mars' unusual geological features.

The visible light camera's resolution is about eight to 16 times better than most of the images taken by NASA's Viking missions, which completed the first global map of the martian surface.

"We want to generate a steady flow of images so we can share some of the excitement of what we're seeing with the public," said Greg Mehall, THEMIS mission manager at Arizona State University.

"We're seeing a lot of very interesting things, since much of Mars has never been viewed so closely before."

Though the posted images have undergone only minimal image processing, the team wanted to share them with the public as soon as possible. "They're still pretty spectacular to look at," Mehall said. "And we want people to feel they are getting a first look at the images with us."

THEMIS began mapping Mars from an orbit of 420 kilometers in mid-February, taking images in both infrared and visible light The instrument is expected to take as many as 15,000 visible light images through the course of the mission.

The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the 2001 Mars Odyssey mission for NASA's Office of Space Science in Washington. Investigators at Arizona State University in Tempe, the University of Arizona in Tucson and NASA's Johnson Space Center, Houston, operate the science instruments. Additional science partners are located at the Russian Aviation and Space Agency and at Los Alamos National Laboratories, New Mexico. Lockheed Martin Astronautics, Denver, is the prime contractor for the project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL.

MARSDAILY

Mars Radiation Meter Back Online

Los Angeles - Mar 18, 2002
The Martian Radiation Environment Experiment - acronymically known as MARIE -- is back online and collecting more data. As the radiation monitor was fired up, MARIE's scientists reported Tuesday at the 33rd Lunar and Planetary Science Conference that the data she returned last year reveals that space radiation is even more intense than their models had indicated.

Thanks for being here; We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor $5 Billed Once credit card or paypal		SpaceDaily Monthly Supporter $5 Billed Monthly paypal only

The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.