Space

December 5, 2012

NASA Opportunity rover finishes walkabout on Mars crater rim

The latest work assignment for NASA’s long-lived Mars rover Opportunity is a further examination of an area where the robot just completed a walkabout.

“If you are a geologist studying a site like this, one of the first things you do is walk the outcrop, and that’s what we’ve done with Opportunity,” said Steve Squyres, the mission’s principal investigator at Cornell University in Ithaca, N.Y.

Coming up on its ninth anniversary, Opportunity still is a capable robotic explorer. It has been investigating a crater-rim site where observations from orbiting Mars spacecraft detected traces of clay minerals, which form under wet, non-acidic conditions that can be favorable for life. The rover’s current activities were presented at the Fall Meeting of the American Geophysical Union in San Francisco.

The rover team chose this site as a driving destination years earlier. The site is named Matijevic Hill in honor of the late Jacob Matijevic, who led the engineering team for the twin Mars exploration rovers Spirit and Opportunity for several years.

Opportunity drove about 1,160 feet in a counterclockwise circuit around Matijevic Hill in October and November, bringing the total miles driven on the mission to 22 miles. Researchers used the rover to survey the extent of Matijevic Hill outcrops and identify the best places to investigate further.

“We’ve got a list of questions posed by the observations so far,” Squyres said. “We did this walkabout to determine the most efficient use of time to answer the questions. Now we have a good idea what we’re dealing with, and we’re ready to start the detailed work.”

The hill is on the western rim of Endeavour Crater, a bowl 14 miles in diameter. An impact from a celestial object dug this crater more than 3 billion years ago, pushing rocks onto the rim from a greater depth than Opportunity reached during its first several years on Mars. Since the impact, those rocks may have been altered by environmental conditions. Sorting out the relative ages of local outcrops is a key to understanding the area’s environmental history.

“Almost nine years into a mission planned to last for three months, Opportunity is fit and ready for driving, robotic-arm operations and communication with Earth,” said the mission’s deputy project scientist, Diana Blaney, of NASA’s Jet Propulsion Laboratory in Pasadena, Calif.

Two outcrops of high interest on Matijevic Hill are “Whitewater Lake” and “Kirkwood.” Whitewater Lake is light-toned material that science team members believe may contain clay. Kirkwood contains small spheres with composition, structure and distribution that differ from other iron-rich spherules, nicknamed blueberries, that Opportunity found at its landing site and throughout the Meridiani Planum area it has explored. Squyres calls the Kirkwood spheres “newberries.”

“We don’t know yet whether Whitewood Lake and Kirkland are from before or after the crater formed,” he said. “One of the most important things to work out is the order and position of the rock layers to tell us the relative ages. We also need more work on the composition of Whitewater and debris shed by Whitewater to understand the clay signature seen from orbit, and on the composition of the newberries to understand how they formed.”

NASA launched Spirit and Opportunity in 2003. Both completed their three-month prime missions in April 2004 with Spirit ceasing operations in 2010. The mission’s goal is to learn about the history of wet environments on ancient Mars. JPL manages the Mars Exploration Rover Project for NASA’s Science Mission Directorate at NASA Headquarters in Washington.

 




All of this week's top headlines to your email every Friday.


 
 

 

Headlines April 23, 2014

News: U.S. conducts spy flights over Russia - After a tit-for-tat series of delays, the United States conducted an Open Skies Treaty intelligence flight over Russian territory April 21, a State Department official said.  Army paratroopers heading to Poland after Russian annexation of Crimea - U.S. Army paratroopers are arriving in Poland to begin a series of...
 
 

News Briefs April 23, 2014

U.S. military deaths in Afghanistan at 2,177 As of April 22, 2014, at least 2,177 members of the U.S. military had died in Afghanistan as a result of the U.S.-led invasion of Afghanistan in late 2001, according to an Associated Press count. The AP count is one less than the Defense Department’s tally. At least...
 
 

Northrop Grumman sets new greenhouse gas emission reduction goal of 30 percent by 2020

Northrop Grumman announced April 22 its commitment to reduce greenhouse gas emissions by 30 percent from 2010 levels by 2020, as part of its commemoration of Earth Day.   “Northrop Grumman is dedicated to top performance in environmental sustainability,” said Wes Bush, chairman, chief executive officer and president. “This new goal sets the bar significantly...
 

 

Lockheed Martin demonstrates enhanced ground control system, software for small UAV

Lockheed Martin’s Group 1 family of unmanned aircraft systems is migrating to enhanced automation capabilities using its Kestrelô “Fly Light” flight control systems and industry-leading mobile Ground Control Station software. The increased automation allows operators to focus on executing the mission, rather than flying various aircraft. Earlier this year, Lockheed MartinR...
 
 

U.S. Navy awards General Dynamics $33 million to operate, maintain military sealift ships

The U.S. Navy has awarded General Dynamics American Overseas Marine LLC a $32.7 million contract modification to operate and maintain seven large, medium-speed, roll-on / roll-off ships for the Military Sealift Command. AMSEA is a wholly owned subsidiary of General Dynamics. Under the terms of the modification, AMSEA will provide services including crewing, engineering, maintenance,...
 
 

US Navy deploys Standard Missile-3 Block IB for first time

In partnership with the Missile Defense Agency, the U.S. Navy deployed the second-generation Standard Missile-3 Block IB made by Raytheon for the first time, initiating the second phase of the Phased Adaptive Approach. “The SM-3 Block IB’s completion of initial operational testing last year set the stage for a rapid deployment to theater,” said Dr....
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>