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	CNN.com - NASA fights to revive Spirit on Mars - Jan. 24, 2004
		The craft, Spirit, has sent back little more than beeps and sporadic data bursts since Wednesday, forcing NASA engineers to scramble for answers at an inopportune time: an identical robot ship is poised to land on the other side of Mars on Saturday night or Sunday morning.
		Spirit was using an onboard motor to move its thermal spectrometer for a test when the motor unexpectedly conked out.
		If performing long-distance therapy on Spirit were not enough, NASA must guide an identical twin rover to a landing in Meridiani Planum, a high-elevation plain loaded with a mineral that often forms in the presence of water.
	www.cnn.com /2004/TECH/space/01/23/spirit.contact/index.html (600 words)

	The Best of Mars Spirit Lander Images
		The images were acquired on Spirit's sols 583 to 586 (Aug. 24 to 27, 2005), shortly after the rover reached the crest of "Husband Hill" inside Mars' Gusev Crater.
		Spirit arrived at the summit from the west, along the direction of the rover tracks seen in the middle right of the panorama.
		Spirit spent more than a month exploring the summit region, measuring the chemistry and mineralogy of soils and rocky outcrops at the peak of Husband Hill for comparison with similar measurements obtained during the ascent.
	www.solarviews.com /eng/spiritgallery.htm (1471 words)

	Mars Exploration Rover Spirit 2004
		Spirit's main antenna is oriented towards Earth for a high-speed transmission of pictures and data from Mars, and commands and software changes from the mission control at the Jet Propulsion Laboratory to Spirit.
		The rover is expected to move over a given distance, precisely position itself with respect to a target, and deploy its instruments to take close-up pictures and analyze the minerals or elements of rocks and soil.
		Launched on 10 June 2003, landed on Mars on 3 January 2004, Mars Exploration Rover Spirit was the fourth spacecraft to have achieved a successful landing on Mars, along with Viking I and Viking II in the 1970's, and the Mars Pathfinder in 1997.
	www.geocities.com /tdl.geo/mer.html (4936 words)

	Spirit rover - Wikipedia, the free encyclopedia
		Spirit (official designation: MER-A) is the first of the two rovers of the Mars Exploration Rover mission.
		Spirit was commanded to transmit engineering data, and on 23 January sent several short low-bitrate messages before finally transmitting 73 megabits via X band to Mars Odyssey.
		Spirit's next stop was originally planned to be the north face of McCool Hill, where Spirit would receive adequate sunlight during the Martian winter.
	en.wikipedia.org /wiki/Spirit_rover (3009 words)

	BBC NEWS \| Science/Nature \| Spirit rover faces long repairs
		Spirit has not worked properly since Wednesday, when a command was sent for it to test an instrument motor.
		Spirit started to experience problems on Wednesday during a test of a motor used to move the Mini-Thermal Emission Spectrometer, an instrument that can determine the mineral composition of rocks.
		The rover landed on Mars on 3 January on a three-month mission to explore the geological history of the planet.
	news.bbc.co.uk /2/hi/science/nature/3424835.stm (607 words)

	USATODAY.com - Spirit rover hits rock paydirt; Opportunity toils away (Site not responding. Last check: 2007-10-20)
		NASA's Spirit rover spies a rock outcropping at the base of the "Columbia Hills." Spirit is driving in reverse to counter a balky front wheel.
		NASA scientists were elated at Spirit's rocky find, which came as the rover rolled backwards along the foot of a region called the West Spur at the Columbia Hills.
		Meanwhile, rover drivers are steering the rover in reverse, which handlers said resembles driving with an anchor along the side.
	www.usatoday.com /tech/news/2004-07-19-rovers-roving_x.htm (879 words)

	Spirit Rover On Mars Goes Silent After Breakdown
		Spirit suffered a "very serious anomaly" and stopped normal transmissions on Wednesday but a signal was received overnight, reviving hopes of working out the communications problems with the spacecraft, flight controllers with the National Aeronautics and Space Administration said.
		Spirit is in the Gusev Crater, a rock-strewn, dusty terrain that NASA experts believe might have once been a lake.
		Spirit is in the Gusev Crater, a rock-strewn, dusty terrain that NASA experts believe might have once been a lake and so could have supported life if there was water.
	www.spacedaily.com /news/mars-mers-04zh.html (2626 words)

	Mars Exploration Rover Mission: The Mission
		Spirit performs crabbing by steering the two rear wheels toward the stuck right front wheel, thus opposing resistance from the right front wheel and keeping yawing (swinging from side to side) to a minimum.
		Sol 1159 (April 7, 2007): Spirit acquired data from Elizabeth Mahon using the Mössbauer spectrometer, acquired panoramic camera images of a target known as "Tars Tarkas," and studied a rock known as "Johanna Hargraves" using the miniature thermal emission spectrometer.
		Sol 1161: Spirit acquired a survey of rock clasts using the panoramic camera, a survey at high sun with the panoramic camera, data using the Mössbauer spectrometer from a target known as "Muriel Coben" and a rock called "Elise Harney," and data on atmospheric density of argon gas using the alpha-particle X-ray spectrometer.
	marsrovers.jpl.nasa.gov /mission/status.html (984 words)

	spirit lander (Site not responding. Last check: 2007-10-20)
		The rover encountered a 10-centimetre drop, descending at an angle of 115 degrees and heading in a north-west direction.
		The Spirit rover is being commanded during sol 36, which ends at 5:21 a.m.
		The rock abrasion tool on NASA's Spirit rover ground off the surface of a patch 45.5 millimeters (1.8 inches) in diameter and 2.65 millimeters (0.1 inch) deep, exposing fresh interior material of the rock for close inspection with the rover's microscopic imager and two spectrometers on the robotic arm.
	mysite.wanadoo-members.co.uk /blobrana/database/spiritorg.htm (1113 words)

	SPACE.com -- Spirit Rover Regains Science Capability
		This image from Spirit was taken and sent to Earth on Wednesday, Jan. 28.
		Once at Bonneville, scientists operating Spirit are prepared to search for rocks that may have been excavated from below the surface and tossed outward by the impact that dug the crater.
		Spirit would then "turn and head for the hills" to the southeast, Arvidson said.
	www.space.com /missionlaunches/spirit_update_040130.html (791 words)

	cooltech.iafrica.com \| space Spirit rover powers up
		Spirit has already relayed its first fl and white images of Mars back to jubilant NASA scientists, 360-degree colour images of the environment around Spirit were expected by late Sunday.
		The six-wheeled rover is currently parked on the Gusev crater, an immense rock-strewn plain some 15 degrees south of the Martian equator.
		A second NASA rover, Opportunity, is scheduled to land on Mars on January 25, on the opposite side of the planet.
	cooltech.iafrica.com /space/294386.htm (831 words)

	Spirit update, Jan 23, 2004 (Site not responding. Last check: 2007-10-20)
		Meanwhile, Spirit's twin rover, Opportunity, is on track for a Sunday (Jan. 25) 12:05 Eastern Time landing in Meridiani Planum, on the opposite side of Mars.
		Spirit's problems were causing increasing anxiety when, at 5:02 a.m.
		Comparing Spirit to a hospital patient, Theisinger said the rover was in critical condition.
	www.news.cornell.edu /releases/rover/SpiritTalks.bpf.html (438 words)

	Water detection at Gusev crater described
		This study (by Haskin et al.) covered the investigation of Spirit rover sols (a sol is a Martian day) 1 through 156, with the major discoveries occurring after sol 80.
		Spirit was on sol 597 on Sept 6 and on the summit of Husband Hill.
		This mini-panorama was taken by Spirit on Aug. 23, 2005, just as the rover finally completed its intrepid climb up "Husband Hill." The summit appears to be a windswept plateau of scattered rocks, little sand dunes and small exposures of outcrop.
	news-info.wustl.edu /tips/page/normal/5514.html (730 words)

	USATODAY.com - Mars Spirit rover finishes primary mission (Site not responding. Last check: 2007-10-20)
		The mission's key tasks included a requirement that one of the rovers travel at least 1,980 feet — a mark Spirit surpassed on Saturday.
		Between the two of them, the rovers also had to take stereo and color panoramas of their surroundings, drive to at least eight locations and operate simultaneously for a minimum of 30 days.
		Spirit landed Jan. 3 in Gusev Crater, a 90-mile-diameter depression scientists believed once contained a lake.
	www.usatoday.com /tech/news/2004-04-05-rover_x.htm (444 words)

	Mars Rover "Spirit" Images
		This image taken by the panoramic camera on the Mars Exploration Rover Spirit shows a trench dug by the rover on its way toward the "Columbia Hills." Measurements taken of the soil contained in the trench by Spirit's alpha particle X-ray spectrometer showed the presence of sulfur and magnesium.
		Spirit is scheduled to dig a trench at the bottom of "Laguna Hollow" on sol 47.
		In the distance stand the east hills, which are closest to the Mars Exploration Rover Spirit in comparison to other hill ranges seen on the martian horizon.
	nssdc.gsfc.nasa.gov /planetary/mars/mars_exploration_rovers/mera_images.html (1822 words)

	Spirit Rolls
		The drive moved Spirit 3 meters (10 feet) in 78 seconds, ending with the back of the rover about 80 centimeters (2.6 feet) away from the foot of the egress ramp, said JPL's Joel Krajewski, leader of the team that developed the sequence of events from landing to drive-off.
		With the rover on the ground, an international team of scientists assembled at JPL will be making daily decisions about how to use the rover for examining rocks, soils and atmosphere with a suite of scientific instruments onboard.
		Spirit was launched from Cape Canaveral on June 10, 2003.
	science.nasa.gov /headlines/y2004/15jan_spiritrolls.htm (721 words)

	On firm dirt, Rover ready to paw Mars \| csmonitor.com
		All told, the rover had been flung across space, scorched in the atmosphere, and then bounced 900 feet across the landscape in a protective shell of airbags.
		Spirit will start cautiously before setting out on an ambitious journey within Gusev that could bring it to the lip of a smaller, dune-filled crater and up the slopes of a range of distant hills.
		Spirit's grinding wheel can shave fractions of an inch off rocks, revealing older layers, and perhaps providing clues about what the region was like billions of years ago, when it was thought to be a lake.
	www.csmonitor.com /2004/0116/p01s01-stss.html (1320 words)

	NASA's Spirit rover examines unusual rock
		NASA's Spirit rover stopped to examine an unusual, flaky rock on the surface of Mars Sunday as scientists prepared to send it on a trek that would more than double its one-day distance record.
		Spirit's longest previous trek was 70 feet in a day, the record for any robot on the Martian surface.
		Spirit, the robotic geologist to roam on Mars
	www.chinadaily.com.cn /english/doc/2004-02/16/content_306399.htm (372 words)

	NASA's Solar System Exploration: News & Events: 11.15.06: Spirit Rover Update
		Spirit is receiving a little over 320 Watt-hours now and is able to occasionally use the Moessbauer or alpha particle X-ray spectrometer overnight.
		Spirit then used its front hazard avoidance cameras to look at the robotic arm's work volume, then unstowed the arm and took a stereo microscopic image of target "Berkner Island." The rover then placed the alpha particle X-ray spectrometer on Berkner Island and integrated for four hours.
		Spirit used its miniature thermal emission spectrometer to stare at target "Davis" during the afternoon when NASA's Mars Odyssey spacecraft passed overhead.
	solarsystem.nasa.gov /news/display.cfm?News_ID=16896 (348 words)

	BBC NEWS \| Science/Nature \| Spirit rover sights 'blueberries'
		Nasa's Mars rover Spirit has discovered structures resembling the spheres its twin buggy, Opportunity, has found on the other side of the Red Planet.
		Spirit has also spotted unusual geological features which scientists have named "Rotten Rocks" due to their resemblance to rotting loaves of bread.
		On Tuesday, Spirit was roughly 50m (164ft) from the base of its target location of the Columbia Hills.
	news.bbc.co.uk /1/hi/sci/tech/3813719.stm (509 words)

	Spirit rover sets Martian driving record
		The Spirit rover broke a one-day distance record for Mars Tuesday, rolling 21 metres across the planet's surface.
		The rover maps the terrain into green, yellow and red areas; the first two are safe for driving while red must be avoided.
		Spirit is moving towards a small rock called White Boat and will then head to Bonneville Crater, about 240 metres from its lander.
	www.cbc.ca /news/story/2004/02/10/mars_rovers040210.html (1224 words)

	SPACE.com -- Spirit Rover Traces Mars' Explosive Past, Opportunity Slowly Digs Out
		The rover took 11 days to move 10 inches, though its wheels spun enough to carry it 157 feet if there were no slippage.
		The rover is slowly but surely inching its way out of a deep sand dune, though mission managers don’t expect to free the robot for another few weeks.
		It took the Spirit rover months to clamber up Husband Hill’s steep, slippery side, during which time the robot found little to suggest the region differed from the volcanic rock remains scattered across the rest of Gusev Crater.
	www.space.com /missionlaunches/050524_rovers_update.html (949 words)

	NASA's Solar System Exploration: News & Events: 09.01.05: NASA's Durable Spirit Sends Intriguing New Images From Mars
		Working atop a range of Martian hills, NASA's Spirit rover is rewarding researchers with tempting scenes filled with evidence of past planet environments.
		Spirit and twin rover, Opportunity, successfully completed their three-month prime missions in April 2004.
		It was selected for the Spirit mission because the shape of the terrain suggests the crater once held a lake.
	sse.jpl.nasa.gov /news/display.cfm?News_ID=11755 (664 words)

	SignOnSanDiego.com > News > Science/Health -- Spirit of success: Rover lands on Mars
		Spirit now sits in a huge basin the size of Connecticut called Gusev Crater, which scientists believe might once have been a lake bed that harbored life billions of years ago.
		Spirit's mission will be to explore the region to find geologic signs that water existed.
		Spirit began its journey June 10, on an arcing path to Mars.
	www.signonsandiego.com /news/science/20040104-9999_1n4mars.html (1132 words)

	CNN.com - Rover hits one-year mark on Mars - Jan 3, 2005
		The Mars rover Spirit has come a long way since it hurtled down through the planet's atmosphere and came to a bouncy, airbag-protected stop at Gusev Crater on January 3, 2004.
		A software problem dogged Spirit in the early weeks of its mission when it fell silent for a period, but engineers were able to work through the glitch and resume the rover's science mission.
		Spirit has experienced other quirks, such as a finicky wheel that has left it dependent on only five of its six wheels to rove about Mars.
	www.cnn.com /2005/TECH/space/01/03/rover.anniversary/index.html (553 words)

	EETimes.com - The trouble with Rover is revealed
		The trouble with the Mars rover Spirit started much earlier in the mission than the day the craft stopped communicating with ground controllers.
		The Spirit rover has a radiation-hardened R6000 CPU from Lockheed-Martin Federal Systems at the heart of the system.
		Klemm explained that as data is collected by Spirit, files are created and stored in the flash file system until a communications window opens — an opportunity to transmit the data either directly to Earth or to one of the two orbiters circling the Red Planet.
	www.eetimes.com /story/OEG20040220S0046 (1276 words)

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