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Topic: Mars Global Surveyor

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	Mars Global Surveyor
		When Mars Global Surveyor launched on November 7, 1996, it carried with it a limited amount of propellant, and the spacecraft was expected to run out of fuel in April of 2003, ending the capability to steer the ship with small engine thrusters and point the science instruments accurately.
		Mars Global Surveyor was designed to circle in a polar orbit (traveling over the north pole to the south pole and back to the north pole) once every two hours, twelve times a day, collecting global "snapshots" from 400 kilometers (249 miles) above the martian surface.
		Mars Global Surveyor's suite of science instruments included a high-resolution camera and a mineral detector that have helped engineers and scientists select safe landing sites rich in various minerals like hematite, a mineral often formed in liquid water, that help rover and landed missions search for more clues about the history of water on Mars.
	mars.jpl.nasa.gov /mgs/overview (586 words)

	Mars Global Surveyor - Wikipedia, the free encyclopedia
		The Surveyor spacecraft was launched from the Cape Canaveral Air Station in Florida on November 7, 1996 aboard a Delta-7925 rocket.
		Surveyor used this aerobraking technique over a period of four months to lower the high point of its orbit from 54,000 kilometers to altitudes near 450 kilometers.
		Mars Global Surveyor now also functions as a communications satellite to relay data back to Earth from the MER surface landers.
	en.wikipedia.org /wiki/Mars_Global_Surveyor (1287 words)

	Mars Global Surveyor
		This suspension of aerobraking was performed because air pressure from the atmosphere caused one of Surveyor's two solar panel s to bend backward by a slight amount.
		In the desired orientation for mapping operations, the spacecraft always crossed the day-side equator at 2:00 p.m.(local Mars time) moving from south to north.
		During mapping operations, the spacecraft circled Mars once every 118 minutes at an average altitude of 378 kilometers (235 miles).
	www.nebulasearch.com /encyclopedia/article/Mars_Global_Surveyor.html (754 words)

	Mars Global Surveyor
		The science objectives involve high resolution imaging of the surface, studies of the topography and gravity, the role of water and dust on the surface and in the atmosphere of Mars, the weather and climate of Mars, the composition of the surface and atmosphere, and the existence and evolution of the Martian magnetic field.
		Mars Global Surveyor is the first spacecraft to be launched in a decade-long exploration of Mars by NASA.
		Mars Global Surveyor imaging scientists presented evidence for ancient large bodies of water at a press briefing on Monday, December 4, 2000.
	nssdc.gsfc.nasa.gov /planetary/marsurv.html (1039 words)

	✓ Mars_Global_Surveyor - Weltraummedizin.de - Weltraummedizin (Site not responding. Last check: 2007-10-09)
		Mars Global Surveyor (MGS) ist eine Raumsonde der NASA zum Mars.
		Das Projekt Mars Global Surveyor entstand mit der Zielvorgabe, schnell eine kostengÃ¼nstige Mars-Erforschungsmission zu entwickeln.
		Oktober 2001 erhielt Mars Global Surveyor zudem Gesellschaft durch die NASA-Sonde 2001 Mars Odyssey, nachdem 1999 die beiden Missionen Mars Climate Orbiter und Mars Polar Lander gescheitert waren.
	weltraummedizin.de /index.php/Mars_Global_Surveyor (2039 words)

	Mars Global Surveyor
		The Mars Orbiter Camera provides daily wide-angle images of Mars similar to weather photos of Earth and narrow-angle images of objects as small as 1.5 meters across.
		The Mars Orbiter Laser Altimeter bounces a laser beam off the surface to measure accurately the height of mountains and the depth of valleys.
		One of the conclusions suggested by high-resolution images from MGS is that, although Mars had a watery past, it may never have rained.
	www.daviddarling.info /encyclopedia/M/MGS.html (373 words)

	SPACE.com -- NASA Loses Contact With Mars Global Surveyor
		NASA's Mars Global Surveyor (MGS) spacecraft has failed to check in with Earth for the fifth straight day in a row, after losing contact during a routine adjustment of its solar array.
		The spacecraft was originally tasked with examining Mars for a full Martian year, roughly two Earth years.
		Operations were slated to end in early 2001, but like the two Mars rovers, Opportunity and Spirit, MGS was continued to perform so admirably that its mission was repeatedly extended, most recently on Oct. 1 of this year.
	www.space.com /news/061110_mgs_missing.html (611 words)

	Mars Global Surveyor: Mars For Press
		Liquid water, as opposed to the water ice and water vapor known to exist at Mars, is considered necessary for life.
		Mars Global Surveyor has discovered tens of thousands of gullies on slopes inside craters and other depressions on Mars.
		The camera photographed approximately 98 percent of Mars in 1999 and approximately 30 percent of the planet was photographed again in 2006.
	mars.jpl.nasa.gov /mgs/newsroom/20061206b.html (761 words)

	NASA - Mars Global Surveyor
		Global Surveyor has taken pictures of gullies and debris flow features that suggest there may be current sources of liquid water, similar to an aquifer, at or near the surface of the planet.
		After studying Mars four times as long as originally planned, NASA's Mars Global Surveyor orbiter appears to have succumbed to battery failure caused by a complex sequence of events involving the onboard computer memory and ground commands.
		Scientists have observed two gullies on Mars that have fresh deposits, which they believe were formed by water flowing out within the past five or seven years.
	www.nasa.gov /mission_pages/mgs/index.html (311 words)

	Mars Global Surveyor
		MGS is the first mission of the Mars Surveyor Program, which is an aggressive series of orbiters and landers designed to provide new global and close-up images of Mars.
		MGS will be a polar orbiting spacecraft at Mars designed to monitor global weather and provide global maps of surface topography and distribution of minerals.
		Mars Balloon Relay to serve as a data relay for planned future surface stations and atmospheric experiments.
	www.astronautix.com /craft/marveyor.htm (453 words)

	Human error may have doomed Mars Global Surveyor
		NASA is investigating whether incorrect software commands may have doomed the Mars Global Surveyor spacecraft, which abruptly fell silent last year after a decade of meticulously mapping the Red Planet.
		If the Global Surveyor's demise is traced to a technical error, the mistake raises questions about why engineers did not catch the problem before the software program was sent to the spacecraft.
		The Global Surveyor, which lost contact with Earth in November, was the oldest of six active spacecraft on or circling Mars.
	www.cbc.ca /technology/story/2007/01/11/tech-mars.html (1466 words)

	Universe Today » Archive » Contact Lost With Mars Global Surveyor
		NASA’s Mars Global Surveyor has failed to check in with Earth for more than a week, causing concerns at the space agency.
		Engineers are striving to restore full communications with NASA’s Mars Global Surveyor on the 10th anniversary of the spacecraft’s Nov. 7, 1996, launch.
		On Nov. 2, one orbit after commands were sent for a routine maneuver to move the solar panels, the spacecraft reported that the motor moving one of the arrays had experienced errors.
	www.universetoday.com /2006/11/10/contact-lost-with-mars-global-surveyor (595 words)

	Mars global surveyor
		UFOS at close sight: Mars, news from Mars Global Surveyor.
		Red planet veteran Mars Global Surveyor (MGS) successfully photographed mars global surveyor.The image made by a camera aboard the Mars Global Surveyor shows a dark dot.
		Photographs from NASA's Mars Global Surveyor spacecraft released today are thefirst pictures ever taken of a spacecraft orbiting a foreign planet by.
	www.lookfinance.com /mars-global-surveyor.html (349 words)

	FOXNews.com - NASA Losing Hope of Finding Mars Global Surveyor - Science News \| Current Articles
		After more than two weeks of silence from the Mars Global Surveyor, NASA will make other tries to locate it, but scientists were pessimistic.
		The $154 million surveyor, which was supposed to last only two years, but continued sending data for almost a decade, is the oldest of six different active space probes on or circling the red planet.
		Christensen called the global surveyor "a workhorse" because of its numerous and diverse scientific instruments.
	www.foxnews.com /story/0,2933,231177,00.html (925 words)

	Mars Global Surveyor
		After studying Mars four times as long as originally planned, NASA's Mars Global Surveyor orbiter appears to have succumbed to battery failure.
		NASA has formed an internal review board to investigate why the Mars Global Surveyor went silent in November 2006.
		NASA photographs have revealed bright new deposits seen in two gullies on Mars that suggest water carried sediment through them sometime during the past seven years.
	mars.jpl.nasa.gov /mgs (223 words)

	Mars Global Surveyor Mars Orbiter Camera Image Gallery
		All MOC data acquired from Mars orbit have been sent to the NASA PDS: http://ida.wr.usgs.gov/.
		Most of the high resolution images are obtained by careful planning and inspection of predicted MGS orbits by Mars scientists working at and/or visiting MSSS.
		The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, CA and Denver, CO.
	www.msss.com /moc_gallery (240 words)

	JPL.NASA.GOV: Multimedia
		The Spirit rover found soil deposits on Mars that were formed by processes that require the presence of water.
		Grab a pair of 3-D glasses and explore Earth, Mars and more.
		Many of these images will also be on display at JPL's Open House.
	www.jpl.nasa.gov /multimedia (200 words)

	Mars Global Surveyor - Welcome to Mars!
		Animations showing the spacecraft in relation to Mars during aerobraking.
		Over 4,600 pages of detailed Mars Global Surveyor mission documents in Adobe PDF files.
		Mars Global Surveyor Radio Science Team Education Outreach Program
	mars.sgi.com /mgs/index.html (314 words)

	CNN: Mars Global Surveyor
		ind out how the Mars Global Surveyor works with this VRML (Virtual Reality Modeling Language) model.
		This episode shows how the Surveyor scans and collects data from the surface of Mars, and allows you to click on the craft's components to learn how they function.
		First you'll need a PC with at least a 133 MHz Pentium
	cnn.com /SPECIALS/multimedia/vrml/surveyor (91 words)

	Error 404: File Not Found \| The Planetary Society (Site not responding. Last check: 2007-10-09)
		Send an email to tps@planetary.org to let us know which web page
		Exploring Mars on Earth: The Arctic Mars Analogue Svalbard Expedition
		Meteor Showers: Where, When, and How to Look for Them
	www.planetary.org /explore/topics/space_missions/mars_global_surveyor (85 words)

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