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This article needs additional citations for verification. Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (March 2008) Mars Telecommunications Orbiter Organization: NASA Major Contractors: JPL Mission Type: Planetary Science, Mars Exploration Satellite of: Mars Launch: Cancelled Launch Vehicle: Possibly an Atlas V(401) or a Delta-4M. End of Mission: Cancelled Planned Mission Duration: 1 year cruise plus 10 years on orbit Mass: 1,800 kilograms NSSDC ID: Undetermined Webpage: JPL's MTO web page Orbital elements Semimajor Axis: 5,000 kilometers Eccentricity: Unknown Inclination: Unknown Orbital Period: Unknown Aphelion: Unknown Perihelion: Unknown Orbits: Unknown Planned Instruments Electra : Relay science data from future Mars missions Optical Communications Payload: Demonstrate laser communications to Earth Narrow Angle Camera: Support canister detection Orbiting Sample Demonstration Canister: Technology demonstration The Mars Telecommunications Orbiter was a cancelled Mars mission that was originally intended to launch in 2009 and would have established an Interplanetary Internet between Earth and Mars. The spacecraft would have arrived in a high orbit above Mars in 2010 and relayed data packets to Earth from a variety of Mars landers and orbiters for as long as ten years, at an extremely high data rate. Such a dedicated communications satellite was thought to be necessary due to the vast quantity of scientific information to be sent to Earth by such landers as the Mars Science Laboratory. However, on July 21, 2005, it was announced that MTO had been cancelled due to the need to support other short-term goals, including a Hubble servicing mission, Mars Exploration Rover extended mission operations, ensuring that the Mars Science Laboratory would fly in 2009, and to save an Earth science mission called Glory from cancellation.[1] Contents 1 Data transfer technology 2 Proposed successors 3 References 4 External links // Data transfer technology The Mars Telecommunications Orbiter was a project to demonstrate optical communications using laser, instead of usual radiowaves. "Lasercom sends information using beams of light and optical elements, such as telescopes and optical amplifiers, rather than RF signals, amplifiers, and antennas" [2] Proposed successors After the cancellation of the Telecommunications Orbiter, a broader mission was proposed as the Mars Science and Telecommunications Orbiter.[3] However, this mission was soon criticized as lacking well-defined parameters and objectives.[4] Another mission has since been proposed as the 2013 Mars Science Orbiter. The communications capability provided by the Mars Reconnaissance Orbiter and Mars Express science missions has proven substantial, demonstrating that dedicated relay satellites may be unnecessary in the near future. References ^ Text of a Letter from the President to the Speaker of the House of Representatives July 15, 2005 | SpaceRef - Your Space Reference ^ Townes, Stephen A. et al.. "The Mars Laser Communication Demonstration" (PDF). http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/38024/1/04-0216.pdf. Retrieved April 28, 2008.  ^ NASA (March 2006). "NASA MEPAG: Mars Science and Telecommunications Orbiter (DRAFT)". http://www.marstoday.com/news/viewsr.html?pid=20324.  ^ NASA (2006). "Assessment of NASA's Mars Architecture 2007-2016". http://books.nap.edu/openbook.php?record_id=11717&page=1.  External links End-to-End Information System Concept for the Mars Telecommunications Orbiter – March, 2006 NASA JPL report describing the mission. NASA To Test Laser Communications With Mars Spacecraft – By Brian Berger, Space News, 25 May 2005 v • d • e Failed and cancelled Mars missions Failed at launch Marsnik program (Mars 1960A and 1960B) · Mars 2MV-4 No.1 · Mars 2MV-3 No.1 · Mariner 3 · Mars 2M No.521 · Mars 2M No.522 · Mariner 8 · Kosmos 419 · Mars 96 Failed en route Mars 1 · Zond 2 · Mars 6 · Mars 7 · Phobos 1 · Mars Observer · Nozomi · Mars Climate Orbiter · Mars Polar Lander · Deep Space 2 · Beagle 2 Cancelled Voyager · Marsokhod (Mars 4NM) · Mars sample return (Mars 5NM) · Mars Surveyor 2001 Lander · NetLander · Mars Telecommunications Orbiter · Beagle 3 This Mars spacecraft- or satellite-related article is a stub. You can help Wikipedia by expanding it. v • d • e