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October 31, 2012
Mars rover gets instructions daily from NASA via a network of antennae
The Washington Post
We live in a chaos of electromagnetic energy. Visible, infrared and ultraviolet light courses omnidirectionally from the sun. A fraction of it bathes our planet, while some bounces off other planets, moons, comets and meteoroids. The visible light from stars up to 4,000 light-years away can be seen from Earth with the naked eye. With instruments, astronomers can detect gamma rays from stars 13 billion light-years away. Radio waves from remote galaxies help Earth’s official timekeepers monitor our planet’s path around the sun.
Once per day, a minuscule stream of radio waves joins this cacophony, making the 13.8-minute trip from an antenna on Earth to an SUV-size machine parked on the surface of Mars. Those short-lived waves represent our way — our only way — of communicating with Curiosity, the rover that NASA landed on Mars in August.
August 30, 2011
NASA Tests Communication Scenarios For Near-Earth Asteroids
Irish Weather Online
NASA’s Desert Research and Technology Studies (RATS) team has commenced testing communication scenarios for near-Earth asteroids.
The RATS team also is evaluates technology, human-robotic systems and extravehicular equipment in the high desert near Flagstaff, Arizona.
Field testing provides a knowledge base that helps scientists and engineers design, build and operate better equipment, and establish requirements for operations and procedures. The Arizona desert has a rough, dusty terrain and extreme temperature swings that simulate conditions that may be encountered on other surfaces in space.
August 25, 2011
NASA’s lasercom system aims to beam a HD video feed from Mars
Geek.com
As cameras technology has allowed us to increase the resolution of the images we capture and video we watch, so has the bandwidth required to transfer that imagery. In space, the amount of data that can be sent is currently limited due to the radio frequency (RF) systems being relied upon.
NASA is trying to fix that limitation by testing a new communications system called a Laser Communication Relay (LCR). LCR is a desirable replacement because the optical/laser communication system (lasercom) allows for much higher data transfer rates while retaining the same size, weight and power requirements of existing RF systems. What that also means is a smaller optical system can still transmit at a decent data rate too, but save on power, weight, and size on board a satellite.
The difference in data rates is quoted as being as much as 100x that of existing RF systems and is the equivalent of trying to transfer data over broadband compared to Wi-Fi. The example NASA gives is the Mars Reconnaissance Orbiter (MRO) which manages a 6Mbps data rate. The lasercom system would increase that to 100Mbps, meaning a high resolution image would arrive on Earth in 5 minutes rather than the current 90 minutes MRO takes.
October 16, 2009
New concept may enhance Earth-Mars communication
Direct communication between Earth and Mars can be strongly disturbed and even blocked by the Sun for weeks at a time, cutting off any future human mission to the Red Planet. An ESA engineer working with engineers in the UK may have found a solution using a new type of orbit combined with continuous-thrust ion propulsion. The European researchers studied a possible solution to a crucial problem affecting future human missions to Mars: how to ensure reliable radio communication even when Mars and Earth line up at opposite sides of the Sun, which then blocks any signal between mission controllers on Earth and astronauts on the red surface. The natural alignment, known as a conjunction, happens approximately every 780 days, and would seriously degrade and even block transmission of voice, data and video signals.
May 05, 2005
Mars Telecommunications Orbiter: Interplanetary Broadband
Lockheed Martin Space Systems is expected to land a $500 million contract to build the Mars Telecommunication Orbiter, said Roger Gibbs, MTO project manager at JPL in Pasadena, California. The MTO is intended by NASA to pioneer the use of lasers in planet-to-planet communication; the intended launch date will be sometime in 2009. The Mars Telecommunication Orbiter will be the first interplanetary spacecraft whose main mission is to provide communications services to other missions. It will orbit Mars at a higher altitude than most orbiters, about 2,800 miles above the Martian surface. This will provide an enhanced line of site to Earth. The spacecraft will communicate with Earth via two radio bands and a new optical communications terminal, which will demonstrate the use of a near-infrared laser beam for interplanetary communications.
April 14, 2005
Mars and back in 40 minutes
The Age
"The speed of light is far too slow for the internet of the future," says Vinton Cerf, the man often called one of the fathers of the global communications system on which most of the world now depends. He was speaking in Melbourne yesterday to the Committee for Economic Development of Australia, drawing a picture of the huge social and economic impact the internet will have on the world in the next five years and beyond. His problem with the speed of light is related to an interplanetary communications "backbone" due to be implemented in 2009 to speed investigation of the solar system. Scientists will use internet technology to communicate with robots touring Mars, but, Dr Cerf said, there was a problem - even at the speed of light, a message took 20 minutes to get to Earth and 20 more to get back to Mars.
March 20, 2005
Scientists Start Testing Model Of Manned Mars Lander
RIA Novosti
The manned Mars mission project has entered a new phase, as Russia's Keldysh Research Institute has started tests of the components and equipment of an interplanetary craft. They are now testing a model of the future Martian lander in a wind tunnel.
March 12, 2005
NASA Mars Program Under Scrutiny
NASA’s Mars program could undergo major alternation, driven by budgetary and technical issues, as well as science goals. “We’ve been getting inputs, advice, actions items…from the road mapping teams,” said Doug McCuistion, Mars Exploration Program Director at NASA Headquarters in Washington, D.C. “Nothing is finalized at this point. There have been no final decisions made or, frankly, any interim decisions made as yet.”
November 15, 2004
NASA To Test Laser Communications With Mars Spacecraft
Work is underway to establish the first interplanetary laser communication link. The $300 million NASA experiment, if successful, will connect robotic spacecraft at Mars with scientists back on Earth via a beam of light traveling some 300 million kilometers. For scientists eager to download bandwidth-intensive imagery and other data collected by planetary orbiters, probes and landers, the laser communications would offer a dramatic breakthrough in the amounts of information spacecraft can reliably transmit back to Earth.
November 08, 2004
Cell phone map may aid Mars rovers
The Albuquerque Tribune
Cell phone companies would have a hard time setting up service on Mars. There are no maps of where communications signals will break up and no way to tell how radio waves will travel through the planet's thin atmosphere or how the iron-rich soil might blur them, at least not yet. It's not likely cell phone companies will set up service on the planet anytime soon, but a network could certainly help the National Aeronautics and Space Administration as it sends rovers to explore the remote and often rocky terrain, said Steve Horan, director of the Center for Space Telemetering and Telecommunications Systems at New Mexico State University.
September 27, 2004
Private initiative plans research flight to Mars until 2009
German TV ZDF
An association from scientists, engineers and technicians plans a research flight up to the year 2009 to Mars. Up to then the Marburger association AMSAT wants to send a satellite as well as a probe according to data of a speaker to the neighbour planet of the earth. The association has approximately 1200 members country widely, that work all to a large extent honorary on the project.
September 18, 2004
Towards an internet in space
The internet, or at least the protocols behind it, are being extended into space. The man credited by many with having created the net, Vint Cerf, explains his vision of an interplanetary net.
September 13, 2004
Testing Deep Space Laser Communications
TelecomDirect News
When astronauts first touch down on Mars, they may talk back to Earth on a direct laser link rather than over a conventional radio. The light-based technology could also be used to communicate with future robotic spacecraft. NASA and MIT Lincoln Laboratory researchers are laying the groundwork for the first interplanetary laser communications system. In 2010, the Mars Laser Communication Demonstration (MLCD) will test the first deep-space laser communication link, which promises to transmit data at a rate nearly ten times higher than any existing interplanetary radio communication connection
August 11, 2004
Relays from Mars Show International Interplanetary Networking
One of NASA's Mars rovers has sent pictures relayed by the European Space Agency's Mars Express orbiter for the first time, demonstrating that the orbiter could serve as a communications link if needed. The link-up was part of a set of interplanetary networking demonstrations paving the way for future Mars missions to rely on these networking capabilities. The American and European agencies planned them as part of continuing efforts to cooperate in space exploration.
August 06, 2004
MIT-NASA team to test first interplanetary laser communication link
MIT
A NASA–MIT Lincoln Laboratory team will forge the first laser communication link between Mars and Earth. This unique experiment, part of NASA's Vision for Space Exploration, will greatly benefit the transmission of data from robotic spacecraft. In 2010, the Mars Laser Communication Demonstration (MLCD) will test the first deep-space laser communication link, which promises to transmit data at a rate nearly ten times higher than any existing interplanetary radio communication link.
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