Thursday, November 20, 2008

NASA completes test of 'Internet interplanetary'

A NASA successfully completed the first trials of a network of communications from space designed along the lines of the Internet.


A report from the Jet Propulsion Laboratory (JPL) of NASA said that its engineers used in last October a special software to send dozens of images of a ship that is more than 32 million kilometers from Earth.

For this, the engineers resorted to the network of JPL Deep Space Network of NASA using the probe as a liaison Epoxy which moves in the direction of comet Hartley, which should occur in 10 years.

"This is the first step towards the creation of an ability to communicate in entirely new space, an interplanetary Internet," said Adrian Hooke, director of technology and networks of NASA space in Washington.

The transmission is based on software called Disruption-Tolerant Networking (DTN), whose protocol was developed ten years ago, according to the JPL.

DTN sends information using a different method of protocols that uses the Internet and the Web interplanetary must be sufficiently robust to address the delays and loss of connection in space, adds the release.

Problems can occur when a spacecraft passes behind a planet and contact is interrupted or when the communications were affected by solar storms.

The delay to receive or send data to Mars, for example, can be between 3.5 and 20 minutes at the speed of light.

However, unlike the system of Internet, there is the possibility of disconnection.

In its design, if you can not find a recipient, JPL what qualifies as a "node", the information is not discarded and stays until he is found.

"This network interplanetary initial ten nodules," said Scott Burleigh, the JPL engineer.

"One is Epoxy and the other nine are at JPL represent the vehicles on Mars, the satellites and control centers of operations in Earth," he said.

To explain the system, the JPL used an analogy with the basketball and said that acts as the player who passes the ball to the partner that is closer to the basket. "Ultimately, the information will be delivered to the user," he said.

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