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"Toward the Era of Optical Communication in Space"



 
 
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Old December 9th 05, 04:24 PM posted to sci.space.news
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Default "Toward the Era of Optical Communication in Space"

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*** JAXA MAIL SERVICE ***
Japan Aerospace Exploration Agency
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"Toward the Era of Optical Communication in Space"
Success of the Optical Inter-orbit Communication Experiment
between
the Optical Inter-orbit Communications Engineering
Test Satellite "Kirari" (OICETS) and
the Advanced Relay and Technology Mission (ARTEMIS)

December 9, 2005
Japan Aerospace Exploration Agency

On December 9, 2005 (Japan Standard Time, JST), the Japan Aerospace
Exploration Agency (JAXA) and the European Space Agency (ESA)
succeeded in a bidirectional optical inter-orbit communication
experiment using a laser beam between the Optical Inter-orbit
Communications Engineering Test Satellite "Kirari" (OICETS) and
the Advanced Relay and Technology Mission (ARTEMIS) of the ESA.

This is the first bidirectional optical inter-orbit communication in
the world.

The success of this experiment has made it possible for us to acquire
enabling technology mainly for on-orbit laser beam acquisition and
tracking technology. Also it enables us to collect data for improving
transmission speed and volume, and for making onboard communication
equipment smaller and lighter, which are essential for a future data
relay satellite. In addition, we were able to obtain technology for
future international mutual operations through international
cooperation with ESA.

Optical inter-orbit communication is a method for satellites that are
moving several kilometers per second in respective orbits to transmit
and receive laser beams. The distance between them can be as far as
about 40,000 kilometers. This inter-orbit communication using laser
beams is a highly advanced technology that can be described like
"hitting the eye of a needle placed on top of the Mt. Fuji from
Tokyo Station." This communication method has a lot of advantages.
For example, communication can be more stable because, unlike radio
waves, laser beams do not cause interference. Also, onboard equipment
can be smaller and lighter, but transmission speed is higher, and
large volume data can be smoothly exchanged.

Kirari's optical inter-orbit communication technology is expected to
be an essential technology for supporting various future space
activities including global data acquisition by an earth observation
satellite as a communication method between a low earth orbit
satellite and a data relay satellite in geostationary orbit. We will
continue to verify enabling technologies and to carry out functional
verification in the space environment.

We would like to express our appreciation to the ESA, which operates
the ARTEMIS, for its cooperation with the experiment.

[Kirari (OICETS) Video (Sorry, Japanese only)]
http://www.jaxa.jp/missions/projects...s/index_e.html



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Publisher : Public Affairs Department
Japan Aerospace Exploration Agency (JAXA)
Marunouchi Kitaguchi Building,
1-6-5, Marunouchi, Chiyoda-ku, Tokyo 100-8260
Japan
TEL:+81-3-6266-6400


--
--------------

Jacques :-)

www.spacepatches.info


 




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