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/ International News / 2007 / September 2007 / September 6, 2007 Astronomers link telescopes to create one spanning the globe |
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Astronomers have for the first time linked a CSIRO radio telescope Down Under to six telescopes, one in China and five in Europe, in real time, to effectively create one as big as the Earth to observe a distant galaxy called 3C273.
Sydney, Sept 6 : Astronomers have for the first time linked a CSIRO radio telescope Down Under to six telescopes, one in China and five in Europe, in real time, to effectively create one as big as the Earth to observe a distant galaxy called 3C273.
VLBI operations and development manager at CSIRO's Australia Telescope National Facility, Dr Tasso Tzioumis, said this was the first time that scientists had been able to instantaneously connect telescopes half a world apart, and demonstrate the power of high-speed global networks.
"It's a fantastic technical achievement, and a tribute to the ability of the network providers to work together," said Dr Tzioumis.
Dr Tzioumis said data from the telescopes was streamed around the world at a rate of 256 Mb per second - about ten times faster than the fastest broadband speeds available to Australian households - to a research centre in Europe, where it was processed with a special-purpose digital processor.
The results were then transmitted to Xi'an, China, where experts in advanced networking watched it live at the 24th APAN (Asia-Pacific Advanced Network) Meeting.
Dr Tzioumis said from Australia to Europe, the CSIRO data travelled on a dedicated 1 Gb per second link set up by the Australian, Canadian and Dutch national research and education networks, AARNet, CANARIE and SURFnet respectively.
"The more widely separated the telescopes, the more finely detailed the observations can be. The diameter of the Earth is 12750 km and the two most widely separated telescopes in our experiment were 12304 km apart, in a straight line," said Dr Tzioumis.
He further said that within Australia, the experiment used the 1 Gb per second networks that now connect CSIRO's NSW observatories to Sydney and beyond.
ANI
