Radio Astronomy VLBI Data Transmission "Proof of Concept Demonstrations"

Demonstrations at iGrid2002 and European Research 2002 provided the opportunity to demonstrate moving Radio Astronomy Very Long Baseline Interferometer data from Jodrell Bank Manchester in the UK to Amsterdam and the correlator at JIVE, Dwingeloo in the Netherlands. Data rates of 500 Mbit/s were consistently achieved.

Streams of carefully spaced UDP/IP packets were sent between SuperMicro server PCs connected with Gigabit Ethernet to the production networks in Europe. From Manchester, the data crossed SuperJANET4, the UK academic network, which is connected to SURFnet, the academinc network in the Netherlands, by GÉANT. The GÉANT network is operated by Dante and connects the National Research Networks in Europe.

Lots of people helped make the demonstrations a success.



Background information, Screenshots and Technical data are included from the Radio Astronomy VLBI Data Transport Demonstration, held at the iGrid Conference in Amsterdam, September 24-26, 2002. During iGrid2002, the link to the correlator at Dwingeloo became operational, and we believe that this was the first time that VLBI data has been successfully recorded at Radio Telescopes in different countries and transferred over the production internet to the correlator.


From 11 to 13 November 2002 the European Commission held a major conference to mark the launch of the EU's Sixth Framework Programme for research

Here the EU DataGrid and GÉANT projects demonstrated their collaborative work at the European Research 2002 Exhibition by demonstrating the transfer of Radio Astronomy VLBI data at 500 Mbits/s and the use of different Quality of Service traffic at 2.5Gbit/s as well as job submission to the EU DataGrid.


Richard Hughes-Jones 20 Nov 02