From: <Chris.Phillips_at_email.protected>
Date: Wed, 15 Aug 2007 23:58:15 +1000 (EST)

Hi all,

A message sent to "evntech" which I thought you would all be interested
in...

---------- Forwarded message ----------
Date: Wed, 15 Aug 2007 15:32:28 +0200 (CEST)
From: Arpad Szomoru <szomoru_at_jive.<!--nospam-->nl>
To: evntech_at_jb.<!--nospam-->man.ac.uk, EVN-NREN_at_SEGATE.<!--nospam-->SUNET.SE
Subject: EVNtech: eVLBI fringes from down under

Hi all. Last night we obtained the first fringes between two Australian
telescopes, correlated in real-time on the EVN MarkIV correlator at JIVE
(see attached plot). The telescopes involved were Mopra and ATCA (single
dish), while Parkes participated for part of the run with dummy data. Data
rates were 128 and 256 Mbps, the transport protocol used was a locally
made version of Circuit TCP (basically TCP without congestion control).
The data were converted at the stations on-the-fly to Mark5B format and
played back on Mark5A+ units at JIVE

Currently one 1G lightpath between ATNF and JIVE is available. Data from
Mopra was sent via this lightpath, while the data from ATCA was sent over
the normal routed research networks. Also on the routed network 256 Mbps
was easily sustained, and CTCP dealt very adequately with the occasional
packet losses.

The interface between the EVN correlator control software and the LBADR
units and the data conversion program were written by Chris Phillips, who
also helped debug Ciruit TCP. Mark Kettenis implemented Circuit TCP,
adapted the control system for A+ and helped with debugging the data
conversion. Paul Boven and Shaun Amy took care of the many networking
issues at JIVE and ATNF. And of course we could not have done this without
the support of our friends at the NRENs, AARNET, SURFNet and CANARIE.

Regards, Arpad

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

   Arpad Szomoru, Head Data Processor Research and Development, JIVE

   Joint Institute for VLBI in Europe tel. +31521596509/596500
   PO Box 2 mob. +31650502091
   7990 AA Dwingeloo fax +31521597332
   The Netherlands szomoru_at_jive.<!--nospam-->nl

   ----------------------------------------------------------------------
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Received on 2007-08-15 23:58:38