EVLBI MPIfR,Bonn A. Roy, W. Alef, D. Graham, A. Oberreuter

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Presentation transcript:

EVLBI STATUS @ MPIfR,Bonn A. Roy, W. Alef, D. Graham, A. Oberreuter 100m-telescope at Effelsberg MK IV correlator at Bonn Lofar station at Effelsberg (December 2006) Participate in EVN eVLBI efforts EU sponsored EXPReS project Geodetic eVLBI efforts with Haystack (near-realtime data transfer to the correlator) Lofar realtime data transfer at ~2.5 Gbit

Lofar Overview Das Projekt LOFAR und seine technischen Anforderungen MPIfR + EFF

Present networking status 100 Mbit to Internet ~1 Gbit to Géant via 10 Gbit testbed VIOLA (only for eVLBI) 2 Mbit from institute to Effelsberg

MPIfR in the EVN eVLBI landscape Das Projekt eVLBI und seine technischen Anforderungen MPIfR + EFF

Future networking status Own fibre between Effelsberg and institute Accepted project by MPG Cost about 1.5 M€ Ready 1st half of 2007 Digging should start end of 2006 Initially 2x 10 Gbit (Lofar & eVLBI), 2x 1 Gbit Own fibre between institute and DFN POP Accepted by MPG, cost 0.5 M€ Leased line to Dwingeloo/Groningen @ 10 Gbit (~100k€/y) A few p2p connections @ 1 Gbit Possibly become node of German Grid (DGRID)

Effelsberg to MPIfR to POP Streckenpläne EFF- BN

MPIfR in city of Bonn: possible routes Streckenpläne BN-Innenstadt Bonner MPIs

P2P from MPIfR – BIR – MUE – Surfnet Das aktuelle DFN-Netzwerk und Übergänge in Nachbar-NRENs

Present activities Testing Mark 5Bs with high-end server boards (2x 1Gbit ethernet on board) Network tests and VLBI data transfers with server (5 TB, 2x 1Gbit ethernet) but: problems with Mark 5 software and new Linux kernels (2.6.16) Extend correlator to 12 stations and switch to Linux, full eVLBI connectivity (collaboration with Haystack) Upgrade Mark 5s with new server mobos (2x 1Gbit) Install software correlator (Deller, Swinburn) on cluster for evaluation against MK IV correlator & for „German Lofar“ With Haystack: 4 Gbit/s recording @ 1mm wavelength on Pico Veleta (Spain)