WesterborkNetherlands

Dedicated

Gbit link

OnsalaSweden

Gbit link

Jodrell BankUK

DwingelooDWDM linkCambridge

UK

MERLIN

MedicinaItaly

Chalmers University

of Technolog

y, Gothenbur

g

TorunPoland

Gbit link

3rd EVN-NREN MeetingSteve Parsley, JIVE,

parsley@jive.nl

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Outline

• Proof of Concept Project – Review of Progress• Timeline• Milestones• Connection status

• Next six months• FP6 IST proposal

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Project Timeline

You are

here

Low data rate astronomyTransatlantic real-time fringes

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

eVLBI Milestones (since 2nd EVN-NREN Meeting)• January 2004: Disk buffered eVLBI session:

• Three telescopes at 128Mb/s for first eVLBI image• On – Wb fringes at 256Mb/s

• April 2004: Three-telescope, real-time eVLBI session.• Fringes at 64Mb/s• First real-time EVN image - 32Mb/s.

• September 2004: Four telescope real-time eVLBI• Fringes to Torun and Arecibo• First EVN, eVLBI Science session

• January 2005: First “dedicated light-path” eVLBI• ??Gbyte of data from Huygens descent transferred

from Australia to JIVE• Data rate ~450Mb/s

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

http://www.jive.nl/ist2004/

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Jodrell BankUK

OnsalaSweden

MedicinaItaly

TorunPoland

EffelsbergGermany

WesterborkNetherlands

Telescopes connections

JIVE

1Gb/s

1Gb/s

1Gb/s

155Mb/s

MERLINCambridgeUK

2.5Gb/s

1Gb/s

MERLINe

?????

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Outline

• Proof of Concept Project – Review of Progress• Timeline• Milestones• Connection status

• Next six months• FP6 IST proposal

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Next Six Months• Objectives

• Induction of Jodrell/Cambridge and Medicina when high speed links are ready.

• Expansion of the array to seven telescopes: Ar, Cm, Jb, Mc, On, Tr, Wb

• Higher data rates > PoC target of 512Mb/s.• Correlator/Mark5, eVLBI robustness issues.• eVLBI Logistics: FS and correlator-control

coordination for smooth operations.• Alternative protocol development and testing - viz.

work underway at Jodrell Bank and JIVE• Integration of Haystack e-VLBI products: VSI-E,

network monitoring tools.• Transatlantic eVLBI and dedicated light paths.

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Next Six Months• Dates for Scheduled e-VLBI tests and demos

• 10 Feb - (not Onsala)• 11 March - (science demo)• 24 March• 28 April • 26 May• 7th July (not Onsala)

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Science Demo – 11 March

• Cm, Jb,On, Wb, Tr, (Mc?)• Continuum source• 128Mb/s• First trial of “dynamic scheduling”:

• Test several sources for suitability• Observe brightest

….not possible with standard VLBI

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Outline

• Proof of Concept Project – Review of Progress• Timeline• Milestones• Connection status

• Next six months• FP6 IST proposal (see separate presentation)

3rd EVN-NRAN Meeting – Schiphol, Amsterdam – 28th January 2005

Thank you