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Collaborative Research Projects in Australia: Radio Astronomy

Collaborative Research Projects in Australia: Radio Astronomy. Dr. Greg Wickham (AARNet) Dr Tasso Tzioumis Dr Shaun Amy Dr Chris Phillips (CSIRO ATNF). Global Collaborations / APAN 28 th August 2007. Radio Interferometry. Telescopes focus on a source

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Collaborative Research Projects in Australia: Radio Astronomy

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  1. Collaborative Research Projects in Australia:Radio Astronomy Dr. Greg Wickham (AARNet) Dr Tasso Tzioumis Dr Shaun Amy Dr Chris Phillips (CSIRO ATNF) Global Collaborations / APAN 28th August 2007

  2. Radio Interferometry • Telescopes focus on a source • Closest telescope has delay introduced • Data streams fed into correlator • Fringes are calculated: • Provides information on structure and position of radio source • Telescopes focused at different sources – no fringes

  3. Building an Image • Telescopes maintain focus on source for a period of time • As the earth rotates more data is collected • Data fed into correlator • Similar in concept to “time lapse photograph” • Final image is interpolated

  4. Visibility of Sources  

  5. eVLBI Strategy • Now • 1024 Mbps/telescope - 2 x 1Gbps • N x 1Gbps to correlators: Swinburne / Curtin --> 10 Gbps circuits? • International: JIVE (n x 1 Gbps); USA; Asia • 3 years: • CABB correlator at Narrabri • Min: 2 x 10 Gbps (8Gbps) / telescope • N x 10 Gbps into Narrabri

  6. eVLBI Strategy • 5 years: • ASKAP • N x 10 Gbps per telescope to Correlators • New NSW site (Fowler’s Gap) • Connections to and in WA & NZ • 10 years: • SKA • Candidates are Australia and South Africa • Extreme bandwidth required (up to Tbps)

  7. eVLBI – Strategy in Motion • Huygens Transfer • VLBI • EXPReS • milestone in the progress towards SKA. • International collaborations are extremely important • Strategic to be involved • In Australia • eVLBI is ~ 10% of the ATNF observations • How is this going to evolve is not clear yet • And as ASKAP and the SKA come along, there will be bigger sectors of the community involved

  8. VLBI - Huygens Space Probe

  9. EXPReS • Data Path: • Telescopes to Marsfield • Marsfield to AARNet • AARNet to Jive • Trial: • June • 3 x 256Mbit/sec streams • Using routed network • Full Test: • October • 3 x 512Mbit/sec streams • Using circuits Parkes

  10. EXPReS: Trial • 3 x 256 Mbit / sec • Combined at Marsfield • Temporary 1G connectionto AARNet • Routed connection back toJIVE • “Relatively Simple”

  11. 3 x 512Mbit/sec Direct patched in Sydney Not to Scale! Final Experiment

  12. Square Kilometer Array

  13. Thank You!

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