1 / 8

Review of developments in Australasia and mainland Asia

Review of developments in Australasia and mainland Asia. Steven Tingay Swinburne University of Technology Next Generation correlator meeting, JIVE 27 - 29 June, 2006. http://astronomy.swin.edu.au. Current correlator developments in Australasia CABB (Ferris: Day 1)

kyna
Download Presentation

Review of developments in Australasia and mainland Asia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Review of developments in Australasia and mainland Asia Steven Tingay Swinburne University of Technology Next Generation correlator meeting, JIVE 27 - 29 June, 2006 http://astronomy.swin.edu.au

  2. Current correlator developments in Australasia • CABB (Ferris: Day 1) • SKAMP (Bunton: Day 3; de Souza: Day 3) • NTD/xNTD (Bunton: Day 3) - Langman: Day 3 • LFD (Bunton: Day 3) • VLBI/eVLBI (Deller: Day 2) • Current correlator developments in mainland Asia • PAST • FAST • VLBI/CE-1 (Zhang: Day 1; Weimin: Day 2) • GMRT (Gupta: Day 1) Horses for courses………

  3. Compact Array Broadband Backend (CABB) • First major upgrade to ATCA correlator since construction • in 1988 (CABB funded under MNRF2001) • Current ATCA correlator: • 6 antenna inputs; • 2 dual polarisation (linear) IFs (∆MAX = 128 MHz); • XF; • max number of channels = 4096; • ASIC-based. • CABB: • 8 inputs (2 extra for VLBI or RFI mitigation); • 2 dual polarisation (linear) IFs (∆MAX = 2 GHz); • polyphase digital filter bank for channelisation, • then cross-multiply; • max number of channels = 2000 (initially); • FPGA-based. • Phased introduction of operational system over next 2 Years • Dick Ferris to present details (http://www.atnf.csiro.au/projects/mnrf2001)/

  4. SKA Molonglo Prototype (SKAMP) www.physics.usyd.edu.au/astrop/ska/ (John Bunton/Ludi de Souza) • 96 stations (feeds), digital filterbank FX, FPGA-based;; • Stage 1: continuum, ∆ = 3 MHz @ 843 MHz; • Stage 2: 2048 channel spectral line, ∆ = 30 MHz @ 843 MHz; • Final: 2048 channel spectral line, ∆ = 100 MHz @300 - 1400 MHz (Extended) New Technology Demonstrator (NTD/xNTD) www.atnf.csiro.au/projects/ska/xntd.html (John Bunton) • 20 x 15m dishes, FPA with >30 beams; • 22800 baseline/polarisation products, ∆ = 256 MHz ; • Spectral-line, FPGA-based (same correlator board as SKAMP??); • Very similar instrument to KAT (Alan Langman); • Located at Mileura station in Western Australia. Low Frequency Demonstrator (LFD) www.haystack.mit.edu/ast/arrays/mwa/LFD/index.html (John Bunton) • 500 tile array with full stokes, ∆ = 32 MHz , 4000 channels; • Common correlation engine with SKAMP and NTD/xNTD; • CSIRO/MIT/University joint project;

  5. DiFX software correlator • astronomy.swin.edu.au/ska (Adam Deller) • www.atnf.csiro.au/vlbi/documentation/VLBI_National_Facility_upgrade.html • Complements new high data rate disk-based recording system • 300 processor Beowulf cluster/Cray XD-1/Cray XT-3; • FX correlator (filter bank option); • Services Australian and global VLBI arrays; • Six antennas up to 1 Gbps (∆ <= 128 MHz); • Currently offered as part of ATNF (high sensitivity, • high spectral resolution, niche experiments); • Will replace ATNF S2 correlator (<128 Mbps and <4096 • channels) within 12 months; • Natural compatibility with all other disk-based • recorders (Mark5, K5, PC-EVN etc); • Used for eVLBI tests and real-time fringe checking; • Promotes collaboration in non-traditional but important • areas.

  6. Primeval Structure Telescope (PAST) web.phys.cmu.edu/~past/overview.html Observe the epoch of reionisation at redshift 6 - 20; 80 phased arrays x 127 antennas per phased array; 10,000 log periodic antennas in the Ulastai Valley, China; Software correlator using ~100 COTS PCs. Five hundred metre Aperture Spherical Telescope (FAST) Multi-beam receivers for surveys; Wide bandwidth, full polarisation; VLBI spacecraft tracking/Chang’E-1 Lunar mission Real-time software correlator (Zheng Weimin, Xiuzhong Zhang) Determination of lunar orbiter position, lunar gravity field; Correlation in software a la Huygens VLBI experiments; Real-time correlation with COTS PC cluster.

  7. Giant Metrewave Radio Telescope (GMRT) (Yashwant Gupta) • 30 x 45m antennas, 150 - 1420 MHz; • Bandwidth upgrade from 32 MHz to 400 MHz; • Upgrade of current 30 antenna, 256 channel, FX correlator required -> 32 antenna, 8192 channel; • Enhanced beamforming capabilities for multi-beam pulsar searching; • Software vs hardware ???

  8. Summary • A lot of diverse activity across the region. • Large and small developments, upgrades (e.g. CABB, SKAMP, GMRT) and new facilities (e.g. xNTD, FAST, LFD); • SKA demonstrators (CABB, SKAMP, xNTD, LFD, FAST); • Niche facilities (Software correlators for VLBI); • Specialised experiments (PAST); • Other small developments (e.g. Uni.Tas. FPGA developments) • Other planned/proposed developments (e.g. Australian geodetic VLBI array using software correlator.)

More Related