1 / 17

SKAMP Square Kilometre Array Molonglo Prototype

SKAMP Square Kilometre Array Molonglo Prototype. Supporting Institutions. University of Sydney Argus Technologies ATNF ICT Centre. Bevan Jones Andrew Parfitt John Kot Peter Liversidge Daniel Mitchell Adrian Blake. Anne Green Duncan Campbell-Wilson John Bunton Mike Kesteven

bartonj
Download Presentation

SKAMP Square Kilometre Array Molonglo Prototype

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. SKAMPSquare Kilometre Array Molonglo Prototype

  2. Supporting Institutions • University of Sydney • Argus Technologies • ATNF • ICT Centre

  3. Bevan Jones Andrew Parfitt John Kot Peter Liversidge Daniel Mitchell Adrian Blake Anne Green Duncan Campbell-Wilson John Bunton Mike Kesteven Tim Adams Martin Leung Sergey Vinagradov SKAMP Team School of Physics, University of Sydney Argus Technologies, Sydney ICT Centre, CSIRO Australia Telescope National Facility, CSIRO

  4. SKAMP Specifications Collecting area = 1% of SKA (i.e. equivalent to 1 SKA station) • Multibeaming • Wide instantaneous field of view • Digital beamforming • Wide-band FX correlator (2048 channels) • Frequency and pointing agility • Line feed 0.3-1.4 GHz >100 MHz instant BW • Cylindrical antenna prototype • RFI mitigation strategies - adaptive noise cancellation

  5. SKAMP Project • Stage I: Continuum Operation • New IF Samplers • Digital delay lines • Fringe tracking • Continuum correlator (96 station; 4 MHz) • Stage II: Spectral Line Operation • New LO • New IF distribution • 2048 channel polyphase filter/antenna; • Spectral line cross-correlator engine (50 MHz BW) • Stage III: Wide Band Operation • Wide band feed (300-1400 MHz) • RF beamformers distributed along the cylinder • New front-end • Digital beamformer + increased correlator BW

  6. A x B SKAMP Development Groups • Antenna/Linefeed • Data Acquisition & Beamforming • Correlator • Signal Processing

  7. A x B Antenna/Linefeed Progress • Initial prototyping and simulation has begun for possible linefeed designs • Currently being investigated is a wideband dipole antenna element • A three element array has been constructed and tested • Several multi element arrays have been simulated

  8. Prototype antenna design

  9. Simulation: Normalised Amplitude • Eight Element Array • Optimal choice of spacing • High polarisation purity (-24 dB) • Low level of sidelobes

  10. Simulation: X-Polar Pattern • Eight Element Array • Optimal choice of spacing • High polarisation purity (-24 dB) • Low level of sidelobes

  11. A x B Data Acquisition & Beam-forming Progress • 100 x ADC boards manufactured & ready to install • Digital delay & phase-tracking board currently being manufactured • First fringes obtained • Stage II – samplers, IF signal transport and beamformers in design

  12. ADC Production & Testing

  13. First Fringes

  14. A x B Correlator Progress • Correlator design complete & PCB is current being manufactured/populated • Testing & debugging will commence early July • Lab for testing established at USYD • Stage II – spectral line correlator design being revised; several options for polyphase filterbank

  15. A x B Signal Processing Progress • SKAMP I interface built and installed • Controlled acquisition of telescope parameters, wide field position and visibilities every second • From ephemeris package, computed delay, phase and phase rates. Also calculation of telescope tilt and meridian distance. • Distribution of information to delay and phase control units • Imminent completion of data visibility formatting and archiving

  16. Summary • Stage I: • Commissioning August – December 2004 • Stage II: • Update design matrix • Stage III: • Commissioning eight element prototype • Simulation of centre fed finite cylinder

More Related