Dept of Astrophysics
University of NSW
Sydney
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Technical Information

Detailed technical information on the Mopra antenna can be found in this document from the ATNF. A brief summary focusing on the 3mm system is provided here for your convenience.

General Information

  • Dish Diameter: 22m.
  • Elevation 850m above sea-level.
  • Position switching mode available only.
  • Receivers: 3 and 12mm, 3, 6, 13 and 20cm.
  • Doppler tracking supported with 3mm system. Other systems support doppler tracking by arrangement in the schedule file.
  • Tsys calibration is obtained through the chopper wheel method.
  • Raw pointing is accurate to 15", decreasing to <8" if more frequent pointing runs are done (every 30 min).
  • Data is output from the correlator as an RPFITS file.
  • DVD and FTP are available to transport data offsite.

Avaliable in 2006

3mm MMIC Receiver and MOPS (Mopra Spectrometer)

MOPS has been tested between 74 - 118 GHz frequency range. Observing frequency outside this range do not generate errors, however it is not clear what will happen.

The system provides two observing modes:
  • broadband mode, and
  • narrowband mode.

Broadband mode
  • 8 GHz bandwidth
    • divided into four 2 GHz (2 pol) windows
  • Two different configurations
    • 1024 channels per window corresponding to a channel spacing of 2.2 MHz,
    • 8192 channels per window providing a channel spacing of 0.27 MHz.
Narrowband mode
  • 8 GHz bandwidth
    • divided into four 2 GHz (2 pol) sub-bands
    • can choose up to 4 windows in each sub-band
    • each window is 138 MHz wide and has 4096 channels
  • New interleave mode
    • The new interleave mode is now avaliable. This configuration eliminates the possibility of a line falling onto the edge of a window.

For more information see here.

Page created by Cormac Purcell and maintained by Nadia Lo. If you have any comments and suggestions, please direct your email to nlo@phys.unsw.edu.au.