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
-
- 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.
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