From: <Simon.Ellingsen_at_email.protected>
Date: Fri, 26 Aug 2011 22:15:48 +1000

Hi Steven,

>* Can someone tell me what we should expect for the switched noise
>source at Hobart, Ceduna and Tidbinbilla (timescales, Tcal values,
>percentage of Tsys etc)? I think I recall that the noise sources are
>only fired infrequently and may be controlled by the field system
>schedule. Can someone describe what happens at these telescopes?
>Does a short timescale ALC operate?

For Hobart and Ceduna there is no short timescale continuous ALC.
The system temperature is measured whenever the appropriate command
is issued by the PCFS. These days normally this is done as part of the
preob procedure which runs every time there is a source change (which seems
to give sufficient tsys measurements for most observations). The values
are automatically extracted from the PCFS log files, converted into antab format
(usually scaled accurately into Jy) and uploaded to the ATNF FTP site.
The probably could/should be linked from the wiki as the system temperature
information is for the ATNF antennas, but at the moment you have to go to the
FTP site to get them.

>
>* I gather there are no switched noise sources and/or ALC in the ASKAP
>or Warkworth systems?
>
>* Do the AuScope systems have switched noise sources and/or ALC? If
>so, could someone describe them, please?
>
>Cheers, Steven
>
>--
>* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>Professor Steven Tingay
>Director, CIRA
>Western Australia Premier's Fellow
>
>Street address:
>Brodie Hall building
>1 Turner Ave
>Technology Park
>Bentley 6102
>Western Australia
>
>Email: s.tingay_at_curtin.<!--nospam-->edu.au OR Steven.Tingay_at_icrar.<!--nospam-->org
>
>WWW: http://astronomy.curtin.edu.au OR http://www.icrar.org
>
>Phone: +61 (0)8 9266 3516
>
>Mobile: +61 (0)425 771 856

Regards

Simon

--
Simon Ellingsen : Associate Professor Physics & Astronomy, University of Tasmania
email : Simon.Ellingsen_at_utas.<!--nospam-->edu.au
WWW   : http://fcms.its.utas.edu.au/scieng/physics/pagedetails.asp?lpersonId=681
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Received on 2011-08-26 22:16:18