Re: Request for information
- Contemporary messages sorted: [ by date ] [ by thread ] [ by subject ] [ by author ] [ by messages with attachments ]
From: <Steven.Tingay_at_email.protected>
Date: Fri, 26 Aug 2011 20:47:05 +0800
Thanks Simon.
So, from the PCFS schedule, could we extract the times at which the
noise cal is fired?
On Fri, Aug 26, 2011 at 8:15 PM, Simon Ellingsen
<Simon.Ellingsen_at_utas.<!--nospam-->edu.au> wrote:
>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
>Phone : 6226 7588 ; Area Code : +61 3 (International)
> 6226 2410 (Fax) 03 (Australia)
>
>
>
>
>
>
Date: Fri, 26 Aug 2011 20:47:05 +0800
Thanks Simon.
So, from the PCFS schedule, could we extract the times at which the
noise cal is fired?
On Fri, Aug 26, 2011 at 8:15 PM, Simon Ellingsen
<Simon.Ellingsen_at_utas.<!--nospam-->edu.au> wrote:
>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
>Phone : 6226 7588 ; Area Code : +61 3 (International)
> 6226 2410 (Fax) 03 (Australia)
>
>
>
>
>
>
-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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 856Received on 2011-08-26 22:47:31