RE: Radio Astron VLBI

From: <stuart.weston_at_email.protected>
Date: Mon, 8 Apr 2013 23:10:43 +0000

I have this morning sent test tones.

I see peaks in bands where I expect.

Tone: 1660GHz, I see in Chls 2 & 4 in centre of band
Tone: 1676GHz, I see in Chls 1 & 3 in centre of band

There appears to be some leakage integrating for ~10s:

For 1660 I see a small peak in Chl 1
For 1676 I see a v.small peak in Chl 2

I have a tone of ~8db. Drop the tone to 5db and no leakage/peak in other bands as above for 10s integration.

Stuart Weston

Mobile: 021 713062
Skype: stuart.d.weston
Email: stuart.weston_at_aut.<!--nospam-->ac.nz<mailto:stuart.weston_at_aut.<!--nospam-->ac.nz>
http://www.atnf.csiro.au/people/Stuart.Weston/index.html

Software Engineer
Institute for Radio Astronomy & Space Research (IRASR)
School of Computing & Mathematical Sciences
Faculty of Creative Technologies
Auckland University of Technology, New Zealand.
http://www.irasr.aut.ac.nz/
________________________________
From: Hayley Bignall [hbignall_at_gmail.<!--nospam-->com]
Sent: 08 April 2013 19:40
To: Dr Michael Bietenholz
Cc: Chris Phillips; VLBI observers; Jamie McCallum; Stuart Weston; Tim Natusch
Subject: Re: Radio Astron VLBI

Hi guys,

It occurred to me that I could have added a file grab for fringe check to the main schedule as well.. I haven't done this but possibly could still do it for Hart tonight. Especially as Hart has one (ten minute) scan with ATCA and Hobart at 18:50, then a long gap before the spacecraft segment at 19:20 UT.

Anyway let's see how the fringe test goes I guess..

Cheers,

Hayley

On 8 April 2013 15:12, Dr Michael Bietenholz <michael_at_hartrao.<!--nospam-->ac.za<mailto:michael_at_hartrao.<!--nospam-->ac.za>> wrote:
Hi Chris

Sorry gusy, I may have screwed up the fringe check at Hart - I
mistakenly loaded the main schedule (rather than the fringe-check one),
and then noticed that nothing was happening for 6 hours
so I figured it out and loaded the fringe-check schedule. However,
I realize now that I never loaded the fringe check *proc* file,
so the Hart setup may have been wrong.

I did load the right procedure & schedule for the actual run later
on yesterday.

                   michael

>On 8 April 2013 12:23, <Chris.Phillips_at_csiro.<!--nospam-->au> wrote:
>
>>Hi Guys
>>
>>I have looked more at last nights data - I still cannot get fringes to
>>Ww,Hobart,Hart or ATCA at C-band. Either the setup is not what I expect
>>or
>>something is seriously wrong at lots ok the observatories.
>>
>>For those you can please before the fringe test tonight try turning on a
>>test tone and record some data and verify it appears where you expect.
>>Best
>>to try a tone at a few difference frequencies at different locations
>>within
>>the bands.
>>
>>Also check formatter time offsets etc.
>>
>>Cheers
>>Chris
>>
>>
>
Received on 2013-04-09 09:16:31