From: <stuart.weston_at_email.protected>
Date: Sun, 7 Apr 2013 08:59:05 +0000

RCP
                    bbc01=288 (1380 + 288 = 1668) This will be USB from 1668 to 1684
                    bbc02=272 (1380 + 272 = 1652) This will be LSB from 1652 to 1668

LCP

                    Repeat for bbc05 and bbc06 ??

Mk5 mode: 0x00000f0f

We are not sure but the LSB may be spectrally inverted, we think this is what we would get if we recorded the LSB produced by the DBBC.

Can't find my uid/pwd for the lba wiki to add into the satation notes.

I am operating this from home.

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: Tim Natusch
Sent: 07 April 2013 20:46
To: Stuart Weston
Subject: RE: Schedules for re03qr, re03qs, re03qt observations with RadioAstron (7-9 April)

OK lets try that.

But should be bbc01=288 (1380 + 288 = 1668) This will be USB from 1668 to 1684
                    bbc02=272 (1380 + 272 = 1652) This will be LSB from 1652 to 1668

And I guess the same for bbc05 and bbc06 ??

There is one more point I worry about, should the LSB be spectrally inverted, I think this is what we would get if we recorded the LSB produced by the DBBC.

However, as you point out the MK5 will not accept the wacky mode my scheme produces, so we have to do something else!
Tim
________________________________
From: Stuart Weston
Sent: Sunday, 7 April 2013 8:40 p.m.
To: Tim Natusch
Subject: RE: Schedules for re03qr, re03qs, re03qt observations with RadioAstron (7-9 April)

The mk5 mode you suggest doesn't work !

I am all for simplicity. Why not stick with geo ?

bbc01=280
bbc02=304

bbc05=280
bbc06=304

then mode is 00000f0f

The mk5 only likes 5 or f.

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: Tim Natusch
Sent: 07 April 2013 20:36
To: Stuart Weston
Subject: RE: Schedules for re03qr, re03qs, re03qt observations with RadioAstron (7-9 April)

Hi Stuart,
              further to the point re generating USB and LSB spectra. As we have not used the LSB spectra produced by the DBBC before I stand to be corrected on the following, but this is how I currently see things;

If we set CH1 (say) to a freq of 288 MHz (1668 MHz on the sky) and bandwidth of 16 MHz then the DBBC will naturally produce a spectrum from 288 - 304 MHz (1668 - 1684 MHz on the sky) and this data will appear on VSI bits 0 and 1. At the same time (with out any extra work on our part) it also creates the lower sideband of this channel 272 - 288 MHz (1652 - 1668 MHz on the the sky) and puts these out on VSI bits 17 and 18, if we are in ASTRO mode. So these would be our two RCP channels.

Similar arguments for CH5 .

I have to say I am not 1000% certain as have not actually tested this.

Guess we will see in the fringe test.

Cheers,
           Tim
________________________________
From: Tim Natusch
Sent: Sunday, 7 April 2013 8:20 p.m.
To: Stuart Weston
Subject: RE: Schedules for re03qr, re03qs, re03qt observations with RadioAstron (7-9 April)

Hi Stuart,
               since RCP is connected to IFA and LCP to IFB I thought we would use ASTRO mode, looking at the mapping it then puts CH1 USB bits out on VSI bits 0 and 1, CH1 LSB bits out on VSI bits 17 and 18. Similarly CH5 would be our LCP and ASTRO mode has CH5 USB appearing on VSI bits 9 and 10, CH5 LSB on VSI bits 25 and 26. I think this makes the mode 0x03030303 ?? Maybe I am not loking at this properly but I don't see how we will get out the required USB and LSB spectra if we use CHs 1,2,5,6 ??

Cheers,
           Tim
________________________________
From: Stuart Weston
Sent: Sunday, 7 April 2013 7:57 p.m.
To: Tim Natusch
Subject: RE: Schedules for re03qr, re03qs, re03qt observations with RadioAstron (7-9 April)

Should be, just changing the ".prc" files to setup the dbbc correctly. I'll test them shortly.

As we are using chls 1,2 (rcp) and 5,6 (lcp) we need mode mk5_mode 00000f0f

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: Tim Natusch
Sent: 07 April 2013 19:04
To: Stuart Weston
Subject: FW: Schedules for re03qr, re03qs, re03qt observations with RadioAstron (7-9 April)

Hi Stuart,
              are you OK for 10 pm start of vc199a fringe check?

Tim
________________________________
From: owner-vlbiobs_at_atnf.<!--nospam-->csiro.au [owner-vlbiobs_at_atnf.<!--nospam-->csiro.au] on behalf of Hayley Bignall [h.bignall_at_curtin.<!--nospam-->edu.au]
Sent: Sunday, 7 April 2013 6:53 p.m.
To: VLBI observers
Cc: Yuri Y. Kovalev
Subject: Re: Schedules for re03qr, re03qs, re03qt observations with RadioAstron (7-9 April)

Dear all,

The schedule for re03qt (and fringe test vc201a) for 9 April has been updated (to version 1.1) to add Ceduna which is now available on Tuesday night at L-band.

No other changes have been made apart from adding Ceduna, so there should be no need for the other stations to re-run anything.

Cheers,

Hayley

On 5 April 2013 14:58, Hayley Bignall <h.bignall_at_curtin.<!--nospam-->edu.au<mailto:h.bignall_at_curtin.<!--nospam-->edu.au>> wrote:
Further to my message below, fringe test schedules are now also in place, as per
http://www.atnf.csiro.au/vlbi/wiki/index.php?n=Main.LBAApr2013

'a' suffix was used for L-band fringe checks, 'b' for C-band fringe checks. (ATCA is scheduled in both.)

I also ran the scripts "vex2atnf" (which does things for ATCA and ASKAP in this case) and "copysched" for all schedules - which transfers all the schedules to most stations (sorry for the stations that had already done this themselves.)

Cheers,

Hayley

On 5 April 2013 12:07, Hayley Bignall <h.bignall_at_curtin.<!--nospam-->edu.au<mailto:h.bignall_at_curtin.<!--nospam-->edu.au>> wrote:
Dear all,

Final schedules for the upcoming observations are now available on:

ftp://ftp.atnf.csiro.au/pub/people/vlbi/re03/

under the following directories:
re03qr (for 7 April from 11-20 UT)
re03qs (for 8 April from 12-20 UT)
re03qt (for 9 April from 15-16:05 UT).

Fringe tests will be scheduled for the hour before each observation. I will send another message when the fringe test schedules are ready.

Stations assumed to be participating are:

L-band: Ceduna (for re03qs on 8 April only), ATCA, Warkworth, ASKAP.

C-band: ATCA, Hobart, Hart (from 18:50-20:00 UT on 7 and 8 April, and the earlier fringe tests on those days.)

The wiki pages are still to be put in place (they will be linked under http://www.atnf.csiro.au/vlbi/wiki/index.php?n=Main.LBAApr2013 )

Cheers,
Hayley
Received on 2013-04-07 19:01:28