[GMVAtech 81] Re: [astrovlbi] preliminary schedules for next GMVA run

[Cristina García Miró]

The aim of the test would be to record in piggyback mode with the DBBC3 during the GMVA fringe test, with same configuration as for the DBBC2, to compare results with both backends.

I recall the stations interested in such a test were at least: Onsala, Metsahovi, Effelsberg, and Yebes.

It will help tremendously to have feedback from Bonn correlator on the DBBC3 performance.

Hope it can be organised.

Many thanks,
Cristina 
 

----- Original Message -----
From: "Thomas Krichbaum" <tkrichbaum at mpifr-bonn.mpg.de>
To: "c garciamiro" <c.garciamiro at oan.es>, "Helge Rottmann" <rottmann at mpifr-bonn.mpg.de>
Cc: "Guang-Yao Zhao" <gyzhao at mpifr-bonn.mpg.de>, "gmvatech" <gmvatech at lists.mpifr-bonn.mpg.de>
Sent: Monday, 14 April, 2025 15:50:06
Subject: Re: [astrovlbi] preliminary schedules for next GMVA run

Dear Cristina,

thanks for your suggestion. It may be difficult to find a suitable time slot for this, since not
all European stations are technically ready for this. The actual time slots are already fixed. I am not sure
how flexible other stations would be.

We have to be a bit careful for recabling, so that the science portion of the GMVA run is not affected
by possible errors when switching back to 'normal' mode. So such a test could be performed best
at the end/after the GMVA run.

I guess we would need a little bit of preparation and discussion. IRAM and Effelsberg do not have a 3 frequency
capability. Which stations do you have in mind ? I also do not have a setup file for three frequencies.

kind regards, Thomas

On 14/04/2025 15:35, Cristina García Miró wrote:
> Dear Thomas and Helge,
> 
> During recent FPT group meeting I proposed to include a DBBC3 fringe test to support incoming tri-band observations during this GMVA session.
> 
> Many colleagues were interested, as Helge can recall.
> 
> Would it be possible to include such a test?
> 
> Many thanks,
> Cristina
> 
> ----- Original Message -----
> From: "Thomas Krichbaum" <tkrichbaum at MPIFR-BONN.MPG.DE>
> To: "Lista de distribución de correo para VLBI Astronómico" <astrovlbi at LIST.OAN.ES>
> Sent: Friday, 4 April, 2025 18:14:29
> Subject: [astrovlbi] preliminary schedules for next GMVA run
> 
> Dear colleagues,
> 
> for the next GMVA campaign (starting Apr. 24) almost final schedules are ready. Could you please take a look.
> We just learned that GBT may be not available on Apr. 24/25, discussion are ongoing. It is
> probably to late to change the schedules so we have to live with it.
> 
> The latest version of the Block schedule is available from the GMVA webpage:
> https://urldefense.com/v3/__https://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/__;!!D9dNQwwGXtA!UM3opzABvPspMz8AujYv_qWEtIQG0uHl1P3ylMVV6wxWN_X_9tH0mxCcsUCO046xLwna74uTLCJEzX0O1TsMCxcrDELe$
> --> Sessions -> Apr 24 - 28, 2025 -> Block Schedule
> 
> (or via this direct link: https://urldefense.com/v3/__https://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/sessions/apr25/MMschedule.asc__;!!D9dNQwwGXtA!UM3opzABvPspMz8AujYv_qWEtIQG0uHl1P3ylMVV6wxWN_X_9tH0mxCcsUCO046xLwna74uTLCJEzX0O1TsMC_rpZyaT$ )
> 
> I hope that there are no major issues.
> 
> We plan to distribute the final schedules before April 18, 2025.
> 
> Please fetch the schedules from here:
> 
> https://urldefense.com/v3/__ftp://ftp.mpifr-bonn.mpg.de/outgoing/p459kri/3mmapr25/sched__;!!D9dNQwwGXtA!UM3opzABvPspMz8AujYv_qWEtIQG0uHl1P3ylMVV6wxWN_X_9tH0mxCcsUCO046xLwna74uTLCJEzX0O1TsMCyGHghu6$
> 
> There are 6 portions:
> 
> c251a   7mm no IRAM
> f251a   3mm Fringe test Europe only
> mj008   3mm VLBA+ALMA+Ap+GBT, no Europe
> c251b   3mm global
> c251c   3mm global no ALMA
> c251d   3mm global
> 
> I also made a tarball so that you may fetch all portions in one go, from here:
> ALL-GMVA2025.v1.tgz
> 
> (wget https://urldefense.com/v3/__ftp://ftp.mpifr-bonn.mpg.de/outgoing/p459kri/3mmapr25/sched/ALL-GMVA2025.v1.tgz__;!!D9dNQwwGXtA!UM3opzABvPspMz8AujYv_qWEtIQG0uHl1P3ylMVV6wxWN_X_9tH0mxCcsUCO046xLwna74uTLCJEzX0O1TsMC1dKFHIl$ )
> 
> 
> kind regards, Thomas
> 
> PS: As in previous session we also provide files *.vex_noptg and *.sum_notpg
> which do not include the (very many) SiO maser pointing scans, which are only needed
> by the VLBA. The files *.sum_notpg are better suited for human readability.
> 
> 
> kind regards, Thomas
> 
> 

-- 
Dr. Thomas P. Krichbaum
Max-Planck-Institut fuer Radioastronomie
Auf dem Huegel 69
D-53121 Bonn / Germany

Mail: tkrichbaum at mpifr-bonn.mpg.de
Tel.: (Germany +49)-228-525-295
Web : https://urldefense.com/v3/__http://www.mpifr-bonn.mpg.de/research/vlbi__;!!D9dNQwwGXtA!RXc-VtzlyM3Nj1oG0AWnPKOmG6w9kW9emjZotIA_EjsA75LUCwdRUC2U6sTrQClqemBHQ99CuUs8FqXXjQEtcVP3-37PZw$