[GMVAtech 72] Re: Fwd: Re: Draft GMVA Block Schedule for Session 2023/I starting on May 04
Thomas Krichbaum
tkrichbaum at mpifr-bonn.mpg.de
Mon Mar 13 14:54:29 CET 2023
ok, I see. the main point would be to define the lower and upper edge of the wider frequency band.
Most likely I should be roughtly centered on the 86012-86524 MHz band. The formal band center would be
at 86012+512/2 = 86012 + 256 = 86268. MHz.
Do you or Helge know the low/high freqs for the recorded ALMA band before the zoom band is applied ?
This may be a question to the APP team. I don't know this.
best Thomas
On 13/03/2023 14:41, jwagner wrote:
>
> Regarding correlator spectral output, it would be multiple 64 MHz bands like in "normal" mode. The wideband 2048 MHz baselines will
> have quite a few more of the 64 MHz bands, many that absent on 512 MHz baselines. For FITS-IDI the limit to the maximum number of
> IFs is iirc 32 IF (?). I'll have to double-check. But that would just match a 2048 MHz total.
>
> On 2023-03-13 14:03, Thomas Krichbaum wrote:
>> fyi, please talk to Helge for possible limitations within the existing standard setup.
>> Do you really have time to deal with additional data, which in the end will not be used
>> in the scientific analysis ? I cannot imagine how to fringe fit and combined
>> broad band data of a small sub-array
>> with the 'normal' mode.
>>
>> best Thomas
>>
>>
>> -------- Forwarded Message --------
>> Subject: [GMVAtech 71] Re: Draft GMVA Block Schedule for Session 2023/I
>> starting on May 04
>> Date: Mon, 13 Mar 2023 13:59:58 +0100
>> From: Thomas Krichbaum <tkrichbaum at mpifr-bonn.mpg.de>
>> To: Jun Yang <jun.yang at chalmers.se>, Eduardo Ros <eros at mpifr-bonn.mpg.de>,
>> Helge Rottmann <rottmann at mpifr-bonn.mpg.de>, gmvatech
>> <gmvatech at lists.mpifr-bonn.mpg.de>
>> CC: Roger Hammargren <roger.hammargren at chalmers.se>
>>
>> Hi
>>
>> I haven't thought deeply about this, since it requires
>> coordination with all stations, including ALMA, GLT, LMT.
>>
>> I leave it to Helge to answer this and I cc to gmvatech.
>>
>> Of course the band should include the standard sky frequency range
>> 86012.00 -> 86524.00 MHz.
>>
>> Since the wideband recording is an untested add-on, please make sure that
>> standard setup, circular polarisation performance and data transfer is not
>> affected in any bad way. We don't want to corrupt approved proposals.
>>
>>
>> Helge: The larger bandwidth may affect polarisation. I guess the circular polarizers
>> are calculated for optimal performance within our 512 MHz band. I don't know
>> how the cross-polarisation changes outside this band. Owing to limitations at
>> the correlator, we should avoid polarisation conversion from other stations than
>> ALMA and LMT.
>>
>>
>>
>> kind regards, Thomas
>>
>>
>>
>> On 13/03/2023 13:29, Jun Yang wrote:
>>> Hi Eduardo, Thomas and Helge,
>>>
>>> What is the observing frequency range at the 16-Gbps stations in the upcoming GMVA session? Onsala may also run the 16-Gbps
>>> observations via our DBBC3 backend in parallel.
>>>
>>>
>>> Regards,
>>>
>>> Jun
>>>
>>>> On 9 Mar 2023, at 22:09, Eduardo Ros <ros at mpifr-bonn.mpg.de <mailto:ros at mpifr-bonn.mpg.de>> wrote:
>>>>
>>>>
>>>> GMVA Session May 2023
>>>> =======================
>>>>
>>>>
>>>> To: GMVA Principal Investigators and Observatory Staff
>>>>
>>>>
>>>> Please find attached Version 0.6 of the Block Schedule for the coming
>>>> GMVA 3mm VLBI session May 2023. The projects which are scheduled
>>>> have been selected by the VLBA and European GMVA Schedulers, based on
>>>> the proposal reviews at NRAO and other GMVA observatories.
>>>>
>>>>
>>>> PI's role in schedule making
>>>> ==========================
>>>> Thomas Krichbaum (tkrichbaum at mpifr-bonn.mpg.de <mailto:tkrichbaum at mpifr-bonn.mpg.de>) will make an
>>>> integrated observing schedule for the session.
>>>>
>>>> ** PIs are asked to contact him, to specify to what extent they wish
>>>> ** to be involved in designing the schedule for the section of the
>>>> ** session when their project is being observed.
>>>>
>>>> ===> PIs should contact him at the latest by 25 MARCH
>>>> ========
>>>>
>>>> **************************************************************
>>>> * PIs of projects with non-standard set-ups or frequencies *
>>>> * should contact Thomas and specify these precisely. *
>>>> **************************************************************
>>>>
>>>> The final, integrated schedule for the session will be made available
>>>> to the GMVA observatories by 06 APRIL, this time exceptionally (due
>>>> to the planning of the coming EHT session in April) four weeks
>>>> before the start of the session on 04 MAY
>>>> ======
>>>>
>>>>
>>>> Participating telescopes
>>>> ========================
>>>> Unless otherwise indicated on the schedule, the participating European
>>>> telescopes ("Eu" on the schedule) are:
>>>>
>>>> Effelsberg (Eb)
>>>> IRAM NOEMA (Pb)
>>>> Yebes-40m (Ys)
>>>> Onsala-20m (On)
>>>> Metsaehovi (Mh) (on a best-effort basis)
>>>> Greenland T. (Gl) (on a best-effort basis)
>>>>
>>>>
>>>> The telescopes available at the VLBA are:
>>>>
>>>> VLBA_NL
>>>> VLBA_FD
>>>> VLBA_LA
>>>> VLBA_PT
>>>> VLBA_KP
>>>> VLBA_BR
>>>> VLBA_OV
>>>> VLBA_MK
>>>>
>>>> Telescopes of the Korean VLBI Network (KVN) will take part in projects:
>>>>
>>>> MP005A
>>>> MI004
>>>> MN004A
>>>> MR014A
>>>> POLCAL3
>>>> MJ004
>>>> MR014B
>>>> MP008
>>>> MK025
>>>> MB019C
>>>> MR014C
>>>> MP005B
>>>>
>>>> The GBT will take part in projects:
>>>>
>>>> MP005A
>>>> MI004
>>>> MP008
>>>> MK025
>>>> MP005B
>>>>
>>>> ALMA will take part in projects:
>>>>
>>>> MP005A (2023.1.00750.V)
>>>> MI004 (2023.1.01054.V)
>>>> MN004A (2023.1.00366.V)
>>>> MN004B (2023.1.00366.V)
>>>> MN004C (2023.1.00366.V)
>>>> MJ004 (2023.1.00853.V)
>>>> MK025 (2023.1.00710.V)
>>>> MP005B (2023.1.00750.V)
>>>>
>>>> The LMT will participate on a best-effort basis in experiments with a
>>>> preference for night scheduling (04-13 UT in May 2023):
>>>>
>>>> MP005A (2023-S1-MX-1)
>>>> MI004 (2023-S1-MX-3)
>>>> MR014A (2023-S1-US-17)
>>>> MJ004 (2023-S1-MX-2)
>>>> MR014B (2023-S1-US-17)
>>>> MR014C (2023-S1-US-17)leaning on
>>>> MP005B (2023-S1-MX-1)
>>>> MP008 (2023-S1-MX-23, potentially with daytime observations)
>>>>
>>>> ATCA and Mopra will participate on a best-effort basis for experiments:
>>>> MP005A
>>>> MI004
>>>> MJ004
>>>> MP005B
>>>>
>>>> Haystack is expected to participate on a best-effort basis for experiments:
>>>>
>>>> MI004
>>>> MR014A
>>>> MR014B
>>>> MR014C
>>>>
>>>> 7mm observations, potentially including Noto for common coverage with
>>>> the VLBA, have been requested for experiments:
>>>> MB019B
>>>> MB019C
>>>>
>>>>
>>>> Recording mode
>>>> ==============
>>>>
>>>> All projects are aimed to be recorded at GMVA observatories using the
>>>> GMVA 4 Gbps DDC mode, for the stations which can support that.
>>>>
>>>> Several projects have requested a subset of the antennas to observe
>>>> at 16 Gbps, this is being implemented.
>>>>
>>>> All data will be correlated at the Bonn DiFX software correlator.
>>>> Available disk capacity will determine the fraction of the scheduled
>>>> time which can be spent recording data. Helge Rottmann (Chair of the
>>>> GMVA Technical Group) will make a final decision on this when all the
>>>> constraints have been considered.
>>>>
>>>>
>>>> Polarization
>>>> ============
>>>> All observations will be recorded using dual LHC+RHC polarization at
>>>> those telescopes where this is possible.
>>>>
>>>>
>>>> General considerations
>>>> ======================
>>>>
>>>> A copy of the block schedule is available on the MPIfR FTP server in
>>>> case minor mistakes are fixed. Major changes and the final schedule will be
>>>> communicated via email. This is the address:
>>>> ftp://ftp.mpifr-bonn.mpg.de/outgoing/ros/GMVA/MMschedule_2023_1.asc
>>>> <ftp://ftp.mpifr-bonn.mpg.de/outgoing/ros/GMVA/MMschedule_2023_1.asc>
>>>> ftp://ftp.mpifr-bonn.mpg.de/outgoing/ros/GMVA/MMschedule_2023_1.pdf
>>>> <ftp://ftp.mpifr-bonn.mpg.de/outgoing/ros/GMVA/MMschedule_2023_1.pdf>
>>>>
>>>>
>>>> ==> Please contact me (ros at mpifr-bonn.mpg.de <mailto:ros at mpifr-bonn.mpg.de>) IMMEDIATELY if you
>>>> find any mistakes or problems with this version of the schedule.
>>>>
>>>>
>>>> Eduardo Ros
>>>>
>>>> (European GMVA Scheduler)
>>>>
>>>>
>>>>
>>>>
>>>> <MMschedule_2023_1.asc><MMschedule_2023_1.pdf>
>>>
--
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 : http://www.mpifr-bonn.mpg.de/research/vlbi
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