[Radioig] voltage UCD?

[Markus Dolensky]

Hi Markus De., Francois, Mireille,


@Markus De:
We are talking about raw (calib_level = 0), complex voltage data (o_ucd = stat.fourier?) from a future radio interferometer that records them in near realtime (dataproduct_type = timeseries).

So yes, stat.fourier is a possible candidate. I will try to source an opinion from one of the Pulsar astronomers designing the data product.

I have taken note of the UCD maintenance process.

@Francois
re ObsCore extension and ADU:
Likewise, I'm following up with the pulsar team on the nature of the voltage data. Timezone difference suggests that won't happen before next week.

@Mireille
Thanks a lot for jump-starting the RFM.

@All
Depending on said internal clarifications, we may or may not propose something new. Given that the respective data product does not yet exist, there is no particular urgency and no shortage of uncertainty.


For now, thanks for the great considerate responses!
Markus

Markus Dolensky
Technical Leader
International Centre for Radio Astronomy Research
The University of Western Australia | M468, 35 Stirling Highway | Perth WA 6009
T +61 8 6488 5072


On 30/3/2023 22:33, Mireille LOUYS wrote:
Hi Markus , hi radio astronomers,

I think we can discuss the definition of a new term, if the requirement is to label a measurement corresponding to some voltage.

The current procedure for UCD addition is to prepare a short document to explain the context for adding a new term.
This can be done in a short file called VEP-UCD.
I have prepared such a file , as included here below.

The first step is to discuss the detailed information of the VEP, and the group can finalise the requirement for this UCD :

here is my proposal , to be completed by your inputs as radioastronomers.

----  starts of: VEP-UCD-012_voltage------
Vocabulary extension proposal for UCDs /
Vocabulary: UCDlist 1.6
Author: mireille louys for radio interest group
Date: 2023-03-29

New Term: phys.voltage
Action: Addition
Label: Voltage (measured by an instrument)
Prefix: Q
Description:  Voltage quantity

Relationships: can be combined with instr.param for observing configuration
Rationale:
Radio data in raw format can measure a voltage quantity as signal, before the data is calibrated.
'phys.voltage' can be used as well to identify a parameter of the observation configuration used with an instrument.

Discussion:
To be completed by radio and semantics WG remarks
Pros and cons ...
Other existing ucd terms that can be used instead...

Response: (To be completed by UCD board after discussion)

----  end of VEP-UCD-012_voltage------

When we agree, this can be added on the RequestForModificationPage here:
https://wiki.ivoa.net/twiki/bin/view/IVOA/UCDList_1-6_RFM<https://aus01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.ivoa.net%2Ftwiki%2Fbin%2Fview%2FIVOA%2FUCDList_1-6_RFM&data=05%7C01%7Cmarkus.dolensky%40uwa.edu.au%7C1505582bcca24b7b14af08db312bcbba%7C05894af0cb2846d8871674cdb46e2226%7C0%7C0%7C638157837322661155%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=1p02IyWJqSE%2BphENHLgfJUX%2BKktvNvgf80OncbtL3mo%3D&reserved=0>

many thanks for your inputs to finalise this first step.

cheers , Mireille

Le 30/03/2023 à 13:21, Markus Demleitner a écrit :

Hi Markus,

On Tue, Mar 28, 2023 at 06:30:55AM +0000, Markus Dolensky wrote:


Can somebody suggest a UCD for complex voltage data, please?

Context is the Obscore o_ucd for PSRFITS data.


Hm... it would seem nobody has an immediate solution, and reviewing
the current UCD list make me suspect there's nothing remotely
matching -- although I have to admit that I've no clue of PSRFITS...
Does what you'd like to annotate have a complex part because of phase
information in a fourier transform?  If so, perhaps stat.fourier
could remotely work?

With that caveat, I suppose the Right Thing™ to do would be to
propose a new UCD.  This is less of a hassle than it might sound like
-- see
https://ivoa.net/documents/UCDlistMaintenance/20191007/REC-UCDlistMaintenance-2.0-20191007.pdf<https://aus01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fivoa.net%2Fdocuments%2FUCDlistMaintenance%2F20191007%2FREC-UCDlistMaintenance-2.0-20191007.pdf&data=05%7C01%7Cmarkus.dolensky%40uwa.edu.au%7C1505582bcca24b7b14af08db312bcbba%7C05894af0cb2846d8871674cdb46e2226%7C0%7C0%7C638157837322661155%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=KtRTHE8o3PzBeCbqFVETWvnhKGpfXHvwVQijVGymNz4%3D&reserved=0>.

However, I suppose it would be a good idea to discuss the RFM here
first before handing it over to Semantics.

         -- Markus



--
--
Mireille Louys,  MCF (Associate Professor)
Centre de données CDS           IPSEO, Images, Laboratoire Icube
Observatoire de Strasbourg      Telecom Physique Strasbourg
11 rue de l'Université          300, Bd Sebastien Brandt CS 10413
F- 67000-STRASBOURG             F-67412 ILLKIRCH Cedex
Tel: +33 3 68 85 24 34

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.ivoa.net/pipermail/radioig/attachments/20230331/839e5c8e/attachment.htm>