[Heig] Thematic meeting: ObsCore and extensions

[Bruno Khelifi]

Dear all,

It seems that the proposed time slots are not ideal for all. We will try 
to find a good one, leaving a bit more time to work on the proposal;)

I have extended the pool with the 10th, 11th, 12th and 13th of February: 
https://strawpoll.com/e6Z2AWvY6gN

The best,
Bruno and Janet


Le 29/01/2025 à 10:02, Bruno Khelifi via heig a écrit :
>
> Dear all,
>
> As discussed during our last meeting, a dedicated discussion is 
> necessary to provide to the DM WG (and maybe the TCG) a "HEIG 
> feedback" on the ObsCore extension proposal of Patrick Dowler (see the 
> attached email).
>
> The purpose of the meeting is to answer to the following questions:
> - Should we approve the scheme of extension of ObsCore for the radio 
> or the one of insertion of elements into the core ObsCore DM, in the 
> perspective of our future proposal?
> - Are the proposed elements in line with our possible future proposal?
> - AoB
>
> Discussions have been started by email (see exchanges of François and 
> Ian). We propose to conclude these exchanges with a remote meeting. 
> Here is a pool to choose the best time slot for the experts:
>
> https://strawpoll.com/e6Z2AWvY6gN
>
> I do imagine that Ian, Mathieu and François may desire to present 
> their thoughts. Any contributions are welcome!
>
> The best,
> Bruno
>
>
>
> Le 06/01/2025 à 21:08, Janet Evans via heig a écrit :
>>
>> See below … a discussion about Obscore on the DM list.  We can 
>> discuss next mtg if HE folks interested in this topic are also on the 
>> DM list and then I won’t forward.  Since we’re a new IG … thought it 
>> may help.  We’ll definitely get Obscore as a topic of our next mtg.
>>
>> -janet
>>
>>> Begin forwarded message:
>>>
>>> *From: *Patrick Dowler via dm <dm at ivoa.net>
>>> *Subject: **ObsCore and extensions*
>>> *Date: *January 6, 2025 at 3:02:23 PM EST
>>> *To: *Data Models mailing list <dm at ivoa.net>
>>> *Cc: *François Bonnarel <francois.bonnarel at astro.unistra.fr>
>>> *Reply-To: *Patrick Dowler <pdowler.cadc at gmail.com>
>>>
>>> At the last interOp and while comparing the radio extension to
>>> CAOM-2.4 and some new features in WD-CAOM-2.5, it became increasingly
>>> clear that some of the proposed fields for the radio extension are
>>> more generally applicable and in my opinion should be promoted to
>>> "core". I kind of volunteered to write down the details of that, so
>>> here it is that proposal:
>>>
>>> ** core **
>>> s_resolution_min
>>> s_resolution_max
>>> s_fov_min
>>> s_fov_max: I still feel the existing s_fov is already the same as
>>> s_fov_max and not a representative value; it is nominally the size of
>>> the s_region
>>> t_exp_min
>>> t_exp_max
>>> t_exp_mean: In CAOM exposure is already the mean exposure time per
>>> pixel and I feel strongly that the existing ObsCore.t_exptime is
>>> already the same thing (well, it suggests "median exposure time per
>>> pixel" which I think I may have contributed, but median breaks down in
>>> some common nearly degenerate cases and is less useful than mean; we
>>> may need to clarify the definition in ObsCore
>>> f_resolution: absolute spectral resolution is useful, but this should
>>> be named em_resolution
>>>
>>> ** radio extension **
>>> s_maxiumum_angular_scale - I have been convinced by radio people that
>>> maximum_recoverable_scale is more explicit and a better term for this
>>> uv_distance_min
>>> uv_distance_max
>>> uv_distribution_ecc
>>> uv_distribution_fill
>>>
>>> Questions:
>>> 1. How does this impact the time extension?
>>> 2. How does this impact the high energy extension?
>>>
>>> Work:
>>> 1. ObsCore needs to be ported to ivoatex (from docx?) and included 
>>> in ivoa-std
>>> 2. I can set aside time necessary to write the the changes for 
>>> WD-ObsCore-1.2
>>>
>>>
>>> --
>>> Patrick Dowler
>>> Canadian Astronomy Data Centre
>>> Victoria, BC, Canada
>>
>>
> -- 
>
>                           Bruno Khelifi
>                    Physicist at CNRS (laboratory APC, Paris)
>        Phone: +33.1.57.27.61.58 - Fax: +33.1.57.27.60.71
>                APC, IN2P3/CNRS - Universite de Paris Cite
>
-- 

                          Bruno Khelifi
                   Physicist at CNRS (laboratory APC, Paris)
       Phone: +33.1.57.27.61.58 - Fax: +33.1.57.27.60.71
               APC, IN2P3/CNRS - Universite de Paris Cite
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