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<div class="moz-cite-prefix">Hi Markus x2,</div>
<div class="moz-cite-prefix"> Does that relate to the point raised
last fall by Alessandra and Vincenzo in their discussion of the
ObsCore extension for radio data ?</div>
<div class="moz-cite-prefix">I copy pate the discussion here</div>
<div class="moz-cite-prefix">
<blockquote type="cite">
<div class="document-content-snippet" style="border: 1px solid
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overflow-wrap: break-word; word-wrap: break-word; word-break:
break-word;"><span class="notranslate" style="font: 400 14px
Roboto, Arial, Helvetica, sans-serif; line-height: 20px;
color: #3c4043;">The use of o_ucd=phot.flux.density for raw
single dish data does not seem appropriate, since the single
dish measured quantity is expressed in raw counts. These
counts come from the digitisation of a voltage signal
generated in the receiver chain by the incoming
electromagnetic field.</span></div>
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<h3 style="display: inline-block; font: 500 14px
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6px 0 2px 0;">François Bonnarel</h3>
<span style="color: #5F6368; font: 400 12px/16px
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letter-spacing: 0.2px; white-space: nowrap;">•
19:26, 3 janv. (CET)</span>
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<div style="margin-top: 6px;" class="notranslate">there
is phot.count : wouldn't that be ok for raw single
dish data ?</div>
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<h3 style="display: inline-block; font: 500 14px
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6px 0 2px 0;">Marco Molinaro</h3>
<span style="color: #5F6368; font: 400 12px/16px
Roboto, Arial, Helvetica, sans-serif;
letter-spacing: 0.2px; white-space: nowrap;">•
07:45, 11 janv. (CET)</span>
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<div style="margin-top: 6px;" class="notranslate">I
think it doesn't because it's not photons that are
recorded by the ADC conversion of the EM field.
This looks semantically different. But I need @<a
href="mailto:alessandra.zanichelli@inaf.it"
target="_blank" class="moz-txt-link-freetext">alessandra.zanichelli@inaf.it</a>
to check if my comment is right.</div>
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<h3 style="display: inline-block; font: 500 14px Google
Sans, Roboto, Arial, Helvetica, sans-serif;
letter-spacing: .25px; line-height: 20px; margin: 6px
0 2px 0;">Baptiste Cecconi</h3>
<span style="color: #5F6368; font: 400 12px/16px Roboto,
Arial, Helvetica, sans-serif; letter-spacing: 0.2px;
white-space: nowrap;">• 13:25, 28 janv. (CET)</span>
<h4 style="background: #1a73e8; border-radius: 8px;
color: #fff; display: inline-block; font: 700
12px/16px Roboto, Arial, Helvetica, sans-serif;
margin-bottom: 0; margin-top: 0; margin-left: 10px;
padding: 0 6px;">Nouveau</h4>
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<div style="margin-top: 6px;" class="notranslate">there
might indeed be some semantics issue here. We had
this discusssion a few years ago in the Semantics
WG, and the proposed solution was to use
"phot.flux.density" for both photometric flux
density and EM wave flux density, since there would
be no sense to have 2 terms in this case. I would
say that the raw counts issue is different:
"phot.count" means "Flux expressed in counts" (and
this is really counting photon hits), whereas the
output of an RF ADC is not photon hit counts. I'm
submitting a new term for ADU (i.e., analogue to
digital converter units) to the UCD group.</div>
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<div class="moz-cite-prefix">I think Baptiste already submitted his
proposal to the UCD group.</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Cheers</div>
<div class="moz-cite-prefix">François<br>
</div>
<div class="moz-cite-prefix"><br>
</div>
<div class="moz-cite-prefix">Le 30/03/2023 à 13:21, Markus
Demleitner a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:20230330112110.tkkxgeilrye4avoh@victor">
<pre class="moz-quote-pre" wrap="">Hi Markus,
On Tue, Mar 28, 2023 at 06:30:55AM +0000, Markus Dolensky wrote:
</pre>
<blockquote type="cite">
<pre class="moz-quote-pre" wrap="">Can somebody suggest a UCD for complex voltage data, please?
Context is the Obscore o_ucd for PSRFITS data.
</pre>
</blockquote>
<pre class="moz-quote-pre" wrap="">
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
<a class="moz-txt-link-freetext" href="https://ivoa.net/documents/UCDlistMaintenance/20191007/REC-UCDlistMaintenance-2.0-20191007.pdf">https://ivoa.net/documents/UCDlistMaintenance/20191007/REC-UCDlistMaintenance-2.0-20191007.pdf</a>.
However, I suppose it would be a good idea to discuss the RFM here
first before handing it over to Semantics.
-- Markus
</pre>
</blockquote>
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