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Ciao , Alberto, <br>
<br>
Yes I think these are part of the Observing conditions metadata we
may want to distribute along <br>
with observations . <br>
<br>
Having the defintions of each term you propose will help to see , <br>
<ul>
<li>what is already re-usable </li>
<li>how common these terms can be across projects </li>
</ul>
<p>Are some specific to some kind of observing mode , f.i. adaptive
optics , etc ...? <br>
</p>
Many thanks for a more complete description of these terms , and may
be typical situation of use .<br>
<br>
Cheers, Mireille<br>
<br>
<br>
<div class="moz-cite-prefix">Le 15/03/2022 à 10:50, Alberto Micol a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:A34A51D4-0711-4655-823A-31C999D3A358@eso.org">
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<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Dear
Semantics WG,</span><span style="mso-fareast-language:EN-GB"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="mso-fareast-language:EN-GB" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">ESO
measures the atmospheric conditions at the various sites
(Paranal, La Silla, Chajnantor, and later Armazones).</span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Here,
a minimal list of the most important quantities measured:</span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Absolute
humidity</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Relative
humidity</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Turbulence
intensity (in units of m**(1/3))</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Temperature</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Dew
temperature</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Precipitable
water vapour</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Wind
direction</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Wind
speed component U, V, W</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Rain
(percentage)</span><span style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB">Coherence
time
</span><span style="color:black;mso-fareast-language:EN-GB"
lang="EN-US">of the turbulence (Tau0)</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Isoplanatic
angle (Theta0)</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Characteristic
velocity of the turbulence</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">S</span><span
style="color:black;mso-fareast-language:EN-GB">mall (0.5
micron) dust
</span><span style="color:black;mso-fareast-language:EN-GB"
lang="EN-US">p</span><span
style="color:black;mso-fareast-language:EN-GB">article count
per cube meter</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"
style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l0
level1 lfo1;background:white">
<!--[if !supportLists]--><span
style="font-size:10.0pt;font-family:Symbol;mso-fareast-language:EN-GB"><span
style="mso-list:Ignore">·<span style="font:7.0pt
"Times New Roman"">
</span></span></span><!--[endif]--><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">etc.</span><span
style="mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Some
of those quantities are measured at different altitudes
around the domes (e.g. from -20m to +30m from the level of
the VLT platform);</span><span
style="mso-fareast-language:EN-GB" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">some
others are measured at very different levels (from 0.5km to
16 km) to build the atmospheric vertical profiles of e.g.,
humidity, temperature, turbulence, etc..</span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US"> </span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">All
those measurements are offered via the ESO TAP (tap_obs).</span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US"> </span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">The
problem is that there are no UCDs I could use to describe
those columns</span><span style="mso-fareast-language:EN-GB"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">(apart
from the obvious phys.temperature, but then what to use for
the dew temeperature?).<o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="mso-fareast-language:EN-GB" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">Would
it be possible to introduce some new UCDs to cover those
concepts?</span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">I
can provide the definitions for the listed quantities, if
that helps defining those UCDs.</span><span
style="color:black;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="mso-fareast-language:EN-GB" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB" lang="EN-US">I
also hope that other ground-based observatories have the
same need, anybody out there?</span><span
style="mso-fareast-language:EN-GB" lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span
style="color:black;mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Many thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Alberto<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">--<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Alberto Micol<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Science Archive Group<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">European Southern
Observatory<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
--
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</pre>
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