<div dir="ltr">The BIPM handbook section 2.2 referenced by Lucio Chiappetti says the symbol is the circle then C, and the formal name is "degree Celsius". so it seems like it has to either be the best effort "oC" or "degree Celsius".</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 3, 2016 at 7:49 AM, Forveille thierry <span dir="ltr"><<a href="mailto:thierry.forveille@obs.ujf-grenoble.fr" target="_blank">thierry.forveille@obs.ujf-grenoble.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""> On 03/03/2016 03:31 PM, Lucio Chiappetti wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
It is perhaps a pity that FITS standard 4.3.1 and Table 6 defining compound units do NOT allow to define a compound unit as an unit plus/minus a constant, so one cannot use K–273.15.<br>
</blockquote></span>
Well, it is a pity that the FITS compound units rules allow prefixed-units (I was outvoted on<br>
that one, and still think that was a bad decision), and I am glad they at least do not allow<br>
K–273.15, with the next step of course being (K–273.15)*9/5+32 ;-)<div class="HOEnZb"><div class="h5"><br>
<br>
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