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[UDUNITS #BAC-946054]: UDUnits -- trying to find a list of valid units and prefixes

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  • Subject: [UDUNITS #BAC-946054]: UDUnits -- trying to find a list of valid units and prefixes
  • Date: Wed, 10 Aug 2011 10:22:00 -0600
Tom,

> If I read section 7.10.3 correctly, then I really should say something like:
> 1e-6 dobson / dobson  (or: 1e-6 mole/mole  or  1e-6g/g  or....)
> for ozone concentration.

Any of those would work because they all result in the dimensionless unit 
"1e-6".

> The word I have from our scientists who deal with indirect
> meassurements is that "ppm" is in very widespread use, and is likely
> to show up in files, charts, publications, etc.  I'm wondering if we
> should not considering embracing this, just as we did "dobson"?

I can easily add it to the UDUNITS-2 database.

Should "ppm" be a name or a symbol? Name comparisons are case insensitive 
whereas symbol comparisons are case sensitive -- so "PPM" would be allowed if 
"ppm" were a name but not if it were a symbol.

Once that's decided, then I can also add "ppb".

> Thanks for consideration...
> 
> tom
> 
> --
> Tom Whittaker
> University of Wisconsin-Madison
> Space Science & Engineering Center (SSEC)
> Cooperative Institute for Meteorological Satellite Studies (CIMSS)
> 1225 W. Dayton Street
> Madison, WI  53706  USA
> ph: +1 608 262 2759

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: BAC-946054
Department: Support UDUNITS
Priority: Normal
Status: Closed