Jonathan, We thought about using "1', but Paragraph 3.1 in CF 1.6 states "1" can be used for fractions or parts of a whole. Reflectance factor is neither a fraction nor part of a whole so I think the better option is Jim's suggestion - no units attribute, unless we're missing something about the uses of "1". Mike
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jonathan Gregory Sent: Monday, May 14, 2012 9:51 AM To: [email protected] Subject: Re: [CF-metadata] Reflectance channel satellite imagery units Dear Mike > > We?re producing a satellite imagery product where the pixel values are > > ?reflectance factors? which is unitless. > > > > What unit definition should we be using to comply with CF? Jim is correct that you can omit the units attribute. It is also permissible and may be more informative to code units="1". A dimensionless number is a legal udunit. Best wishes Jonathan _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
