Dear Mike > 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".
My understanding of the text: The conforming unit for quantities that represent fractions, or parts of a whole, is "1". is that you can use it for dimensionless numbers. Reflectance is a fraction in one sense: reflected/transmitted. I think that statement is there in order to make clear that CF does *not* support inventing arbitrary dimensionless units such as reflectance_factor, as it goes on to say in that para. I believe the CF checker treats no unit and units of 1 as equivalent. Best wishes Jonathan _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
