On Wed, Sep 14, 2016 at 2:01 PM, Jim Biard <[email protected]> wrote:
> CF has consistently maintained adherence to the UDUNITS definition for the > reference time string, and that is different from ISO. (See CF Section 4.4 > <http://cfconventions.org/cf-conventions/v1.6.0/cf-conventions.html#time-coordinate>) > As stated at the top of the section, Z is not used in the case of UTC and > there is a space before any time zone offset.fair enough. > Though as we move forward in versions, I think preferring an ISO standard over "what UDUNITS happens to support" would be a good idea. Example 4.4 is written that way specifically to make it clear that > single-digit numbers are legal. > Hmm -- personally I think the examples should have recommended practice, not allowable practice. And see above ISO8601 should be recommended, even if not required. But maybe that's just my opinion. -CHB > Grace and peace, > > Jim > > On 9/14/16 3:34 PM, Chris Barker wrote: > > I see in teh doc: > > Example 4.4. Time axis > > double time(time) ; > time:long_name = "time" ; > time:units = "days since 1990-1-1 0:0:0" ; > > IIUC, ISO 8601 requires two digits for the time pieces [1], so that should > be: > > "days since 1990-1-1 00:00:00" > > > The parser I use isn't picky about this, but maybe some are? > > BTW, as it's an example, we should probably throw a time offset on there, > too: > > "days since 1990-1-1 00:00:00Z" > > > or > > "days since 1990-1-1 00:00:00+00:00" > > > [1] at least according to wikipedia: https://en. > wikipedia.org/wiki/ISO_8601#Times > > > -Chris > > > -- > > Christopher Barker, Ph.D. > Oceanographer > > Emergency Response Division > NOAA/NOS/OR&R (206) 526-6959 voice > 7600 Sand Point Way NE (206) 526-6329 fax > Seattle, WA 98115 (206) 526-6317 main reception > > [email protected] > > > _______________________________________________ > CF-metadata mailing > [email protected]http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > > -- > [image: CICS-NC] <http://www.cicsnc.org/> Visit us on > Facebook <http://www.facebook.com/cicsnc> *Jim Biard* > *Research Scholar* > Cooperative Institute for Climate and Satellites NC <http://cicsnc.org/> > North Carolina State University <http://ncsu.edu/> > NOAA National Centers for Environmental Information > <http://ncdc.noaa.gov/> > *formerly NOAA’s National Climatic Data Center* > 151 Patton Ave, Asheville, NC 28801 > e: [email protected] > o: +1 828 271 4900 > > *Connect with us on Facebook for climate > <https://www.facebook.com/NOAANCEIclimate> and ocean and geophysics > <https://www.facebook.com/NOAANCEIoceangeo> information, and follow us on > Twitter at @NOAANCEIclimate <https://twitter.com/NOAANCEIclimate> and > @NOAANCEIocngeo <https://twitter.com/NOAANCEIocngeo>. * > > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata > > -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [email protected]
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