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Hi Catherine, I've verified that "meters per second per second" and "" work for the > acceleration "m/s2", "m.s-2", "m s-2" would also work, if you want symbols. > and unitless quantities respectively. Fixing these two solved most of my > errors, but there is one more puzzler remaining: > > How should "seconds since 1970.1.1" be changed to be CF compliant? > The UDUNITS package follows the ISO 8601 standard for timestamps, so your "unit" (it ain't one, really, but that's a story for another time) would be "seconds since 1970-01-01". I'd still like to know what a "DN" is. Regards, Steve Emmerson UDUNITS Developer Ticket Details =================== Ticket ID: ODA-678107 Department: Support UDUNITS Priority: High Status: Open =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.