Hello Catherine, > I've conferred with my colleagues and "DN" is a project-specific abbreviation > that stands for "digital number" that we use for uncalibrated data. There, > now we can both rest easy ... :-) Got it. Not a unit. Regards, Steve Emmerson Ticket Details =================== Ticket ID: ODA-678107 Department: Support UDUNITS Priority: High Status: Closed =================== 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.