This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
Tom, Based on <http://en.wikipedia.org/wiki/Parts-per_notation>, it looks like "ppm" should be a symbol. Regards, Steve Emmerson Ticket Details =================== Ticket ID: BAC-946054 Department: Support UDUNITS Priority: Normal Status: Closed