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For more details, see the ahats logbook at https://wiki.ucar.edu/display/ahatslogbook
Good wind direction: From July 11, 12:00, until July 13, 12:00, we have
had 25.17 hours or 52% good wind directions with continuous periods
of at least 25 minutes. This includes 18.75 hours stable data and
6.08 hours unstable. The past 24 hours has had a good run of proper
wind directions.
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