...
For more details, see the ahats logbook at https://wiki.ucar.edu/display/ahatslogbook
Good wind direction: From July 11, 12:00, through July 16, 12:00, we have
had 61.08 hours or 51% good wind directions with continuous periods
of at least 25 minutes. This includes 43.33 hours stable data and
16.92 hours unstable. Note that more than half of the stable data
is weakly stable, 0 < z/L < 0.1. With the exception of this near-neutral
data, the balance between stable and unstable is more closely balanced
than the numbers suggest.
...