Wind speed for cox54a,cox54b ocean BRDF (in m/s).
cox_and_munk_u10 value
At present only available with rte_solver cdisort,
mystic_doc\ifthenelse\booleanrte_solver montecarlo,
and rte_solver fdisort2. The wind
speed is the most important parameter affecting ocean BRDF. The
minimum allowed wind speed is 1 m/s because otherwise the strong
specular reflection causes numerical problems. If a lower value is
specified, the wind speed is automatically set to 1m/s. Also, the
number of streams (nstr) is automatically increased to 16 if
cox_and_munk BRDF is switched on, to avoid numerical problems.
To switch on Cox and Munk BRDF, specify any of the cox_and_munk
options and define at least cox_and_munk_u10.