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.