cox_and_munk_sal valueAt present only available with rte_solver DISORT2. The number of streams (nstr) is automatically increased to 16 if cox_and_munk BRDF is switched on, to avoid numerical problems. The default value is 34.3. To switch on Cox and Munk BRDF, specify any of the cox_and_munk options and define at least cox_and_munk_u10.