tion of parcel liquid water converted to 
                precip for cloud top pressures below rn_pbot
                [real, default: rn_frac_bot = 0.8 ]

   rn_frac_top  Fraction of liquid water converted to
                precip for cloud top pressures above rn_ptop
                [real, default: rn_frac_top = 1.0 ]

 --- Cloud order specification

   ncrnd        Number of random cloud-types between krmin and krmax
                to be invoked in a single call to ras
                [integer, default