Specify the Rayleigh cross section.  

rayleigh_crs type

 
Choose between the following Rayleigh scattering cross sections.

Bodhaine

Bodhaine1999 Rayleigh scattering cross section.

Nicolet

Nicolet1984 Rayleigh scattering cross section.

Penndorf

Penndorf1957 Rayleigh scattering cross section.

Bodhaine1999 is default.