Choose between the various ozone cross sections by  

o3_crs type

 
where type is one of

Bass_and_Paur

Bass1985 ozone cross section.

Molina

Molina1986 ozone cross section.

Daumont

Ozone cross section by Daumont1992, Malicet1995.

Bogumil

Ozone cross section from Bogumil2003.

Molina1986 is default.