With this option the directory is specified where the optical property files for all aerosols species used in the aerosol_species_file are expected: For each species defined in aerosol_species_file, netCDF-file species_name.nc, (e.g. INSO.nc), which contains the optical properties of the aerosol species, has to be provided. The netcdf format is the one produced by the libRadtran mie tool.

At the libRadtran webpage we provide the OPAC data set hess98:_optic_proper_aeros_cloud which can be directly used with uvspec:  

aerosol_species_library OPAC

 
OPAC contains following aerosol species:  

INSO insoluble
WASO water_soluble
SOOT soot
SSAM sea_salt_accumulation_mode
SSCM sea_salt_coarse_mode
MINM mineral_nucleation_mode
MIAM mineral_accumulation_mode
MICM mineral_coarse_mode
MITR mineral_transported
SUSO sulfate_droplets

 
Variations of the mineral aerosol species containing nonspherical particles are:  

MINM_SPHEROIDS mineral_nucleation_mode
MIAM_SPHEROIDS mineral_accumulation_mode
MICM_SPHEROIDS mineral_coarse_mode
MITR_SPHEROIDS mineral_transported

 
The aspect ratio distribution from kandler2009 is adapted.