May be used to specify cross sections of O3, O2, H2O, CO2, NO2, BRO, OCLO, HCHO, O4, SO2, CH4, N2O, CO, or N2 to be used instead of those supplied with libRadtran. No temperature dependence may be specified. Use as follows:  

crs_file NO2 ../examples/no2_crs.dat

 
The species, e.g. NO2, must be specified to identify the species for which the cross section applies. The cross section file has two columns:

1

wavelength (nm)

2

cross section (cm{}^{2})