A two-column file, defining ice cloud property files (see ic_file) in the first column and the correspoding weights in the second column.  

ic_ipa_files file

 
The radiative transfer calculation is performed independently for each cloud column and the result is the weighted average of all independent columns. If ic_ipa_files and wc_ipa_files are both defined, both must have the same columns in the same order, otherwise uvspec will complain. See examples/UVSPEC_WC_IC_IPA_FILES.INP for an example.