# gas.conf
dir_base|dir_base_directory=	# base directory in which all subordinated files can be found
name=none	# name of the gas
fn_cluster_data|fn_data|fn_clusters=file	# cluster data filename. 1 column, number density [N/cm^3]
fn_map=file	# map filename
wavelength_range_nm=none	# lambdaA[nm]~lambdaB[nm]: wavelength range for which lines are extracted
fn_cross_section|fn_cs=file	# 1st row: 0 TAB T1[K] TAB ... TAB TN [K], following rows: wl[nm] TAB cs1 [cm^2] TAB ... TAB csN [cm^2]
cross_section_format|cs_format|csf=wavelength_temperature	# selection: wavelength_temperature|cluster_wavelength|HITRAN :format of cross section file
profile|data=wavelength_temperature	# gas profile data, cluster row format: 1=n[1/cm^3], for table processing: profile[cluster,parameter index]