RFM User's Guide - .vib File Format

.vib File
RFM File Formats: Vibrational Index File		27AUG26

Type

Optional Input(s)

Description

Vibrational Index data, associating numerical indices with the C15 character strings (gqu and gql) in the HITRAN .par file.

Filename(s)

Specified in *HIT section of Driver Table

Structure

The file is record-structured.
Comment records (starting with '!') can be inserted anywhere.
The first non-comment record contains a single integer: the number of molecular classes in the profiles.
Then, for each class, there is a header listing the molecules which are included in that class, and then a list of records identifying the HITRAN vibrational level string and the RFM associated index.
Variables shown in lower-case are just included in the file structure for legibility. If they are the last field(s) in the record they can be omitted.
Since the number of fields read from each record is fixed, any subsequent text in the record is ignored and treated as a comment.
All numerical data can be read 'free-format'.

File Structure
!CMNT	Optional Comment record(s)
NCLS	Number of different molecule classes
for icls = 1, NCLS
!CMNT	Optional comment record(s)
cls_id NMOL NVIB	Class#, No. Mols, No.vib levels
for imol = 1, NMOL
MOL_ID molec	Molec#, name
for ivib = 1, NVIB
'VIB_STR' VIB_IDX vmol(1) vmol(2) ...	Vib String, Vib Index, relevant molecules
End of file

Field	Type	Description	Range
!CMNT	C80	Comment records, starting with '`!`'
NCLS	I	No. molecular classes in file	≥ 0
cls_id	I	Index for Class	(ignored)
NMOL	I	No. molecules included in this class	≥ 0
NVIB	I	No. vibrational levels included in this class	≥ 0
MOL_ID	I	HITRAN index of molecule	≥ 1
molec	C*	Name of molecule	(ignored)
'VIB_STR'	C15	HITRAN Label of Vib Level (in quotes)^[1]	(arbitrary)
VIB_IDX	I	RFM index of Vib Level	≥ 0

Notes

'VIB_STR': The actual 15-character string is enclosed in quotes so that any blank spaces at the start and end are included.

Example

vibh24.txt

Python Reader

read_vib.py

.vib File