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GEISA-2015 format for absorption cross-sections
1.Header :
The nine first lines of each file define the header describing data parameters.
| Parameter |
Molecule |
Temp |
Pressure |
Resol |
Ref |
Nbline |
WnMin |
WnMax |
| Fortran descriptor (values) |
A20 |
F6.2 |
F9.2 |
F8.4 |
A15 |
I9 |
F11.4 |
F11.4 |
| Undefined values |
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-99999.99 |
-9.99 |
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2.Data format :
For a given molecular species, each file describe absorption cross-section data corresponding to :
- a given temperature in K,
- a given pressure in Pa (which could be unknown),
- a given resolution in cm-1 or nm (which could be unknown),
- some references.
In the spectral range WnMin – WnMax (cm-1).
A compressed cross-section file is named “xxxx_rrrr_[yyyy]_tttt_pppp.asc.gz” where :
- xxxx represent the name of the molecule,
- rrrr the resolution,
- yyyy the reference(s),
- tttt the temperature,
- pppp the pressure.
Example of a file name : cfc-14_00.01_[19]_216.00_005012.93.asc.gz
| Parameter |
Wavenumber
(cm-1) |
Absorption cross-section
(cm2 mol-1) |
| Field length |
13 |
11 |
| Fortran descriptor |
F13.6 |
E11.3 |
To see how to read the GEISA-2015 cross-section sub-database, look at the fortran code : read_CS_G15.f90
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