*GAS Section | ![]() | ![]() |
Field[1] | Type | Description | Range |
---|---|---|---|
C200 | Name of a | ||
C7 | Chemical Formula. | See List of Absorbers | |
I | HITRAN/RFM index of molecule | See List of Absorbers | |
C1 | Use all significant molecules [3] [4] [5] |
Qualifier | Type | Description | Range |
---|---|---|---|
( | I | HITRAN Isotope index [8] [9] [10] | ±1:(N.isotopes for molecule) |
( | 2I | Lower, Upper HITRAN Global Quantum indices [11] [12] | 1:999 or '*' |
( | C5 | Continuum treatment for gas [6] | 'CTM' or 'NOCTM' |
( | I | Threshold for '*' absorbers [4] | 0:99 |
( | C5 | Treatment of H2O 25cm-1 offset [7] | 'SUB' or 'NOSUB' |
Wildcard
Continuum
An issue arises when trying to model H2O absorption using look-up tables
(
The RFM anticipates this approach so, if calculating
LUTs (
Isotopologues (See RFM Handling of Isotopologues)
Vibrational Bands (See
RFM Vibrational Level Assignments)
Note that the RFM itself
has no way of distinguishing whether an H2O LUT has been
calculated with or without the continuum term.
*GAS
H2O CO2 N2O CH4 HNO3 O3 ! MIPAS target species
O2(CTM) N2(CTM) ! Oxygen and Nitrogen - continua only
minor.gas ! a file of minor species
*(10) ! Plus any other significant absorbers
CO(1)(1:3) NO(1)(1:*) ! Only primary isotopes, and specific bands