RFM User's Guide - CLC Flag

CLC Flag
RFM Flags: Calculate Absorption Coefficients for every Path Segment		02MAR24

Enabled

Absorption coefficients for each gas in each path segment are calculated according to local Curtis-Godson parameters
Separate raypath calculated for each distinct ray required for FOV convolution
Disabled

Absorption coefficients for path segments with similar Curtis Godson p,T parameters will be grouped together in a single calculation
Rays for FOV convolutions may be approximated by other rays with similar tangent altitude.
Restrictions: Incompatible with HOM, NAD, TAB and ZEN Flags ^[3]
Notes

Enabling this flag will require significantly more CPU time and memory.

The main purpose of this section is to check that the normally reasonable approximations made in the RFM by default do not significantly affect the results.

Restrictions: in the case of the TAB and HOM Flags, specific absorption coefficients for each path are calculated by definition. For a plane-parallel atmosphere (NAD and ZEN Flags) the Curtis-Godson parameters, hence absorption coefficients per unit absorber, are already mathematically identical for all viewing angles
Bugs: [none recently]

CLC Flag