Table of Contents
General configuration options
apply_reg_limits :
If true, input profiles outside the limits specified in the coefficient files are reset to the min/max. If false, such profiles will generate
warning messages unless verbose is false (default = false). Has no effect if do_checkinput is false.
verbose :
If false, only messages for fatal errors are output (default = true)
do_checkinput :
If true, checks whether input profiles are within both absolute and regression limits.
If false, no check is performed (default = true)
General radiative transfer options
switchrad : Determines input perturbation for AD/K routines: if true, radiancedata_ad/k % bt is used for channels with wavelengths > 3 micrometers,
otherwise radiancedata_ad/k modulo total is used (default = false)
addrefrac : If true, RTTOV calculations account for atmospheric refraction (default = false)
use_q2m : If true, activate use of surface humidity (default = true)
do_lambertian : If true, activate treatment of surface as Lambertian instead of specular reflector for downwelling emitted radiance (default = false)
Visible/IR-only radiative transfer options
addsolar : If true, enable solar calculations for solar-affected channels (default = false)
do_nlte_correction : If true, includes non-LTE bias correction for hi-res sounders (default = false) NB this is independent of addsolar
addaerosl : If true, account for scattering due to aerosols (default = false)
addclouds : If true, account for scattering due to clouds (default = false)
cldstr_threshold : Threshold for stream weights to compute for cloud scattering calculations (default = -1); recommended to be set negative when calling TL, AD or K models. Only applies when addclouds is true.
cldstr_simple : Simplified cloud stream option (one clear and one cloudy stream) appropriate only for high-peaking channels
ozone_data : If true, user is supplying ozone profiles (default = false)
co2_data : If true, user is supplying co2 profiles (default = false)
n2o_data : If true, user is supplying n2o profiles (default = false)
co_data : If true, user is supplying co profiles (default = false)
ch4_data : If true, user is supplying ch4 profiles (default = false)
MW-only radiative transfer options
fastem_version : Version of the FASTEM model to use (default = 5).
supply_foam_fraction : If true, user is sypplying the foam_fraction (see surface window) (default = false).
clw_data : If true, user is supplying clw profiles (default = false).
Principal Components-only radiative transfer options
addpc : If true, carry out Principal Components calculations (default = false).
addradrec : If true, the PC calculations will return reconstructed radiances as well as the PC scores (default = false)
ipcbnd : The index of the PC spectral band: 1-3 for IASI clear-sky simulations; 1 otherwise (default = -1).
ipcreg : The index of the required set of PC predictors: 1-4 for IASI (see table 12 for the number of predictors), and 1-3 for AIRS (for 200, 300 and 400 predictors) (default = -1)
Options related to interpolation and the vertical grid
addinterp : If true, input profiles may be supplied on user-defined levels, and internal interpolation is used (default = false).
spacetop : If true, treat user's model top as space boundary (default = true)
lgradp : Allow TL/AD of user pressure levels if addinterp is true (default = false)
reg_limit_extrap : if is set to true the profiles used for the optical depth calculations are reset to the limit values if some input values fall outside the regression limits (default = false)