abs_lookupSetup

Set up input parameters for abs_lookupCalc.

More information can be found in the documentation for method abs_lookupSetupBatch()

Max and min values of H2O and temperature are adjusted to allow for numerical perturbations in Jacobian calculation.

The input variables abs_nls_interp_order and abs_t_interp_order are used to make sure that there are enough points in abs_nls_pert and abs_t_pert for the chosen interpolation order.

Note: For homogeneous 1D cases, it can be advantageous to calculate abs_lookup from the 1D atmosphere, and to expand the atmosphere to 3D only after that. This particularly if nonlinear species (i.e., H2O) are involved. See also: abs_lookupSetupBatch()

Author(s): Stefan Buehler

Parameters:

abs_p (Vector, optional) – List of pressures to be used for the calculation of absorption. See abs_p, defaults to self.abs_p [OUT]
abs_t (Vector, optional) – List of temperatures to be used for the calculation of absorption. See abs_t, defaults to self.abs_t [OUT]
abs_t_pert (Vector, optional) – Temperature perturbations for the absorption lookup table. See abs_t_pert, defaults to self.abs_t_pert [OUT]
abs_vmrs (Matrix, optional) – The VMRs (unit of absolute number) on the abs_p grid. See abs_vmrs, defaults to self.abs_vmrs [OUT]
abs_nls (ArrayOfArrayOfSpeciesTag, optional) – Nonlinear species for absorption lookup table generation. See abs_nls, defaults to self.abs_nls [OUT]
abs_nls_pert (Vector, optional) – Fractional perturbations for the nonlinear species in the absorption. See abs_nls_pert, defaults to self.abs_nls_pert [OUT]
atmosphere_dim (Index, optional) – The atmospheric dimensionality (1-3). See atmosphere_dim, defaults to self.atmosphere_dim [IN]
p_grid (Vector, optional) – The pressure grid. See p_grid, defaults to self.p_grid [IN]
t_field (Tensor3, optional) – The field of atmospheric temperatures. See t_field, defaults to self.t_field [IN]
vmr_field (Tensor4, optional) – VMR field. See vmr_field, defaults to self.vmr_field [IN]
atmfields_checked (Index, optional) – OK-flag for atmospheric grids and (physical) fields. See atmfields_checked, defaults to self.atmfields_checked [IN]
abs_species (ArrayOfArrayOfSpeciesTag, optional) – Tag groups for gas absorption. See abs_species, defaults to self.abs_species [IN]
abs_p_interp_order (Index, optional) – The interpolation order to use when interpolating absorption. See abs_p_interp_order, defaults to self.abs_p_interp_order [IN]
abs_t_interp_order (Index, optional) – The interpolation order to use when interpolating absorption between. See abs_t_interp_order, defaults to self.abs_t_interp_order [IN]
abs_nls_interp_order (Index, optional) – The interpolation order to use when interpolating absorption between. See abs_nls_interp_order, defaults to self.abs_nls_interp_order [IN]
p_step (Numeric, optional) – Maximum step in log10(p[Pa]). If the pressure grid is coarser than this, additional points are added until each log step is smaller than this. Defaults to 0.05 [IN]
t_step (Numeric, optional) – The temperature variation grid step in Kelvin, for a 2D or 3D atmosphere. For a 1D atmosphere this parameter is not used. Defaults to 100 [IN]
h2o_step (Numeric, optional) – The H2O variation grid step [fractional], if H2O variations are done (which is determined automatically, based on abs_species and the atmospheric dimension). For a 1D atmosphere this parameter is not used. Defaults to 100 [IN]
verbosity (Verbosity) – ARTS verbosity. See verbosity, defaults to self.verbosity [IN]