spectral_propmatAddFaraday

Workspace.spectral_propmatAddFaraday(self, spectral_propmat: pyarts3.arts.PropmatVector | None = None, spectral_propmat_jac: pyarts3.arts.PropmatMatrix | None = None, freq_grid: pyarts3.arts.AscendingGrid | None = None, select_species: pyarts3.arts.SpeciesEnum | None = None, jac_targets: pyarts3.arts.JacobianTargets | None = None, atm_point: pyarts3.arts.AtmPoint | None = None, ray_point: pyarts3.arts.PropagationPathPoint | None = None) → None

Calculates absorption matrix describing Faraday rotation.

Faraday rotation is a change of polarization state of an electromagnetic wave propagating through charged matter by interaction with a magnetic field. Hence, this method requires that the magnetic field is non-zero and that the electron density is held by atm_point (SpeciesEnum : free_electrons).

Faraday rotation affects Stokes parameters 2 and 3 (but not intensity!).

Like all spectral_propmat-modifying methods, the method is additive, i.e., does not overwrite the propagation matrix spectral_propmat, but adds further contributions.

Author: Patrick Eriksson

Parameters:

• spectral_propmat (PropmatVector, optional) – This contains the fully polarized propagation matrix for the current path point. See spectral_propmat, defaults to self.spectral_propmat [INOUT]

• spectral_propmat_jac (PropmatMatrix, optional) – Partial derivative of the spectral_propmat with regards to jac_targets. See spectral_propmat_jac, defaults to self.spectral_propmat_jac [INOUT]

• freq_grid (AscendingGrid, optional) – A frequency grid. Unit: Hz. See freq_grid, defaults to self.freq_grid [IN]

• select_species (SpeciesEnum, optional) – Species selection. See select_species, defaults to self.select_species [IN]

• jac_targets (JacobianTargets, optional) – A list of targets for the Jacobian Matrix calculations. See jac_targets, defaults to self.jac_targets [IN]

• atm_point (AtmPoint, optional) – An atmospheric point in ARTS. See atm_point, defaults to self.atm_point [IN]

• ray_point (PropagationPathPoint, optional) – A single path point. See ray_point, defaults to self.ray_point [IN]