MCGeneral

Workspace.MCGeneral(self, mc_spectral_rad: pyarts3.arts.Stokvec | None = None, mc_error: pyarts3.arts.Stokvec | None = None, mc_iteration_count: pyarts3.arts.Index | None = None, atm_field: pyarts3.arts.AtmField | None = None, surf_field: pyarts3.arts.SurfaceField | None = None, subsurf_field: pyarts3.arts.SubsurfaceField | None = None, scat_species: pyarts3.arts.ArrayOfScatteringSpecies | None = None, mc_antenna: pyarts3.arts.MCAntenna | None = None, ray_path_observer_agenda: pyarts3.arts.Agenda | None = None, spectral_propmat_agenda: pyarts3.arts.Agenda | None = None, spectral_rad_space_agenda: pyarts3.arts.Agenda | None = None, spectral_rad_surface_agenda: pyarts3.arts.Agenda | None = None, frequency: pyarts3.arts.Numeric | None = None, sensor_pos: pyarts3.arts.Vector3 | None = None, sensor_los: pyarts3.arts.Vector2 | None = None, mc_seed: pyarts3.arts.Index | None = None, mc_min_iter: pyarts3.arts.Index | None = None, mc_max_iter: pyarts3.arts.Index | None = None, mc_max_scatorder: pyarts3.arts.Index | None = None, mc_std_err: pyarts3.arts.Numeric | None = None, mc_max_time: pyarts3.arts.Numeric | None = None) → None

Backward passive Monte Carlo radiative-transfer calculation.

This ARTS3-native implementation samples antenna directions, extinction collisions, thermal absorption, repeated particle scattering, and space or surface background agendas. It transports all four Stokes components using laboratory-frame phase matrices, including the required polarization-basis rotations. Scattering directions use uniform solid-angle importance sampling.

Authors: Cory Davis, Patrick Eriksson, OpenAI Codex

Parameters:

  • mc_spectral_rad (Stokvec, optional) – Passive Monte Carlo spectral radiance at one frequency. See mc_spectral_rad, defaults to self.mc_spectral_rad [OUT]

  • mc_error (Stokvec, optional) – Standard error of mc_spectral_rad. See mc_error, defaults to self.mc_error [OUT]

  • mc_iteration_count (Index, optional) – Number of photon histories used by MCGeneral(). See mc_iteration_count, defaults to self.mc_iteration_count [OUT]

  • atm_field (AtmField, optional) – An atmospheric field in ARTS, this is the main atmospheric data structure in ARTS. See atm_field, defaults to self.atm_field [IN]

  • surf_field (SurfaceField, optional) – The surface field. See surf_field, defaults to self.surf_field [IN]

  • subsurf_field (SubsurfaceField, optional) – The sub-surface field. See subsurf_field, defaults to self.subsurf_field [IN]

  • scat_species (ArrayOfScatteringSpecies, optional) – The scattering species. See scat_species, defaults to self.scat_species [IN]

  • mc_antenna (MCAntenna, optional) – Transmit and receive antenna pattern for Monte Carlo calculations. See mc_antenna, defaults to self.mc_antenna [IN]

  • ray_path_observer_agenda (Agenda, optional) – Gets the propagation path as it is observed. See ray_path_observer_agenda, defaults to self.ray_path_observer_agenda [IN]

  • spectral_propmat_agenda (Agenda, optional) – Computes the propagation matrix, the non-LTE source vector, and their derivatives. See spectral_propmat_agenda, defaults to self.spectral_propmat_agenda [IN]

  • spectral_rad_space_agenda (Agenda, optional) – Gets spectral radiance as seen of space. See spectral_rad_space_agenda, defaults to self.spectral_rad_space_agenda [IN]

  • spectral_rad_surface_agenda (Agenda, optional) – Computes spectral radiance as seen of the surface. See spectral_rad_surface_agenda, defaults to self.spectral_rad_surface_agenda [IN]

  • frequency (Numeric) – Frequency [Hz]. [IN]

  • sensor_pos (Vector3) – Sensor position [alt, lat, lon]. [IN]

  • sensor_los (Vector2) – Sensor boresight [zenith, azimuth]. [IN]

  • mc_seed (Index, optional) – Random seed. Defaults to 0 [IN]

  • mc_min_iter (Index, optional) – Minimum histories. Defaults to 100 [IN]

  • mc_max_iter (Index, optional) – Maximum histories. Defaults to 10000 [IN]

  • mc_max_scatorder (Index, optional) – Maximum scattering order. Defaults to 20 [IN]

  • mc_std_err (Numeric, optional) – Absolute standard-error stopping threshold in spectral-radiance units; zero disables it. Defaults to 0 [IN]

  • mc_max_time (Numeric, optional) – Wall-clock stopping time [s]; zero disables it. Defaults to 0 [IN]