ARTS built-in documentation server
Workspace Method spectral_radiance_fieldClearskyPlaneParallel
Description
Clear-sky radiance field of a plane parallel atmosphere. The method assumes a 1D flat planet. Radiances along each direction given by za_grid are calculated using ppathPlaneParallel and iyEmissionStandard. Surface properties are defined by iy_surface_agenda, i.e. there is no restriction to e.g. specular surfaces. Note that the variable ppath_lmax is considered, and that it can be critical for the accuracy for zenith angles close to 90 degrees. That is, using ppath_lmax=-1 is not recommended for this function. Information on transmission is also provided by the GOUT *trans_field*. For up-welling radiation (scat_za > 90), this variable holds the transmission to space, for considered position and propagation direction. For down-welling radiation, *trans_field* holds instead the transmission down to the surface.
Authors: Patrick Eriksson
Synopsis
| spectral_radiance_fieldClearskyPlaneParallel( | spectral_radiance_field, trans_field, propmat_clearsky_agenda, water_p_eq_agenda, iy_space_agenda, iy_surface_agenda, iy_cloudbox_agenda, stokes_dim, f_grid, atmosphere_dim, p_grid, z_field, t_field, nlte_field, vmr_field, abs_species, wind_u_field, wind_v_field, wind_w_field, mag_u_field, mag_v_field, mag_w_field, z_surface, ppath_lmax, rte_alonglos_v, surface_props_data, za_grid, use_parallel_iy ) |
Variables
| OUT | spectral_radiance_field | (Tensor7) | Spectral radiance field. |
| GOUT | trans_field | (Tensor3) | Dimensions: [f_grid,p_grid,za_grid]. See further above. |
| IN | propmat_clearsky_agenda | (Agenda) | Agenda calculating the absorption coefficient matrices. |
| IN | water_p_eq_agenda | (Agenda) | Agenda to calculate the saturation pressure of water. |
| IN | iy_space_agenda | (Agenda) | Agenda providing the downwelling radiation at the top of the atmosphere. |
| IN | iy_surface_agenda | (Agenda) | Agenda providing the upwelling radiation from the surface. |
| IN | iy_cloudbox_agenda | (Agenda) | Agenda deriving the intensity at boundary or interior of the cloudbox. |
| IN | stokes_dim | (Index) | The dimensionality of the Stokes vector (1-4). |
| IN | f_grid | (Vector) | The frequency grid for monochromatic pencil beam calculations. |
| IN | atmosphere_dim | (Index) | The atmospheric dimensionality (1-3). |
| IN | p_grid | (Vector) | The pressure grid. |
| IN | z_field | (Tensor3) | The field of geometrical altitudes. |
| IN | t_field | (Tensor3) | The field of atmospheric temperatures. |
| IN | nlte_field | (EnergyLevelMap) | The field of NLTE temperatures and/or ratios. |
| IN | vmr_field | (Tensor4) | VMR field. |
| IN | abs_species | (ArrayOfArrayOfSpeciesTag) | Tag groups for gas absorption. |
| IN | wind_u_field | (Tensor3) | Zonal component of the wind field. |
| IN | wind_v_field | (Tensor3) | Meridional component of the magnetic field. |
| IN | wind_w_field | (Tensor3) | Vertical wind component field. |
| IN | mag_u_field | (Tensor3) | Zonal component of the magnetic field. |
| IN | mag_v_field | (Tensor3) | Meridional component of the magnetic field. |
| IN | mag_w_field | (Tensor3) | Vertical component of the magnetic field. |
| IN | z_surface | (Matrix) | The surface altitude. |
| IN | ppath_lmax | (Numeric) | Maximum length between points describing propagation paths. |
| IN | rte_alonglos_v | (Numeric) | Velocity along the line-of-sight to consider for a RT calculation. |
| IN | surface_props_data | (Tensor3) | Various surface properties. |
| IN | za_grid | (Vector) | Zenith angle grid. |
| GIN | use_parallel_iy | (Index, Default: 0) | 0: Parallelize over zenith angles 1: Use more memory intensiv iyEmissionStandardParallel* |