iySurfaceFastem

Workspace.iySurfaceFastem(self: pyarts.arts._Workspace, iy: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Matrix]] = self.iy, diy_dx: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.ArrayOfTensor3]] = self.diy_dx, iy_transmittance: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Tensor3]] = self.iy_transmittance, iy_id: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.iy_id, jacobian_do: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.jacobian_do, atmosphere_dim: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.atmosphere_dim, nlte_field: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.EnergyLevelMap]] = self.nlte_field, cloudbox_on: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.cloudbox_on, stokes_dim: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.stokes_dim, f_grid: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.f_grid, rtp_pos: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.rtp_pos, rtp_los: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.rtp_los, rte_pos2: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.rte_pos2, iy_unit: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.String]] = self.iy_unit, iy_main_agenda: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Agenda]] = self.iy_main_agenda, surface_skin_t: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric]] = self.surface_skin_t, salinity: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric]] = 0.035, wind_speed: Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric], wind_direction: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric]] = 0, fastem_version: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = 6, verbosity: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Verbosity]] = self.verbosity) → None

Usage of FASTEM for emissivity and reflectivity of water surfaces.

This method allows usage of the FASTEM model inside iy_surface_agenda. The aim is to use FASTEM in the exact same way as done in RTTOV. For example, the transmittance for down- welling radiation is considered. RTTOV os just 1D. Here 2D and 3D are handled as the 1D case, the down-welling radiation is just calculated for the directuon matching specular reflection.

The wind direction is given as the azimuth angle, counted clockwise from north (i.e. an easterly wind is at 90 deg). This matches the general definition of azimuth inside ARTS. For 1D and 2D, the wind direction must be adjusted to match the fact that the line-of-sight is locked to be at 0 deg (180 for 2D in the case of a negative zenith angle). For 3D, the true wind direction shall be used.

FASTEM is called by FastemStandAlone(). See that WSM for further comments on variables and limitations.

Author(s): Patrick Eriksson

Parameters:

  • iy (Matrix, optional) – Monochromatic pencil beam radiance spectrum. See iy, defaults to self.iy [OUT]

  • diy_dx (ArrayOfTensor3, optional) – Derivative of iy with respect to retrieval quantities. See diy_dx, defaults to self.diy_dx [INOUT]

  • iy_transmittance (Tensor3, optional) – Transmittance to be included in iy. See iy_transmittance, defaults to self.iy_transmittance [IN]

  • iy_id (Index, optional) – Identification number of iy. See iy_id, defaults to self.iy_id [IN]

  • jacobian_do (Index, optional) – Flag to activate (clear-sky) Jacobian calculations. See jacobian_do, defaults to self.jacobian_do [IN]

  • atmosphere_dim (Index, optional) – The atmospheric dimensionality (1-3). See atmosphere_dim, defaults to self.atmosphere_dim [IN]

  • nlte_field (EnergyLevelMap, optional) – The field of NLTE temperatures and/or ratios. See nlte_field, defaults to self.nlte_field [IN]

  • cloudbox_on (Index, optional) – Flag to activate the cloud box. See cloudbox_on, defaults to self.cloudbox_on [IN]

  • stokes_dim (Index, optional) – The dimensionality of the Stokes vector (1-4). See stokes_dim, defaults to self.stokes_dim [IN]

  • f_grid (Vector, optional) – The frequency grid for monochromatic pencil beam calculations. See f_grid, defaults to self.f_grid [IN]

  • rtp_pos (Vector, optional) – Position of a radiative transfer point. See rtp_pos, defaults to self.rtp_pos [IN]

  • rtp_los (Vector, optional) – Line-of-sight at a radiative transfer point. See rtp_los, defaults to self.rtp_los [IN]

  • rte_pos2 (Vector, optional) – A second geographical position to define the geometry for. See rte_pos2, defaults to self.rte_pos2 [IN]

  • iy_unit (String, optional) – Selection of output unit for radiative transfer methods. See iy_unit, defaults to self.iy_unit [IN]

  • iy_main_agenda (Agenda, optional) – Calculation of a single monochromatic pencil beam spectrum. See iy_main_agenda, defaults to self.iy_main_agenda [IN]

  • surface_skin_t (Numeric, optional) – Surface skin temperature. See surface_skin_t, defaults to self.surface_skin_t [IN]

  • salinity (Numeric, optional) – Salinity, 0-1. That is, 3% is given as 0.03. Defaults to 0.035 [IN]

  • wind_speed (Numeric) – Wind speed. [IN]

  • wind_direction (Numeric, optional) – Wind direction. See further above. Defaults to 0 [IN]

  • fastem_version (Index, optional) – The version of FASTEM to use. Defaults to 6 [IN]

  • verbosity (Verbosity) – ARTS verbosity. See verbosity, defaults to self.verbosity [IN]