specular_losCalc

Workspace.specular_losCalc(self: pyarts.arts._Workspace, specular_los: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.specular_los, surface_normal: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.surface_normal, rtp_pos: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.rtp_pos, rtp_los: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.rtp_los, atmosphere_dim: pyarts.arts.WorkspaceVariable | pyarts.arts.Index | None = self.atmosphere_dim, lat_grid: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.lat_grid, lon_grid: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.lon_grid, refellipsoid: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.refellipsoid, z_surface: pyarts.arts.WorkspaceVariable | pyarts.arts.Matrix | None = self.z_surface, ignore_surface_slope: pyarts.arts.WorkspaceVariable | pyarts.arts.Index | None = 0, verbosity: pyarts.arts.WorkspaceVariable | pyarts.arts.Verbosity | None = self.verbosity) → None

Calculates the specular direction of surface reflections.

A help method to set up the surface properties. This method calculates specular_los, that is required in several methods to convert zenith angles to incidence angles.

The method also returns the line-of-sight matching the surface normal.

The default is to consider the surface slope when calculating the specular direction. That is, the variation of z_surface (as well as the geoid radius) is considered and the specular direction is calculated including the specified topography. This part can be deactivated by setting ignore_surface_slope to 1. In this case, the zenith angle of the specular direction is simply 180-rtp_los[0]. ignore_surface_slope has only an effect for 2D and 3D, as 1D implies a constant radius of the surface (i.e. no topography).

Author(s): Patrick Eriksson

Parameters:

  • specular_los (Vector, optional) – The specular direction (for reflection by a flat surface). See specular_los, defaults to self.specular_los [OUT]

  • surface_normal (Vector, optional) – The normal vector for a point at the surface. See surface_normal, defaults to self.surface_normal [OUT]

  • 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]

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

  • lat_grid (Vector, optional) – The latitude grid. See lat_grid, defaults to self.lat_grid [IN]

  • lon_grid (Vector, optional) – The longitude grid. See lon_grid, defaults to self.lon_grid [IN]

  • refellipsoid (Vector, optional) – Reference ellipsoid. See refellipsoid, defaults to self.refellipsoid [IN]

  • z_surface (Matrix, optional) – The surface altitude. See z_surface, defaults to self.z_surface [IN]

  • ignore_surface_slope (Index, optional) – Flag to control if surface slope is consdered or not. Defaults to 0 [IN]

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