MatrixCBR

Workspace.MatrixCBR(self: pyarts.arts._Workspace, output: Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Matrix], stokes_dim: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.stokes_dim, f: Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector], verbosity: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Verbosity]] = self.verbosity) → None

Sets a matrix to hold cosmic background radiation (CBR).

The CBR is assumed to be un-polarized and Stokes components 2-4 are zero. Number of Stokes components, that equals the number of columns in the created matrix, is determined by stokes_dim. The number of rows in the created matrix equals the length of the given frequency vector.

The cosmic radiation is modelled as blackbody radiation for the temperature given by the global constant COSMIC_BG_TEMP, set in the file constants.cc. The frequencies are taken from the generic input vector.

The standard definition, in ARTS, of the Planck function is followed and the unit of the returned data is W/(m3 * Hz * sr).

Author(s): Patrick Eriksson

Parameters:

  • output (Matrix) – Variable to initialize. [OUT]

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

  • f (Vector) – Frequency vector. [IN]

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