pnd_fieldZero

Workspace.pnd_fieldZero(self: pyarts.arts._Workspace, pnd_field: pyarts.arts.WorkspaceVariable | pyarts.arts.Tensor4 | None = self.pnd_field, dpnd_field_dx: pyarts.arts.WorkspaceVariable | pyarts.arts.ArrayOfTensor4 | None = self.dpnd_field_dx, scat_data: pyarts.arts.WorkspaceVariable | pyarts.arts.ArrayOfArrayOfSingleScatteringData | None = self.scat_data, atmosphere_dim: pyarts.arts.WorkspaceVariable | pyarts.arts.Index | None = self.atmosphere_dim, f_grid: pyarts.arts.WorkspaceVariable | pyarts.arts.Vector | None = self.f_grid, cloudbox_limits: pyarts.arts.WorkspaceVariable | pyarts.arts.ArrayOfIndex | None = self.cloudbox_limits, jacobian_quantities: pyarts.arts.WorkspaceVariable | pyarts.arts.ArrayOfRetrievalQuantity | None = self.jacobian_quantities, verbosity: pyarts.arts.WorkspaceVariable | pyarts.arts.Verbosity | None = self.verbosity) → None

Sets pnd_field to zero.

Creates an empty pnd_field of cloudbox size according to cloudbox_limits and with number of scattering elemements according to scat_data. If scat_data is not set yet, it will be filled with one dummy scattering element.

The method works with both scat_data and scat_data_raw. This method primarily exists for testing purposes. On the one hand, empty pnd_field runs can be used to test the agreement between true clear-sky (cloudboxOff()) solutions and the scattering solver solution in factual clear-sky conditions. It is important to avoid discontinuities when switching from thin-cloud to clear-sky conditions. Moreover, scattering calculations using the DOIT method include interpolation errors. If one is interested in this effect, one should compare the DOIT result with an empty cloudbox to a clearsky calculation. That means that the iterative method is performed for a cloudbox with no particles.

Author(s): Claudia Emde, Jana Mendrok

Parameters:

• pnd_field (Tensor4, optional) – Particle number density field. See pnd_field, defaults to self.pnd_field [OUT]

• dpnd_field_dx (ArrayOfTensor4, optional) – Partial derivatives of pnd_field. See dpnd_field_dx, defaults to self.dpnd_field_dx [OUT]

• scat_data (ArrayOfArrayOfSingleScatteringData, optional) – Array of single scattering data. See scat_data, defaults to self.scat_data [INOUT]

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

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

• cloudbox_limits (ArrayOfIndex, optional) – The limits of the cloud box. See cloudbox_limits, defaults to self.cloudbox_limits [IN]

• jacobian_quantities (ArrayOfRetrievalQuantity, optional) – The retrieval quantities in the Jacobian matrix. See jacobian_quantities, defaults to self.jacobian_quantities [IN]

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