ppathCalcFromAltitude

Workspace.ppathCalcFromAltitude(self: pyarts.arts._Workspace, ppath: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Ppath]] = self.ppath, ppath_agenda: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Agenda]] = self.ppath_agenda, ppath_lmax: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric]] = self.ppath_lmax, ppath_lraytrace: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric]] = self.ppath_lraytrace, atmgeom_checked: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.atmgeom_checked, f_grid: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.f_grid, cloudbox_on: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.cloudbox_on, cloudbox_checked: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.cloudbox_checked, ppath_inside_cloudbox_do: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Index]] = self.ppath_inside_cloudbox_do, rte_pos: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.rte_pos, rte_los: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.rte_los, rte_pos2: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Vector]] = self.rte_pos2, altitude: Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric], accuracy: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Numeric]] = 0.5, verbosity: Optional[Union[pyarts.arts.WorkspaceVariable, pyarts.arts.Verbosity]] = self.verbosity) → None

Moves rte_pos forwards to near altitude before calling ppathCalc() to compute a different ppath. The accuracy-variable gives minimum distance before the input altitude.

The forward-moving algorithm calls ppathCalc() several times at reduced maximum distances. The intention is to maintain the correct rte_los for a given rte_pos at all altitudes. The method is thus relatively slow, and VERY memory intense at low accuracy.

Intended to be used with “tropospheric corrections” from ground geometry. Not well-tested

Throws error if no altitude is in line of sight.

Author(s): Richard Larsson

Parameters:

  • ppath (Ppath, optional) – The propagation path for one line-of-sight. See ppath, defaults to self.ppath [OUT]

  • ppath_agenda (Agenda, optional) – Calculation of complete propagation paths. See ppath_agenda, defaults to self.ppath_agenda [IN]

  • ppath_lmax (Numeric, optional) – Maximum length between points describing propagation paths. See ppath_lmax, defaults to self.ppath_lmax [IN]

  • ppath_lraytrace (Numeric, optional) – Maximum length of ray tracing steps when determining propagation. See ppath_lraytrace, defaults to self.ppath_lraytrace [IN]

  • atmgeom_checked (Index, optional) – OK-flag for the geometry of the model atmosphere. See atmgeom_checked, defaults to self.atmgeom_checked [IN]

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

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

  • cloudbox_checked (Index, optional) – OK-flag for variables associated with the cloudbox. See cloudbox_checked, defaults to self.cloudbox_checked [IN]

  • ppath_inside_cloudbox_do (Index, optional) – Flag to perform ray tracing inside the cloudbox. See ppath_inside_cloudbox_do, defaults to self.ppath_inside_cloudbox_do [IN]

  • rte_pos (Vector, optional) – A geographical position for starting radiative transfer calculations. See rte_pos, defaults to self.rte_pos [IN]

  • rte_los (Vector, optional) – A line-of-sight for (complete) radiative transfer calculations. See rte_los, defaults to self.rte_los [IN]

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

  • altitude (Numeric) – Altitude to move forward towards. [IN]

  • accuracy (Numeric, optional) – Accuracy of altitude. Defaults to 0.5 [IN]

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