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Workspace Method DoitInit

Description

Initialises variables for DOIT scattering calculations.

Note that multi-dimensional output variables (Tensors, specifically)
are zero-initialized. That is, this methods needs to be called
BEFORE other WSMs that provide input to *ScatteringDOIT*, e.g.
before CloudboxGetIncoming.

Authors: Claudia Emde

Synopsis

DoitInit(

scat_p_index, scat_lat_index, scat_lon_index, scat_za_index, scat_aa_index, doit_scat_field, doit_i_field, doit_i_field1D_spectrum, scat_i_p, scat_i_lat, scat_i_lon, doit_is_initialized, stokes_dim, atmosphere_dim, f_grid, scat_za_grid, scat_aa_grid, doit_za_grid_size, cloudbox_on, cloudbox_limits, scat_data_array )

Variables

OUT	scat_p_index	(Index)	Pressure index for scattering calculations.
OUT	scat_lat_index	(Index)	Latitude index for scattering calculations.
OUT	scat_lon_index	(Index)	Longitude index for scattering calculations.
OUT	scat_za_index	(Index)	Zenith angle index for scattering calculations.
OUT	scat_aa_index	(Index)	Azimuth angle index for scattering calculations.
OUT	doit_scat_field	(Tensor6)	Scattered field inside the cloudbox.
OUT	doit_i_field	(Tensor6)	Radiation field.
OUT	doit_i_field1D_spectrum	(Tensor4)	Radiation field for the whole frequency spectrum.
OUT	scat_i_p	(Tensor7)	Intensity field on cloudbox boundary (equal pressure slice).
OUT	scat_i_lat	(Tensor7)	Intensity field on cloudbox boundary (constant latitude slice).
OUT	scat_i_lon	(Tensor7)	Intensity field on cloudbox boundary (equal longitude slice).
OUT	doit_is_initialized	(Index)	Flag to determine if DoitInit was called.
IN	stokes_dim	(Index)	The dimensionality of the Stokes vector (1-4).
IN	atmosphere_dim	(Index)	The atmospheric dimensionality (1-3).
IN	f_grid	(Vector)	The frequency grid for monochromatic pencil beam calculations.
IN	scat_za_grid	(Vector)	Zenith angle grid.
IN	scat_aa_grid	(Vector)	Azimuthal angle grid.
IN	doit_za_grid_size	(Index)	Number of equidistant grid points of the zenith angle grid, defined from 0 to 180 deg, for the scattering integral calculation.
IN	cloudbox_on	(Index)	Flag to activate the cloud box.
IN	cloudbox_limits	(ArrayOfIndex)	The limits of the cloud box.
IN	scat_data_array	(ArrayOfSingleScatteringData)	Raw data of single scattering data.