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Workspace Method ScatSpeciesSizeMassInfo
Description
Derives size and mass information for a scattering species.
This method assumes that the mass-size relationship can described
by scat_species_a and scat_species_b. See documentation of
scat_species_a for details.
The quantity to be used as size descriptor is here denoted as x, and
is selected by setting *x_unit*. The options are:
"dveq" : The size grid is set to scat_meta.diameter_volume_equ
"dmax" : The size grid is set to scat_meta.diameter_max
"area" : The size grid is set to scat_meta.diameter_area_equ_aerodynamical
"mass" : The size grid is set to scat_meta.mass
This selection determines scat_species_x.
The parameters scat_species_a and scat_species_b are determined by
a numeric fit between scat_species_x and corresponding masses in
scat_meta. This fit is performed over sizes inside the range
[x_fit_start,x_fit_end]. This range is allowed to be broader than
the coverage of scat_species_x. There must be at least two sizes
inside [x_fit_start,x_fit_end].
Authors: Manfred Brath, Jana Mendrok, Patrick Eriksson
Synopsis
Variables
OUT | scat_species_x | (Vector) | The size grid of one scattering species. |
OUT | scat_species_a | (Numeric) | Mass-size relationship parameter, for one scattering species. |
OUT | scat_species_b | (Numeric) | Mass-size relationship parameter, for one scattering species. |
IN | scat_meta | (ArrayOfArrayOfScatteringMetaData) | An Array of scattering meta data (scat_meta_single). |
GIN | species_index | (Index) | Take data from scattering species of this index (0-based) in scat_meta. |
GIN | x_unit | (String) | Unit for size grid, allowed options listed above. |
GIN | x_fit_start | (Numeric, Default: 0) | Smallest size to consider in fit to determine a and b. |
GIN | x_fit_end | (Numeric, Default: 1e9) | Largest size to consider in fit to determine a and b. |
GIN | do_only_x | (Index, Default: 0) | A flag to deactivate calculation of a and b, to possibly save some time. The a and b parameters are then set to -1.Default is to calculate a and b. |