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Workspace Method SurfaceTessem

Description

TESSEM sea surface microwave emissivity parametrization.

The variable surface_props_data must contain these data:
  "Water skin temperature"
  "Wind speed"
  "Salinity"

This method computes surface emissivity and reflectivity matrices for
ocean surfaces using the TESSEM emissivity model: Prigent, C., et al.
Sea-surface emissivity parametrization from microwaves to millimetre
waves, QJRMS, 2017, 143.702: 596-605.

The validity range of the parametrization of is 10 to 700 GHz, but for
some extra flexibility frequencies between 5 and 900 GHz are accepted.
The accepted temperaute range for water skin temperature is
[260.0 K, 373.0 K]. Salinity shall be in the range [0,1]. That is, a
salinity of 3% is given as 0.03.

The model itself is represented by the neural networks in
tessem_neth and tessem_netv.

Authors: Simon Pfreundschuh, Patrick Eriksson

Synopsis

SurfaceTessem(

surface_los, surface_rmatrix, dsurface_rmatrix_dx, surface_emission, dsurface_emission_dx, stokes_dim, atmosphere_dim, lat_grid, lon_grid, f_grid, rtp_pos, rtp_los, tessem_neth, tessem_netv, surface_props_data, surface_props_names, dsurface_names, jacobian_do )

Variables

OUT	surface_los	(Matrix)	Downwelling radiation directions to consider in surface reflection.
OUT	surface_rmatrix	(Tensor4)	The reflection coefficients for the directions given by surface_los to the direction of interest.
OUT+IN	dsurface_rmatrix_dx	(ArrayOfTensor4)	The derivative of surface_rmatrix with respect to quantities listed in dsurface_names.
OUT	surface_emission	(Matrix)	The emission from the surface.
OUT+IN	dsurface_emission_dx	(ArrayOfMatrix)	The derivative of surface_emission with respect to quantities listed in dsurface_names.
IN	stokes_dim	(Index)	The dimensionality of the Stokes vector (1-4).
IN	atmosphere_dim	(Index)	The atmospheric dimensionality (1-3).
IN	lat_grid	(Vector)	The latitude grid.
IN	lon_grid	(Vector)	The longitude grid.
IN	f_grid	(Vector)	The frequency grid for monochromatic pencil beam calculations.
IN	rtp_pos	(Vector)	Position of a radiative transfer point.
IN	rtp_los	(Vector)	Line-of-sight at a radiative transfer point.
IN	tessem_neth	(TessemNN)	TESSEM2 neural network parameters for horizontal polarization.
IN	tessem_netv	(TessemNN)	TESSEM2 neural network parameters for vertical polarization.
IN	surface_props_data	(Tensor3)	Various surface properties.
IN	surface_props_names	(ArrayOfString)	Name on surface properties found in surface_props_data.
IN	dsurface_names	(ArrayOfString)	Name of surface retrieval quantities.
IN	jacobian_do	(Index)	Flag to activate (clear-sky) Jacobian calculations.