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Workspace Method gas_scattering_coefAirSimple

Description

Calculates of scattering coefficient matrix for air.

This function calculates the scattering coefficient for air using a
fitted version from Stamnes et al., 2017 of the numerical results of
Bates, 1984. Internally it calculates the spectrum of scattering
coefficient matrices from the spectrum of scattering cross section matrices,
atmospheric pressure, temperature for one point in the atmosphere. The
function multiplies the cross sections with the number density of gas
molecules under the assumption of an ideal gas to get the coefficients.
The result is returned in gas_scattering_coef. The atmospheric  pressure  and 
temperature  state  has  to  be  specified by  rtp_pressure,
rtp_temperature. The formula is accurate to 0.3 percent for wavelengths
between 0.205 and 1.05 micrometer.

Authors: Jon Petersen

Synopsis

gas_scattering_coefAirSimple(

gas_scattering_coef, f_grid, rtp_pressure, rtp_temperature, stokes_dim )

Variables

OUT	gas_scattering_coef	(PropagationMatrix)	Spectrum of scattering coefficient matrices.
IN	f_grid	(Vector)	The frequency grid for monochromatic pencil beam calculations.
IN	rtp_pressure	(Numeric)	Pressure at a radiative transfer point.
IN	rtp_temperature	(Numeric)	Temperature at a radiative transfer point.
IN	stokes_dim	(Index)	The dimensionality of the Stokes vector (1-4).