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Workspace Method refr_index_airMWgeneral

Description

Microwave refractive index due to gases in planetary atmospheres.

The refractivity of a specified gas mixture is calculated and added
to refr_index_air. To obtain the complete value, refr_index_air
should be set to 1 before calling this WSM. This applies also to
*refr_index_air_group.

The expression used is non-dispersive. Hence, refr_index_air and
refr_index_air_group are identical.

Uses the methodology introduced by Newell&Baird (1965) for calculating
refractivity of variable gas mixtures based on refractivity of the
individual gases at reference conditions. Assuming ideal gas law for
converting reference refractivity to actual pressure and temperature
conditions. Reference refractivities are also taken from Newell&Baird (1965)
and are vailable for N2, O2, CO2, H2, and He. Additionally, H2O reference
refractivity has been derived from H2O contribution in Thayer (see
refr_index_airThayer) for T0=273.15K. Any mixture of these gases
can be taken into account.

Authors: Jana Mendrok

Synopsis

refr_index_airMWgeneral(

refr_index_air, refr_index_air_group, rtp_pressure, rtp_temperature, rtp_vmr, abs_species )

Variables

OUT+IN	refr_index_air	(Numeric)	Real part of the refractive index of air.
OUT+IN	refr_index_air_group	(Numeric)	Group index of refractivity.
IN	rtp_pressure	(Numeric)	Pressure at a radiative transfer point.
IN	rtp_temperature	(Numeric)	Temperature at a radiative transfer point.
IN	rtp_vmr	(Vector)	Absorption species abundances for radiative transfer calculations.
IN	abs_species	(ArrayOfArrayOfSpeciesTag)	Tag groups for scalar gas absorption.