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Workspace Method ySimpleSpectrometer

Description

Converts iy to y assuming a fixed frequency resolution.

This is a short-cut, avoiding yCalc, that can be used to convert
monochromatic pencil beam data to spectra with a fixed resolution.

The method mimics a spectrometer with rectangular response
functions, all having the same width (*df*). The position of
the first spectrometer channel is set to f_grid[0]+df/2.
The centre frequency of channels are returned as y_f.

Auxiliary variables and jacobians are not handled.

Authors: Patrick Eriksson

Synopsis

ySimpleSpectrometer(

y, y_f, iy, stokes_dim, f_grid, df )

Variables

OUT	y	(Vector)	The measurement vector.
OUT	y_f	(Vector)	The frequencies associated with y.
IN	iy	(Matrix)	Monochromatic pencil beam radiance spectrum.
IN	stokes_dim	(Index)	The dimensionality of the Stokes vector (1-4).
IN	f_grid	(Vector)	The frequency grid for monochromatic pencil beam calculations.
GIN	df	(Numeric)	Selected frequency resolution.