FLAIREXT-Optimally extracts spectra from a FLAIR NDF to form a new NDF.

Description:

This application takes a FLAIR frame stored in an NDF with the dispersion along the y axis, and extracts the individual spectra using an optimal extraction. It stores the spectra in an output two-dimensional NDF, configured such that the dispersion is along x axis, and wavelength increases with pixel index, and each spectrum occupies one line.

This assumes stability (x positions of the fibres do not move), and vertical orientation of the fibres. These are satisfied by FLAIR (Parker, private communication).

Usage:

flairext in profile out fibres

Parameters:

FIBRES

The number of fibres to extract. This must be in the range 1 to 92. [92]

IN

A list of the input two-dimensional NDFs containing FLAIR spectra to be extracted.

PROFILE

The vector of weights to use during optimal extraction, as derived from FLAIRCOMP.

OUT

The list of the two-dimensional NDF containing the extracted FLAIR spectra. There should be as many files in this list as for parameter IN. The nth item in this list will be the extracted spectra for the nth file in IN.

TITLE

Value for the title of the output NDF. A null value (!) will cause the title of the input NDF to be used. [!]

Source comments:

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