A procedure for the extraction of airglow features in the presence of strong background radiation

Details A procedure for the extraction of airglow features in the presence of strong background radiation A procedure for the extraction of airglow features in the presence of strong background radiation

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9515227s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Sept. 1, 1990, p. 15227-15241.

Physics

6

Airglow, Background Radiation, Emission Spectra, Spectral Signatures, Twilight Glow, Computer Programs, Fortran, Line Spectra, Luminous Intensity, Signal To Noise Ratios, Vax Computers

Scientific paper

A technique is developed that can be used to derive the total intensity of band emissions from twilight airglow measurements when the basic spectral signature of the band to be considered is known. The method is designed to automatically extract total band or line intensities of a signal imbedded in background radiation several orders of magnitude greater in brightness. It is shown that the technique developed can reliably measure the intensity of both weak and strong band and line emissions in the presence of strong twilight background radiation. The method of extraction is shown as part of a general purpose spectral analysis program written in VAX FORTRAN. This extraction procedure has been used successfully on emissions of Fel, Ca(+), N2(+) (1N) (0-0) and (0-1), OH in the near UV. OI red (630nm) and green (558nm) lines in the visible, and the OH Meinel bands and O(+) (2P) 732 nm in the near IR.

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