Measurement of weak airglow emissions with a programmable scanning spectrometer

Details Measurement of weak airglow emissions with a programmable scanning spectrometer Measurement of weak airglow emissions with a programmable scanning spectrometer

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27.1221m&link_type=abstract

Planetary and Space Science, vol. 27, Oct. 1979, p. 1221-1232.

Computer Science

1

Airglow, Auroral Spectroscopy, Ebert Spectrometers, Emission Spectra, Computer Systems Programs, Hydroxyl Radicals, Minicomputers, Optical Scanners, Temperature Effects

Scientific paper

This paper demonstrates how the radiance response of a wavelength-scanning instrument may be improved with a programmable scanning system. A minicomputer with a high-level language offers a versatile software package that can be readily modified for any specific problem. The technique is illustrated with the application of a one-meter spectrophotometer at an airglow facility to the measurements of the peak spectral emissions of the 5200-A doublet of N(2D) in the nightglow and the 7320-A doublet of O(+)(2P) in twilight. Typical measurement errors were + or - 0.2 R and + or - 0.5 R, respectively. This method has also been applied to measurements of the OH rotational temperature from the ratio of the P1(2) and the P1(5) rotational lines in the Meinel 8-3 band, and a precision of + or - 3 K within a time period of 6 min is obtained. The required modifications to the wavelength drive were not extensive, the costs were not high, and the technique may be applied to any wavelength-scanning instrument in operation today.

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