Sky background measurements in the 4800-5800-A region at the latitude of the polar cleft

Details Sky background measurements in the 4800-5800-A region at the latitude of the polar cleft Sky background measurements in the 4800-5800-A region at the latitude of the polar cleft

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apopt..17.2594h&link_type=abstract

Applied Optics, vol. 17, Aug. 15, 1978, p. 2594-2598.

Physics

Optics

Atmospheric Radiation, Auroras, Background Radiation, Light Scattering, Rayleigh Scattering, Airglow, Atmospheric Windows, Monte Carlo Method, Ozone, Sky Brightness, Sunlight, Winter

Scientific paper

At the longitude of Scandinavia, the dayside auroral emissions within the polar cleft can be measured continuously in midwinter. The intensity of the Rayleigh-scattered sunlight is measured to be about 100 R/A at 4860 A when the solar depression angle is 10 deg and to increase rapidly with decreasing solar depression angle. The effect of scattering vanishes around solar depression angle of 14 deg, and the intensity of the sky background can be as low as 2 R/A or 3 R/A. Absolute measurements of auroral emissions for solar depression angles smaller than 14 deg require separate observations of the sky background.

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