A New Definition of Dark, Grey and Bright Time at ING

Details A New Definition of Dark, Grey and Bright Time at ING A New Definition of Dark, Grey and Bright Time at ING

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ingn....6...38s&link_type=abstract

The Newsletter of the Isaac Newton Group of Telescopes (ING Newsl.), issue no. 6, p. 38-40.

Physics

Observing Time Allocation, Moon Visibility

Scientific paper

The legacy method used to define dark, grey and bright time at ING is based on the fraction of the night for which the Moon is below the horizon. Although this is perfectly adequate for characterising dark time, it is less so for characterising grey and bright time. As the Moon ages the focus should change to quantifying the enhanced sky surface brightness from scattered moonlight.

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