Astronomical refraction.

Details Astronomical refraction. Astronomical refraction.

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jhatd..17..279t&link_type=abstract

Johns Hopkins APL Tech. Dig., Vol. 17, No. 3, p. 279 - 284

Astronomy and Astrophysics

Astronomy

6

Refraction: Earth Atmosphere, Models: Earth Atmosphere, Models: Refraction

Scientific paper

Astronomical observations near the horizon have historically been made for naval navigation and for determining the time of sunset. The ray path of the setting or rising Sun can be highly distorted near the horizon, and it is seldom rectilinear. An accurate model of atmospheric refraction must include the observer's altitude as well as range, frequency, and atmospheric pressure and temperature. At infrared through ultraviolet frequencies, refractivity depends strongly on the vertical temperature profile, and an explicit relationship between refractivity and temperature can be obtained. This article describes a refraction model that closely reproduces the profile of the setting Sun.

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