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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 3 — Jan. 20, 2003
  • pp: 354–366

Ray tracing and refraction in the modified US1976 atmosphere

Siebren Y. van der Werf  »View Author Affiliations


Applied Optics, Vol. 42, Issue 3, pp. 354-366 (2003)
http://dx.doi.org/10.1364/AO.42.000354


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Abstract

A new and flexible ray-tracing procedure for calculating astronomical refraction is outlined and applied to the US1976 standard atmosphere. This atmosphere is generalized to allow for a free choice of the temperature and pressure at sea level, and in this form it has been named the modified US1976 (MUSA76) atmosphere. Analytical expressions and numerical procedures are presented for calculating dry-air refractions and for the water-vapor correction. Results for all apparent altitudes are presented and compared with The Star Almanac for Land Surveyors (1951), The Nautical Almanac (1958), and the Pulkovo tables (Refraction Tables of the Pulkovo Observatory, 1985). Dependences on sea-level pressure, temperature, and temperature gradient and on humidity are discussed.

© 2003 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.4030) Atmospheric and oceanic optics : Mirages and refraction
(010.7030) Atmospheric and oceanic optics : Troposphere

History
Original Manuscript: December 10, 2001
Revised Manuscript: March 21, 2002
Published: January 20, 2003

Citation
Siebren Y. van der Werf, "Ray tracing and refraction in the modified US1976 atmosphere," Appl. Opt. 42, 354-366 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-3-354

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