Astronomical Refraction: Computational Method for All Zenith Angles

Details Astronomical Refraction: Computational Method for All Zenith Angles Astronomical Refraction: Computational Method for All Zenith Angles

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aj....119.2472a&link_type=abstract

The Astronomical Journal, Volume 119, Issue 5, pp. 2472-2474.

Astronomy and Astrophysics

Astronomy

13

Methods: Numerical

Scientific paper

It is shown that the problem of computing astronomical refraction for any value of the zenith angle may be reduced to a simple, nonsingular, numerical quadrature when the proper choice is made for the independent variable of integration. The angle between the radius vector and the light ray is such a choice. The implementation of the quadrature method is discussed in its general form and illustrated by means of an application to a piecewise polytropic atmosphere. The flexibility, simplicity, and computational efficiency of the method are evident.

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