SUGGESTION FOR MEASUREMENT OF REFRACTION

Robert W. Byerly

Peer Reviewed

Abstract:	The discrepancy between observational measurements of refraction (1) and the results of the Garlinkel and similar refraction theories is explained by G.M. Clemence (2) on the basis of irradiation effects. He points out that irradiation-the spreading of the image of a bright area on the retina of the eye-causes an apparent depression of the visible horizon, an apparent depression of the lower limb of the sun or moon and an apparent raising of the upper limb of the sun or moon. Irradiation effects of one sort or another are, therefore, to be expected in all marine sextant observations and in bubble sextant observations of the sun or moon.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 3, Number 5
Pages:	169 - 171
Cite this article:	Byerly, Robert W., "SUGGESTION FOR MEASUREMENT OF REFRACTION", NAVIGATION: Journal of The Institute of Navigation, Vol. 3, No. 5, 1952, pp. 169-171.
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