Research Article
Nov 1971
Reliability of Refraction in Polar Astronavigation
Publication: Journal of the Surveying and Mapping Division
Volume 97, Issue 2
Abstract
The use of radiosonde data offers the possibility of overcoming restrictions imposed by the polar environment and of establishing the reliability of existing refraction tables for use in the Arctic and Antarctic. Analysis of limited radiosonde data from the Arctic indicates that with the exception of extremely large zenith angles there exists a high degree of correlation between the actual refraction and refraction values obtained from radiosonde data. Navigators and surveyors operating in the polar regions are often forced to rely on solar observations for their position determinations. The inherently large zenith angles and the resulting large refraction corrections associated with such observations have led many people to question the reliability of positions determined by such means. Reduction of radiosonde data from Thule Air Base, Greenland for a 7-week summer period shows a high degree of reliability for the refraction corrections.
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Published In
Journal of the Surveying and Mapping Division
Volume 97 • Issue 2 • November 1971
Pages: 165 - 171
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Nov 1971
Published online: Feb 12, 2021
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Authors
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Gerald W. Johnson, M.ASCE
Asst. Prof. of Civ. Engrg., Univ. of Minnesota, Minneapolis, Minn.
James L. Clapp, M.ASCE
Assoc. Prof. of Civ. Engrg., Univ. of Wisconsin, Madison, Wisc.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
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