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Timing and Data Acquisition System for a Field Astrolabe

Published online by Cambridge University Press:  04 August 2017

Carl F. Lukac ,
Paul J. Wheeler ,
Richard E. Keating  and
Randolph T. Clarke
Carl F. Lukac
Affiliation:
U. S. Naval Observatory, Washington, D. C. 20390
Paul J. Wheeler
Affiliation:
U. S. Naval Observatory, Washington, D. C. 20390
Richard E. Keating
Affiliation:
U. S. Naval Observatory, Washington, D. C. 20390
Randolph T. Clarke
Affiliation:
U. S. Naval Observatory, Washington, D. C. 20390

Abstract

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The Danjon Astrolabe at the Naval Observatory has been traditionally used to determine Universal Time and improve the systematic accuracy of star positions. During the past year, it has been used to determine latitude and longitude at remotely scattered sites for geodetic purposes. Operating this instrument away from the Observatory necessitated a mobile support and timing system rugged enough to operate dependably in ever changing, and sometimes harsh, environmental conditions.

This paper describes the performance of the astrolabe timing and data acquisition system, gives engineering design considerations, and describes the equipment and instrumentation.

Type
VI. Transit Circles and Astrolabes
Information
Symposium - International Astronomical Union , Volume 109: Astrometric Techniques , 1986 , pp. 397 - 406
Copyright
Copyright © Reidel 1986 

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