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Researches on the Accuracy of the DCMT Circle Reading System

Published online by Cambridge University Press:  07 August 2017

Zhu Zi
Zhu Zi*
Affiliation:
Shaanxi Astronomical Observatory Chinese Academy of Sciences P. O. Box 18, Lintong, Shaanxi P. R. China

Abstract

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The declinations of stars are determined by the circle micrometers on the meridian circle. The determined accuracy of declinations depends on the systematic accuracy of the micrometers. The DCMT (Danish Chinese Meridian Telescope) adopts photoelectric scanning micrometers as the circle reading system. It contains 6 micrometers forming 3 pairs to measure the circle posistion simultaneously. The repeatability of the circle reading and systematic errors of micrometers are discussed in this paper.

Type
Ground-Based Optical Astrometry
Information
Symposium - International Astronomical Union , Volume 156: Developments in Astrometry and their Impacts on Astrophysics , 1993 , pp. 130
Copyright
Copyright © Kluwer 

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