Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996arbei..29...84c&link_type=abstract
Astrophysics Reports, Publications of the Beijing Astronomical Observatory, No. 29, p. 84 - 90
Astronomy and Astrophysics
Astrophysics
Latitude Determination: Micrometers, Errors: Micrometers
Scientific paper
In the end of 1992, the micrometer of the Zenith Telescope (ZTL-180) in Tianjin Latitude Station of Beijing Astronomical Observatory was changed for a new micrometer screw. According to the 139 observations of elongation of circumpolar star times during Dec 28, 1992 to Aug 17, 1993, the screw value is calculated. The analysis of observational data indicates that the maximum error, within the average screw value three circles for different positions of the screw is about 0μ8 which is better than the conditions requested to the manufacturer.
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