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TitleThe Ottawa photographic zenith telescope; and Method and formulae used in P.Z.T. plate measurement; and A program machine for automatic operation of the Ottawa P.Z.T.
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorThomson, M M; Tanner, R W; Hollinsworth, V E
SourcePublications of the Dominion Observatory, Ottawa vol. 15, no. 4, 1955, 40 pages, Open Access logo Open Access
PublisherCanada Department of Mines and Technical Surveys
Mediapaper; on-line; digital
RelatedThis publication contains the following publications
RelatedThis publication is contained in Publications of the Dominion Observatory, Ottawa, volume XV
File formatpdf
SubjectsScience and Technology; Astronomy; Measurement; Automation
Illustrationsphotographs; drawings; sketches; schematic representations; time series; tables
Released1955 01 01; 2019 09 20
AbstractThe Ottawa photographie zenith telescope, utilizing a 10-inch objective of 14 feet focal length, was first tested in June 1951, and has been operated continuously since October 1951. More than 500 plates have been secured for the purpose of determining fundamental time and variation of latitude. Mean error of a clock correction from a single star is ± ! 027. Mean error of a latitude determination from a single star is ± 0''.29. A description of the Ottawa instrument, methods used for reducing observations, and a discussion of results is presented.

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