Accession Number ADA575150
Title Experiences with the U.S. Naval Observatory Glass Circles.
Publication Date Oct 1982
Media Count 8p
Personal Author B. L. Klock T. J. Rafferty
Abstract It has been found in the course of U.S. Naval Observatory experience with the circles used to determine the declination position angle of a meridian circle that the quality of glass circle division lines is superior to those of conventional metal circles. ...
Keywords Circles
Photoelectric materials

Source Agency Non Paid ADAS
NTIS Subject Category 82B - Photographic Techniques & Equipment
Corporate Author Naval Observatory, Washington, DC.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1319
Contract Number N/A

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