Operative control and the study of limb division corrections

Details Operative control and the study of limb division corrections Operative control and the study of limb division corrections

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986kfnt....2...47g&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 2, Nov.-Dec. 1986, p. 47-50. In Russian.

Astronomy and Astrophysics

Astronomy

2

Astrometry, Limbs, Numerical Control, Diameters, Instrument Errors

Scientific paper

The most appropriate formulas for circle reading with a well-studied limb are presented and analyzed with consideration given to the characteristics and capabilities of a computer-controlled meridian circle. A procedure for operative control and calculation of microscope orientation is proposed which is based on the detailed analysis of the difference in angles between diameters. In addition, a method for the operative determination of limb diameter corrections through 6 or 3 degrees is developed for computer-controlled meridian circles. Using a rosette with a 42 deg angle, corrections to the 6 deg diameters of the Pulkovo Horizontal Meridian Circle are determined in the +20 to -18 C temperature range. The random component of the diameter's position is + or - 0.04 arcsec; systematic component corrections in the circle reading do not exceed 0.1 arcsec.

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