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A precision sidereal telescope drive based on a solar time crystal clock

Drever, R. W. P. and Fruin, J. H. and Jelley, J. V. (1971) A precision sidereal telescope drive based on a solar time crystal clock. Observatory, 91 (984). pp. 203-205. ISSN 0029-7704. http://resolver.caltech.edu/CaltechAUTHORS:20160119-065145261

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Abstract

A requirement arose for a sidereal drive for a small microwave radiometer on an equatorial mount, the equipment to run unattended to a precision of about 2 minutes in hour angle over a 7-day period. The installation already included a solar-time crystal clock based on a IO MHz oscillator (type HCD 25), which through decade scalers could easily be arranged to operate a standard 50 Hz synchronous motor which would drive the mounting at one revolution per solar day. However, no suitable gearing was available to generate the required sidereal rate.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://adsabs.harvard.edu/abs/1971Obs....91..203DADSArticle
Additional Information:© 1971 The Observatory. Provided by the NASA Astrophysics Data System.
Record Number:CaltechAUTHORS:20160119-065145261
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160119-065145261
Official Citation:A precision sidereal telescope drive based on a solar time crystal clock Drever, R. W. P., Fruin, J. H., & Jelley, J. V. The Observatory, Vol. 91, p. 203-205 (1971)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:63734
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:19 Jan 2016 21:47
Last Modified:13 Feb 2019 18:06

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