Accurate timekeeping for optical astronomy. I - The ACTS system

Details Accurate timekeeping for optical astronomy. I - The ACTS system Accurate timekeeping for optical astronomy. I - The ACTS system

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103..476c&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, May 1991, p. 476-483.

Astronomy and Astrophysics

Astronomy

Time Measurement, Visual Observation, Astronomical Photometry, Pulsars, Stellar Flares, Stellar Occultation

Scientific paper

The Automated Computer Time Service (ACTS) introduced recently by the National Institute of Standards and Technology provides a convenient, inexpensive, and easy-to-use method of setting a computer clock to within 1 msec of Coordinated Universal Time via commercial telephone lines. The ACTS promises to be very useful in the coordinated observations by amateurs and small observatories of many interesting phenomena, such as occultation of stars by the moon, asteroids, or planets, solar and stellar flares, and timing of pulsars. Four timing circuits implemented using the ACTS to provide accurate time signals to data-acquisition equipment (e.g., photometers and CCD systems) are described, including one that monitors WWV signals for long-term calibration.

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