Efficient scheduling of astronomical observations - Application to the CARMENES radial-velocity survey

A. Garcia-Piquer; J. C. Morales; I. Ribas; J. Colomé; J. Guàrdia; M. Perger; J. A. Caballero; M. Cortés-Contreras; S. V. Jeffers; A. Reiners; P. J. Amado; A. Quirrenbach; W. Seifert

doi:10.1051/0004-6361/201628577

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Volume 604 (August 2017)

A&A, 604 (2017) A87

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Table 4

CAST parameters and mean values of the metrics.

CAST parameters^a

Days planned	1096
Total targets	309
Total observable time	10 703.05 h
Unfavorable weather time	4300.23±88 h
Available time for	59.82±0.82%
observations^b^f	(6402.81 h)
Execution time of CAST	23.85±0.11 h

Metrics

Planned targets^c	100±0%
Observations done	20 827±293
Working time^d^f	99.05±0.06% (6342.03 h)
Tracking time^e^f	84.18±0.03% (5338.77 h)
Overhead time^e^f	15.82±0.03% (1003.22 h)

Notes.

^(a)

The uncertainties are computed as the standard deviation of 50 random trials.

^(b)

Ratio of time available for observations, excluding bad weather time.

^(c)

Percentage of the targets that are planned.

^(d)

Ratio of time with scheduled telescope operations with respect to the available time for observations.

^(e)

Ratio of time with respect to the working time.

^(f)

The number of hours is indicated in parentheses.

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