The JCMT Newsletter Number 11 (Weather/Fault Statistics)
 Weather and Fault Statistics for Semester 97B
The following tables present the weather loss and fault loss for semester 97B.
A more detailed description of how these tables are created is also available
here.
Month Avail Extend Primary % Backup %
Hrs Hrs Loss Loss
August 496.0 29.3 13.0 2.6 6.0 1.2
September 472.0 18.1 64.5 13.7 50.5 10.7
October 488.0 12.7 50.2 10.3 50.2 10.3
November 480.0 19.0 116.0 24.2 98.5 20.5
December 456.0 16.3 0.0 0.0 0.0 0.0
January 488.0 42.0 34.0 7.0 32.0 6.6
Total 2880.0 137.4 277.7 9.6 237.2 8.2
Table 1: JCMT weather statistics.
Month Avail Total ANT INS COMP SOFT CAR OTH
August 496.0 28.9 0.1 14.7 10.4 2.4 0.0 1.3
September 472.0 20.2 0.7 14.4 1.6 2.5 0.0 1.1
October 488.0 59.7 5.2 43.1 2.8 8.1 0.6 0.0
November 480.0 21.3 0.2 14.9 3.5 2.4 0.0 0.3
December 456.0 64.3 0.5 55.9 0.0 7.0 0.0 0.9
January 488.0 74.9 5.1 44.1 0.0 2.2 0.0 23.6
P(hrs) 2880.0 269.3 11.8 187.1 18.3 24.6 0.6 27.2
B(hrs) 13.0 0.0 1.3 0.0 0.0 0.0 11.8
Table 2: JCMT fault statistics. Wherever possible the faults are categorised into ANT = antenna; INS = instrument; COMP = computer hardware; SOFT = software; CAR = carousel; with the remainder going to OTH = other. The figures in the table m
ay not appear to add up correctly due to rounding in the original program. P defines the time lost from Primary projects.
The category B(hrs) is the time lost to Backup projects.
Modification Author: Graeme Watt (gdw)
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