JCMT Newsletter No. 13 (Weather/Fault Statistics)
 Weather and Fault Statistics for Semester 98B
The following tables present the weather loss and fault loss for semester
98B.
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 20.6 43.7 8.8 3.7 0.7
September 472.0 9.6 16.5 3.5 16.5 3.5
October 480.0 13.0 165.3 34.4 40.3 8.4
November 481.0 18.3 194.6 40.5 147.1 30.6
December 480.0 19.9 194.9 40.6 97.9 20.4
January 488.0 28.6 209.1 42.8 161.1 33.0
Total 2897.0 110.0 824.1 28.4 466.6 16.1
Table 1: JCMT weather statistics.
Month Avail Total ANT INS COMP SOFT CAR OTH
August 496.0 21.9 1.0 10.8 5.7 4.2 0.0 0.3
September 472.0 23.5 2.2 13.9 0.6 5.5 1.3 0.0
October 480.0 21.9 4.9 7.9 0.3 0.4 4.6 3.8
November 481.0 10.8 1.5 6.3 0.0 0.9 0.9 1.3
December 480.0 10.4 0.3 5.9 0.8 0.8 0.5 2.0
January 488.0 29.6 8.0 2.9 16.0 2.8 0.0 0.0
P(hrs) 2897.0 118.1 17.9 47.7 23.4 14.6 7.3 7.4
B(hrs) 10.9 0.5 1.7 1.7 2.9 3.8 0.5
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 may 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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