The JCMT Newsletter Number 11 (Weather/Fault Statistics)
 Weather and Fault Statistics for Semester 98A
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
February 424.0 58.5 21.0 5.0 15.5 3.7
March 496.0 29.8 12.7 2.6 10.5 2.1
April 480.0 40.3 21.0 4.4 18.5 3.9
May 495.5 22.8 59.3 12.0 19.3 3.9
June 480.0 10.0 67.5 14.1 12.5 2.6
July 496.0 11.3 66.3 13.4 40.3 8.1
Total 2871.5 172.7 247.8 8.6 116.6 4.0
Table 1: JCMT weather statistics.
Month Avail Total ANT INS COMP SOFT CAR OTH
February 424.0 19.1 2.2 9.4 1.7 4.7 1.1 0.0
March 496.0 18.6 9.8 0.9 4.4 3.3 0.0 0.3
April 480.0 8.3 0.1 3.3 0.5 4.3 0.1 0.0
May 495.5 11.6 3.5 3.8 0.5 0.3 0.0 3.5
June 480.0 53.0 2.5 39.4 3.0 7.1 0.0 1.0
July 496.0 16.1 0.3 5.5 5.3 4.9 0.3 0.0
P(hrs) 2871.5 126.7 18.4 62.3 15.4 24.6 1.5 4.8
B(hrs) 3.5 0.0 0.7 0.0 1.3 0.0 1.5
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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