JCMT Newsletter No. 13 (Weather/Fault Statistics)
 Weather and Fault Statistics for Semester 99A
The following tables present the weather loss and fault loss for semester
99A.
A more detailed description of how these tables are created is also available
here.
Month Available Extended ---- Lost to weather ----
Primary % Backup %
February 438.5 29.6 104.4 23.8 80.4 18.3
March 464.0 18.0 134.9 28.6 52.9 11.2
April 464.0 15.3 107.4 23.2 47.9 10.3
May 344.0 5.8 120.0 34.9 57.0 16.6
June 464.0 23.8 46.5 10.0 4.0 0.9
July 472.0 34.6 28.8 6.1 12.3 2.6
Totals 2646.5 127.1 542.0 20.5 254.5 9.6
Table 1: JCMT weather statistics.
Month Available Lost ANT INS COM SOF CAR OTH
February 438.5 38.9 3.9 23.7 6.9 0.0 3.4 1.1
March 464.0 24.7 1.3 10.7 7.5 2.3 1.0 2.0
April 464.0 18.4 0.7 7.8 2.3 1.9 0.4 5.5
May 344.0 18.5 0.0 15.6 0.5 0.4 0.0 2.0
June 464.0 177.8 22.0 8.6 1.5 0.6 143.7 1.5
July 472.0 42.1 8.5 16.9 0.6 0.1 8.0 8.0
P(hrs) 2646.5 320.4 36.4 83.3 19.3 5.3 156.5 20.1
B(hrs) 37.7 4.9 11.3 0.8 0.2 20.0 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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