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JCMT Newsletter No. 14 (Weather/Fault Statistics)

JCMT image here

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.

Modified: 10 March 2000 by Graeme Watt
Contact: Antonio Chrysostomou. Updated: Tue Aug 17 17:32:06 HST 2004

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