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HET time use statistics

Time use statistics

   Average statistics for how time is spent between 18-deg twilights at night




The plot below shows the average time lost to weather each month. The data from 2017 onward are the finest-grained and most representative of our current operations. Overall from 2019-2023 our average time lost to weather was ~41%.
(in board meeting folder of plots)






The plot below shows the breakdown of time spent *after* removing idle time due to weather and engineering time.














Monthly averages:

average of all data below from: 2017-04-01 to 2023-12-31 (civil)


Idle
%
Stack
%
Problems
%
Engineering
%
Science
exposures
%
Science
overhead
%
Jan
43.7
3.1
3.5
5.7
31.1
12.9
Feb
48.7
2.8
2.9
7.2
26.7
11.8
Mar
46.1
2.7
3.2
15.9
22.8
9.3
Apr
35.1
3.5
2.8
13.4
32.1
13.2
May
37.9
3.9
2.4
12.0
30.5
13.2
Jun
40.7
4.9
3.6
10.3
27.2
13.2
Jul
42.2
3.8
2.2
13.6
26.1
12.2
Aug
45.6
3.7
3.5
8.3
26.7
12.1
Sep
44.5
2.7
3.8
8.3
28.7
11.9
Oct
36.6
2.6
3.0
14.2
30.1
13.4
Nov
40.7
2.8
3.5
7.4
31.2
14.5
Dec
43.3
2.7
2.5
4.4
32.6
18.7
ALL
42.2
3.2
3.2
10.2
28.5
12.7


Note: "Idle" includes:
   poor weather (clouds, rain, wind speed, work-downwind, seeing, humidity, etc)
   queue hole


See full listing of monthly time use here









Last updated: Wed, 17 Jan 2024 16:35:59 +0000 stevenj



Observing Status

Night Reports and Schedules

Observing Statistics

Time use statistics

Monthly observing statistics

Target acquisition statistics

Sky quality statistics

verification of probe metrology data

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