Subject: Yearly weather reports from APO 3.5-m night logs: 1994-1996
From: richmond@astro.Princeton.EDU
Submitted: Sat, 2 Nov 1996 12:27:52 -0500 (EST)
Message number: 104
(previous: 103,
next: 105
up: Index)
Below are short summaries of the weather at APO, as recorded in
the APO 3.5-m Night Logs. I thank the Observing Specialists
for their faithful compilation of the logs, and the quick posting
to the APO WWW site.
Note that the seeing (which is actually the average of all values
from focus frames, reported in the logs) has been getting better
over the years ...
Michael Richmond
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Annual weather statistics for APO 3.5-m: 1994
total number of nights is 157
here comes comes open/close
29 c
128 o
here comes observing hours when enclosure was opened
-2.000000 0
0.000000 11
2.000000 16
4.000000 21
6.000000 29
8.000000 23
10.000000 20
12.000000 6
14.000000 2
16.000000 0
here comes photometric/not
4 d
126 n
27 y
here comes seeing
0.000000 0
0.500000 0
1.000000 6
1.500000 37
2.000000 13
2.500000 8
3.000000 5
3.500000 1
4.000000 0
fraction of nights the telescope opened, per month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0.00 0.00 0.25 0.93 0.85 0.90 0.83 0.00 0.00 1.00 0.73 0.77
Annual weather statistics for APO 3.5-m: 1995
total number of nights is 311
here comes comes open/close
39 c
272 o
here comes observing hours when enclosure was opened
-2.000000 0
0.000000 11
2.000000 28
4.000000 35
6.000000 63
8.000000 66
10.000000 61
12.000000 8
14.000000 0
here comes photometric/not
2 d
231 n
78 y
here comes seeing
0.000000 0
0.500000 0
1.000000 35
1.500000 142
2.000000 59
2.500000 13
3.000000 3
3.500000 1
4.000000 1
4.500000 0
fraction of nights the telescope opened, per month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0.71 0.82 0.97 1.00 1.00 0.89 0.90 0.74 0.90 1.00 1.00 0.70
Annual weather statistics for APO 3.5-m: 1996
total number of nights is 299
here comes comes open/close
56 c
1 n
242 o
here comes observing hours when enclosure was opened
-2.000000 0
0.000000 19
2.000000 26
4.000000 27
6.000000 64
8.000000 47
10.000000 52
12.000000 7
14.000000 0
here comes photometric/not
261 n
38 y
here comes seeing
0.000000 0
0.500000 0
1.000000 64
1.500000 130
2.000000 25
2.500000 6
3.000000 0
3.500000 2
4.000000 0
4.500000 0
5.000000 0
5.500000 1
6.000000 0
fraction of nights the telescope opened, per month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
0.87 0.82 0.75 0.86 1.00 0.70 0.84 0.71 0.83 0.75 1.00 0.00
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