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 ----------------------------------------------------------------------------- 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 APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 104 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO