Subject: 3.5m Night Log 20201210
From: cgray@apo.nmsu.edu
Date: Fri, 11 Dec 2020 12:32:28 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Thursday, December 10, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW05  B.Williams        D.Bizyaev
UV04  T.Thuan           Y.Izotov
WY02  J.McLane          J.McLane
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW05  DIS            --:--   --:--
UV04  DIS            --:--   --:--
WY02  TSPEC          --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW05/R      17:06  00:10   7.1  0.0   0    0    0    0    0    0
UV04/R      00:10  04:30   3.2  1.2   0    0    0    0    0    0
WY02/R      04:30  06:47   0.0  2.3   0    0    0    0    0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
Snow storm? What snow storm. We didn't get any snow or rain or sleet. We did get a lot of fog that lasted most of the night and then was in and out for B half with humidity basically be 100% the entire night. Winds were high at the beginning of the night. All in all, there was no hope of opening tonight.
I pointed the dome south just in case the freezing fog built up any ice on the dome.
No problems tonight.
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    34    32     29   246  (WSW)          cloudy     fog
     17:00    33    32     28   245  (WSW)          cloudy     fog
     18:00    33    32     29   253  (WSW)          cloudy     fog
     19:00    32    32     31   239  (WSW)          cloudy     fog
     20:00    32    32     23   263    (W)          cloudy     fog
     21:00    30    31     23   276    (W)          cloudy     fog
     22:00    30    31     16   262    (W)          cloudy     fog
     23:00    29    29     15   276    (W)          cloudy     fog
     00:00    29    29     13   285  (WNW)          cloudy     fog
     01:00    28    28     11   282  (WNW)          cloudy     fog
     02:00    28    27     11   336  (NNW)           clear    humid
     03:00    28    28     13   289  (WNW)           clear    humid
     04:00    27    27      9   326   (NW)          cloudy     fog
     05:00    27    28     15   313   (NW)          cloudy     fog
     Note: the wind was coming from the azimuth listed.
     The convention used is north=0 degrees, east=90 degrees.
     The dust count is particles > 1u per 0.1 cubic feet.
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