Subject: 3.5m Night Log 20201214
From: mcmillan@apo.nmsu.edu
Date: Tue, 15 Dec 2020 13:20:03 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, December 14, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW07  S.Anderson        S.Anderson,J.Ruan,S.Demasi
JH03  Q.Wang            Q.Wang
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW07  DIS            17:35   20:45
JH03  DIS            --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW07/R      17:07  00:10   3.1  0.1   0    0   3.8  0.0   0    0
JH03/R      00:10  06:50    0    0    0    0   6.7  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
We had clouds and threat of snow just before sunset, but it improved right around sunset and we were able to open not too late.  But then we struggled with gusty winds, and returning clouds, and returning snow threat.  After I closed, there were more high winds, clouds, and high humidity.  Finally the precip sensor went off close to morning twilight, so it seemed time to call the night.
                    ------- 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
--------------------------------------------------------------------------
 18:49 dcamera    594(  362) 275  70  -0.7  0.0  0.4  0.0 -0.4   -  1.82
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    32     9     11   237  (WSW)    306 mstly cldy   none
     17:00    32     7     13   245  (WSW)    396  ptly cldy   none
     18:00    31     6     19   244  (WSW)    472  ptly cldy   none
     19:00    31     8     19   252  (WSW)    348  ptly cldy   none
     20:00    30     9     21   252  (WSW)    541 mstly cldy   none
     21:00    27    13     20   238  (WSW)    872   cloudy     none
     22:00    26    11     24   248  (WSW)   1606   cloudy     none
     23:00    26    12     37   254  (WSW)    786   cloudy     none
     00:00    22    12     22   269    (W)    614   cloudy     none
     01:00    20    13     23   287  (WNW)    671 mstly cldy   none
     02:00    18    15     15   339  (NNW)          cloudy    humid
     03:00    17    12      3   337  (NNW)          cloudy    humid
     04:00    16    12      2   207  (SSW)          cloudy    humid
     05:00    15    13     16   348  (NNW)          cloudy    humid
     06:00    15    14      7   359    (N)          cloudy    humid
     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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