Subject: 3.5m Night Log 20181201
From: mcmillan@apo.nmsu.edu
Date: Sun,  2 Dec 2018 12:23:15 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, December 01, 2018
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
P.Gaulme          D.Chojnowski          ECHELLE        17:13   17:25
M.Prescott        M.Prescott            DIS            20:45   22:15
M.Skrutskie       O.Fox                 TSpec          --:--   --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
NM02/R     17:06   20:06   2.0   0   1.0   0   0.0  0.0   0    0
NM04/R     20:06   00:10   2.6   0    0    0   1.5  0.0   0    0
UV01/R     00:10   06:40   1.8  4.7   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
Weather was somewhat iffy at sunset, with patchy low clouds and a threat of rising humidity.  I thought we would be able to get some work done, but unfortunately we had pointing issues due to a tertiary mirror rotation problem.  I struggled with this for a while, and in the meantime the humidity got too high, so as a result the first program didn't get any observations.
I watched the humidity and clouds for a while longer, and when there was a lull I decided to take a chance to confirm that pointing was all right now.  The second observer was able to get a couple of targets before thick clouds took over.
Not long after midnight it started to snow.  I ran the snow program to minimize accumulation on the dome, but there was no hope of further sky time for the rest of the night.
                    ------- FAILURE LOG -------
PROG   INST   FAILURE MODE     TIME
    (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
NM02  E          T/H      17:15   18:15  Tertrot needs remap?
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 17:25 ecamera    754( -415) 252  66  -2.2 -0.4  0.0 -0.3 -1.6   ND1  1.45
 20:51 dcamera    802(  378) 268  44  -3.7 -2.7 -1.4 -2.9 -3.5   -  1.99
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    32    20     12   244  (WSW)    245  ptly cldy   none
     17:00    29    20     15   251  (WSW)    188 mstly clr    none
     18:00    27    22     17   257  (WSW)         ptly cldy   none
     19:00    26    22     14   249  (WSW)         ptly cldy  humid
     20:00    26    22     17   259    (W)        mstly clr   humid
     21:00    25    21     13   271    (W)        mstly clr   humid
     22:00    26    18     21   268    (W)        mstly cldy   none
     23:00    26    20     15   270    (W)          cloudy     none
     00:00    27    20     19   262    (W)          cloudy     none
     01:00    27    21     16   273    (W)          cloudy   lt snow
     02:00    26    24     19   268    (W)          cloudy   lt snow
     03:00    25    24     15   266    (W)          cloudy   lt snow
     04:00    26    25     14   276    (W)          cloudy   lt snow
     05:00    26    25     21   267    (W)          cloudy     none
     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.
                          TELESCOPE STATUS
    Telescope drives operational. Current TCC version: 1.2.4
    Current TUI version: 2.6.0