Subject: 3.5m Night Log 20170120
From: mcmillan@apo.nmsu.edu
Date: Sat, 21 Jan 2017 12:39:43 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, January 20, 2017
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
H.Weaver          C.Lisse,H.Weaver,     ARCTIC         --:--   --:--
                  Y.Fernandez
T.Thuan           Y.Izotov              DIS            --:--   --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
JH02/R     17:34   00:10   6.6  0.0    0    0   0.0  0.0   0    0
UV03/R     00:10   06:55   1.4  5.4    0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
At the start of the night we had heavy clouds and high humidity.  Snow started falling at 8 pm and continued through most of the night.  During the lulls there was still a lot of snow blowing around so that it was hard to tell if it was still falling or not.  Fortunately the power was steady and I was able to run the snow program all night.  By morning there was about 4 inches of accumulation, with more approaching on radar that looks like it might be pretty strong.
I took the chance to do some more characterization tests with ARCTIC.  There was a shutter problem after mounting the instrument but it was easily fixed with a reset.
                    ------- FAILURE LOG -------
PROG   INST   FAILURE MODE     TIME
    (SEDFNVOG)   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    26    24     18   250  (WSW)          cloudy    humid
     17:00    26    25     23   239  (WSW)          cloudy    humid
     18:00    26    24     11   252  (WSW)          cloudy    humid
     19:00    26    24     29   237  (WSW)          cloudy    humid
     20:00    26    24     13   258  (WSW)          cloudy   lt snow
     21:00    25    24     16   256  (WSW)          cloudy     snow
     22:00    25    24     20   210  (SSW)          cloudy     snow
     23:00    25    25     25   209  (SSW)          cloudy     snow
     00:00    26    25     32   212  (SSW)          cloudy     snow
     01:00    26    26     30   209  (SSW)          cloudy   lt snow
     02:00    27    26     27   212  (SSW)          cloudy   lt snow
     03:00    27    26     25   238  (WSW)          cloudy     snow
     04:00    27    26     32   243  (WSW)          cloudy     snow
     05:00    27    26     32   222   (SW)          cloudy     snow
     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: 1.2.2
    Current TUI version: 2.6.0