Subject: 3.5m Night Log 20190102
From: cgray@apo.nmsu.edu
Date: Thu,  3 Jan 2019 14:09:10 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, January 02, 2019
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
P.Nedialkov       P.Nedialkov           DIS            --:--   --:--
D.Chojnowski      D.Chojnowski          ECHELLE        --:--   --:--
C.Gray            C.Gray                Echelle        03:35   06:40
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
UW06/R     17:18   00:10    0    0    0    0   6.9  0.0   0    0
NM04/R     00:10   03:10    0    0    0    0   3.0  0.0   0    0
NM05/R     03:10   06:57   0.4  0.3   0    0   1.3  1.8   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
The night started out looking like we would be able to open, but then a wall of fog and snow came from the west.  We were under freezing fog and light snow for the better half of the night.  However, the humidity dropped suddenly around 3:30am. I checked the roof and found there was almost no snow and I could not see any ice either on either the roof or the lightning arresters and I opened.  I was able to stay open for about 3 hours and then the wind picked up and we had to close.
No problems tonight.
                    ------- 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
--------------------------------------------------------------------------
 03:43 ecamera    703( -771)  42  25  -7.1 -6.9 -5.6 -7.0 -7.0   ND2  1.74
 05:51 ecamera    696( -830)  50  24  -7.4 -8.0 -7.2 -7.9 -7.6   ND5  2.07
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    23    15      7   261    (W)    258 mstly clr    none
     17:00    21    15     11    21  (NNE)         ptly cldy  humid
     18:00    21    16      6    23  (NNE)         ptly cldy  humid
     19:00    20    18     14   359    (N)          cloudy   lt snow
     20:00    20    18      2   338  (NNW)          cloudy   lt snow
     21:00    20    19     14    21  (NNE)          cloudy   lt snow
     22:00    20    19      8   360    (N)          cloudy   lt snow
     23:00    19    17     22    22  (NNE)          cloudy     fog
     00:00    19    16     19    24  (NNE)          cloudy     fog
     01:00    19    15     17    38   (NE)           clear    humid
     02:00    19    16     18    29  (NNE)           clear    humid
     03:00    19    16     21    29  (NNE)           clear     none
     04:00    18     8     21    23  (NNE)           clear     none
     05:00    18    11     18     2    (N)           clear     none
     06:00    19     2     21     5    (N)     80    clear     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