Subject: 3.5m Night Log 20190417
From: mcmillan@apo.nmsu.edu
Date: Thu, 18 Apr 2019 09:48:13 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, April 17, 2019
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
J.Wisniewski      J.Wisniewski & class  TSPEC          --:--   --:--
T.Murphy          R.McMillan            APOLLO         --:--   --:--
K.Kinemuchi       K.Kinemuchi           ECHELLE        --:--   --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
OU01/R     19:43   00:10    0   4.5   0    0   0.0  0.0   0    0
AP01/R     00:10   01:10    0   1.0   0    0   0.0  0.0   0    0
NM07/R     01:10   06:22    0   5.2   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
During the day we got about 4 inches of heavy wet snow, including significant accumulation on rooftops.  Although the airtemp remained above freezing and I ran the roof heaters, I was pretty sure the snow on the dome was at best reduced to slush which I really didn't want on the telescope.  And so, even though the sky cleared and humidity dropped (a little) during second half, I didn't think it was safe to open the dome.
Dome parked facing south for maximum sunshine.  Roof heaters are still on.  NICFPS is mounted in prepartion for tomorrow.
                    ------- 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    30    31     20   300  (WNW)          cloudy     snow
     17:00    31    31     19   303  (WNW)          cloudy     snow
     18:00    32    32     21   305   (NW)          cloudy     snow
     19:00    33    32      7   353    (N)          cloudy   lt snow
     20:00    33    32     18   335  (NNW)          cloudy   lt snow
     21:00    33    32     17    23  (NNE)          cloudy     fog
     22:00    33    32     14   358    (N)        mstly clr    fog
     23:00    33    32     29    17  (NNE)         ptly cldy   fog
     00:00    34    32     27    24  (NNE)         ptly cldy  humid
     01:00    37    31     27    18  (NNE)        mstly clr    none
     02:00    37    31     17    30  (NNE)           clear     none
     03:00    37    30     24    12  (NNE)           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