Subject: 3.5m Night Log 20230118
From: ajt@apo.nmsu.edu
Date: Thu, 19 Jan 2023 11:54:05 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, January 18, 2023
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
JH02  R.Angulo          R.Angulo
OU01  M.Schutte         G.Stefansson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
JH02  ARCTIC         --:--   --:--
OU01  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
JH02/R      17:31  00:10   6.7   0    0    0   0.0  0.0   0    0
OU01/R      00:10  06:56   4.9  1.9   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
We were not able to open tonight due to snow and ice on the enclosure roof and lightning arrestors.
Reset mirrors at checkout.
The stripchart mac froze around 21:00 and had to be restarted.
It was completely overcast at sunset but cleared up after a few hours. However, even if not for the snow and ice on the dome, we would have been closed due to humidity most of the night.
Temperatures of about -8C to -10C with 90-100% humidity for most of the night, dropping down to around 75% after 04:00.
                    ------- 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
--------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00                 13   292  (WNW)          cloudy    humid
     17:00                 15   261    (W)          cloudy    humid
     18:00                 11   267    (W)        mstly cldy  humid
     19:00                  7   281    (W)        mstly clr   humid
     20:00                  7   317   (NW)        mstly clr   humid
     21:00                  9   331  (NNW)           clear    humid
     22:00                  9   358    (N)           clear    humid
     23:00                 14   355    (N)           clear    humid
     00:00                 26    30  (NNE)           clear    humid
     01:00                 11    31  (NNE)           clear    humid
     02:00                 15    45   (NE)           clear    humid
     03:00                 18    19  (NNE)           clear    humid
     04:00                 24   324   (NW)           clear    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.
              ----------  TELESCOPE SOFTWARE  ----------
Current TCC version: 1.4.2
Current HUB version: v20171231_01
Current TUI version: 2.6.0