Subject: 3.5m Night Log 20240103
From: mcmillan@apo.nmsu.edu
Date: Thu,  4 Jan 2024 11:41:41 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, January 03, 2024
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW05  C.Chandler        C.Chandler,W.Oldroyd
OU03  K.Leighly         D.Terndrup,J.Choi
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW05  ARCTIC         17:20   23:30
OU03  KOSMOS         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW05/R      17:18  00:10   0.8   0    0    0   6.1  0.0   0    0
OU03/R      00:10  06:57   0.1  6.7   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
The night started out clear with good seeing, but thin clouds showed up, the wind shifted, and then the thin clouds became thick.  The first half program was unable to observe for part of the time even while the dome was open, and the second half program got no data even though I was able to measure focus before the clouds got really thick.
                    ------- 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
--------------------------------------------------------------------------
 17:53 arctic   454(  849)  64  58  -1.7 -0.1 -0.2 -0.6 -1.2   VR  1.05
 20:55 arctic   360(  697) -53  52  -1.4 -1.4 -1.6 -2.1 -1.8   VR  0.90
 00:17 kosmos   375(  659) 133  70  -2.3 -1.3 -1.4 -1.9 -2.1   -  1.80
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    34    17     14   226   (SW)    357    clear     none
     17:00    32    20     13   199  (SSW)    413    clear     none
     18:00    29    22     19   163  (SSE)   1095    clear     none
     19:00    29    22     20   163  (SSE)    667 mstly clr    none
     20:00    29    18     19   177    (S)    444  ptly cldy   none
     21:00    29    19     16   151  (SSE)    363 mstly clr    none
     22:00    30    18     18   167  (SSE)    370  ptly cldy   none
     23:00    32    13     19   181    (S)    298 mstly cldy   none
     00:00    28    18     19   162  (SSE)    388 mstly cldy   none
     01:00    30    17     14   169    (S)    382   cloudy     none
     02:00    32    19     15   199  (SSW)    794   cloudy     none
     03:00    30    20     20   210  (SSW)    823   cloudy     none
     04:00    30    19     20   188    (S)    845   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 SOFTWARE  ----------
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Current HUB version: v20171231_01
Current TUI version: 3.1.3