Subject: 3.5m Night Log 20230403
From: mcmillan@apo.nmsu.edu
Date: Tue,  4 Apr 2023 11:30:52 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, April 03, 2023
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
LA01  M.Hoffmann        M.Hoffmann,D.Thompson,R.Hill
CU03  A.Kowalski        G.Stefansson
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
LA01  HSAR           22:00   00:54
CU03  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
LA01/R      19:33  01:10    0   2.7   0    0   0.0  2.9   0    0
CU03/R      01:10  06:39   0.4  5.1   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
We had high winds but (surprisingly) not high dust.  For a few hours during first half, the wind did dip down near or below the limit, so we were able to use the time to adjust pointing and alignment for the visiting instrument.  But before changeover the wind rose again so I closed the dome.
The only target for the second-half program was in the same direction as the wind, so even when it dropped down slightly below the limit, it wasn't possible to point there.
                    ------- 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                 36   249  (WSW)   2293    clear     none
     17:00                 30   257  (WSW)   2520    clear     none
     18:00                 27   257  (WSW)   3292    clear     dust
     19:00                 36   269    (W)   2476    clear     none
     20:00                 28   259    (W)   3232    clear     none
     21:00                 31   262    (W)   1679    clear     none
     22:00                 30   257  (WSW)   1619    clear     none
     23:00                 33   252  (WSW)   1622    clear     none
     00:00                 23   231   (SW)   1726    clear     none
     01:00                 36   240  (WSW)   1989    clear     none
     02:00                 32   242  (WSW)   2147    clear     none
     03:00                 24   244  (WSW)   2350    clear     none
     04:00                 29   240  (WSW)   2911    clear     dust
     05:00                 23   236   (SW)   2975    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.
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