Subject: 3.5m Night Log 20251014
From: tsutherland@apo.nmsu.edu
Date: Wed, 15 Oct 2025 11:56:49 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, October 14, 2025
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW04  S.Hawley          S.Hawley
UW05  C.Chandler        C.Chandler,M.Frissell,D.Singh
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW04  ECHELLE        --:--   --:--
UW05  ARCTIC         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW04/R      18:39  01:10    6.5    0    0    0   0  0.0   0    0
UW05/R      01:10  06:59    0.3    5.5    0    0   0  0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Sutherland
Restarted dataq at start of the night.
Had to restart the strip charts around 8:30pm. They were all frozen.
Dome camera computers restarted themselves at 9pm and seemed to do updates.
High humidity set the precip alarm off at 8:45pm. High and unstable humidity kept us closed most of the night. Clouds rolled in around midnight and only got worse as the hours progressed.
UW04 gave up at midnight and yeilded the rest of their time to UW05. It was still too humid to open so it doesn't make too much differnece though.
We never opened. Gave up for the night around 5:40am.
                    ------- 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    60    53     13   184    (S)    694    clear    humid
     17:00    59    52     13   195  (SSW)           clear    humid
     18:00    56    53     21   136   (SE)           clear    humid
     19:00    56    52     20   156  (SSE)           clear    humid
     20:00    55    52     21   139   (SE)           clear    humid
     21:00    56    51     24   135   (SE)           clear    humid
     22:00    55    50     17   133   (SE)           clear    humid
     23:00    55    50     18   135   (SE)           clear    humid
     00:00    56    50     22   141   (SE)         ptly cldy  humid
     01:00    55    49     17   156  (SSE)         ptly cldy  humid
     02:00    56    48     15   164  (SSE)         ptly cldy  humid
     03:00    54    48     19   154  (SSE)        mstly cldy  humid
     04:00    54    49     13   179    (S)          cloudy    humid
     05:00    53    49     17   157  (SSE)          cloudy    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.
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