Subject: 3.5m Night Log 20220918
From: mcmillan@apo.nmsu.edu
Date: Mon, 19 Sep 2022 11:11:41 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, September 18, 2022
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW02  S.Tuttle          S.Tuttle
AP01  S.Merkowitz       R.McMillan
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW02  ARCTIC         --:--   --:--
AP01  APOLLO         --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW02/R      19:14  05:41   5.4  5.0   0    0   0.0  0.0   0    0
AP01/R      05:41  06:41    0   1.0   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
We had a thunderstorm at the start of the night, followed by fog and some extremely volatile humidity.  All dewpoint sensors were bouncing up and down on short timescales; there was no reasonable time to open.
                    ------- 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    61    49      8   177    (S)    559   cloudy   lt rain
     17:00    60    47     10   127   (SE)    545   cloudy   lt rain
     18:00    57    49      3   259    (W)    564   cloudy     rain
     19:00    53    52      9   184    (S)    857   cloudy     rain
     20:00    50    48      6   165  (SSE)    560   cloudy     rain
     21:00    50    47     15   144   (SE)          cloudy   lt rain
     22:00    52    46     19   141   (SE)    426   cloudy     fog
     23:00    55    50     13   142   (SE)    518   cloudy     fog
     00:00    55    50     19   154  (SSE)    586   cloudy    humid
     01:00    54    50     22   143   (SE)    564   cloudy    humid
     02:00    56    49     19   172    (S)          cloudy    humid
     03:00    53    50      7   186    (S)    494   cloudy    humid
     04:00    53    51      8   187    (S)          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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