Subject: 3.5m Night Log 20220114
From: dembicky@apo.nmsu.edu
Date: Sat, 15 Jan 2022 12:58:54 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, January 14, 2022
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
BY04  E.Hintz           E.Hintz, J.Hansen, S.Call, B.Boizelle
UV06  T.Thuan           Y.Izotov
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
BY04  TSPEC          17:28   21:28
UV06  TSPEC          --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
BY04/R      17:28  00:10    0   2.7   0    0   0.0  4.0   0    0
UV06/R      00:10  06:57   1.4  5.4   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: J.Dembicky
Closed at 21:28 due to dust!  Then the humidity rose and kept us closed the rest of the night.
We gave up at 05:30 with the dewpoint depression still over the closure limit.
                    ------- 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
--------------------------------------------------------------------------
 17:44 tcamera    383( 1090) 109  62   4.3  6.5  6.7  6.6  5.9   Ks  1.04
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    41    12     12   350    (N)    240 mstly clr    none
     17:00    41    10     14   306   (NW)    210 mstly clr    none
     18:00    40    11     13   344  (NNW)    330 mstly clr    none
     19:00    38    10     12   355    (N)    197 mstly clr    none
     20:00    37     8     19    45   (NE)    207    clear     none
     21:00    33    10     18    74  (ENE)    442    clear     dust
     22:00    27    18     24    70  (ENE)   8515 mstly clr    dust
     23:00    25    20     29    73  (ENE)        mstly clr   humid
     00:00    24    19     23    61  (ENE)        mstly clr   humid
     01:00    22    19     21    52   (NE)        mstly clr   humid
     02:00    21    17     27    56   (NE)        mstly clr   humid
     03:00    20    17     21    56   (NE)        mstly clr   humid
     04:00    18    17     18    47   (NE)           clear    humid
     05:00    20    15     22    55   (NE)           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.
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