Subject: 3.5m Night Log 20200721
From: trudyk@apo.nmsu.edu
Date: Wed, 22 Jul 2020 11:03:13 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, July 21, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
JH02  S.Cheng           S.Cheng
UW06  M.Graham          M.Graham
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
JH02  DIS            20:18   23:12
UW06  DIS            --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
JH02/R      20:18  01:10    2.0  0    0    0   1.8  1.1   0    0
UW06/R      01:10  06:02    4.9  0    0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Rudyk
Evening started partly cloudy, and the rain on the radar was far enough away we could risk an opening. Dust levels were borderline high. It was partly cloudy, seeing was poor. Winds were calm. Clouds thickened by around 23:00 it was overcast. Radar returns began to pop up so we closed at 23:12. Rain kept popping up very close to us in the south and the west until it was time to call it. We did not open again.
                    ------- 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
--------------------------------------------------------------------------
 20:43 dcamera    552( 1103) 159  59  14.9 16.6 17.4 16.2 15.2   -  1.61
 21:38 dcamera    596( 1089) 171  62  14.3 15.3 16.4 14.9 14.6   -  1.91
         ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    62    33     13    94    (E)   4822  ptly cldy   none
     17:00    61    33     14    84    (E)   5824  ptly cldy   none
     18:00    63    35      9    87    (E)   5693  ptly cldy   none
     19:00    61    33     14    66  (ENE)   5150  ptly cldy   none
     20:00    59    30     14    84    (E)   5204  ptly cldy   none
     21:00    59    30     10    87    (E)   5179  ptly cldy   none
     22:00    58    28     10    89    (E)   3499 mstly cldy   none
     23:00    57    30     12    90    (E)   3487   cloudy     none
     00:00    57    32     14    85    (E)   3215   cloudy     none
     01:00    57    31     12   114  (ESE)   2588   cloudy     none
     02:00    58    30     13   124   (SE)   2757   cloudy     none
     03:00    56    29      2   239  (WSW)   2725 mstly cldy   none
     04:00    56    31      6   181    (S)   3551   cloudy     none
     05:00    55    28      8   182    (S)   3168   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.
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