Subject: 3.5m Night Log 20200322
From: cgray@apo.nmsu.edu
Date: Mon, 23 Mar 2020 12:05:20 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, March 22, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
SU01  J.Hughes          J.Hughes
UW08  M.Graham          M.Graham
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
SU01  ARCTIC         19:25   01:02
UW08  DIS            --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
SU01/R      19:25  01:10    0    0    0    0   5.8  0.0   0    0
UW08/R      01:10  06:54   5.7  0.0   0    0    0    0    0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: C.Gray
- gcam needed restart during checkout.
- Arctic has some strange readout during a 900sec  dark in LL mode, similar to what we see when a cosmic ray hits the detector and causes the following rows to be at higher read, but there was no cosmic ray and the noise was actually lower (/export/images/Q1SU01/UT200323/dark900.0001.fits). We took another 900sec dark and it was fine.
The clouds were present all night and, while we were able to punch through them during A half, they got thick right at the start of B half. I wasn't able to focus on a star (even at a magnitude of zero) and there were signs of radar near by so I closed up. Things improved around 5am with radar disappearing but the clouds lingered and we were not able to reopen.
All surfaces and keyboards sprayed down (and not just by the skunks!).
                    ------- 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
--------------------------------------------------------------------------
 19:12 arctic   784( 1030) 132  49   4.2  6.0  6.8  5.3  4.4   sdss-g  1.76
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    47     8     15   251  (WSW)    314  ptly cldy   none
     17:00    45     8     12   266    (W)    345  ptly cldy   none
     18:00    44    11     15   221   (SW)    365  ptly cldy   none
     19:00    41    12     16   236   (SW)    369  ptly cldy   none
     20:00    40    14     14   234   (SW)    434  ptly cldy   none
     21:00    41    11     13   238  (WSW)    481  ptly cldy   none
     22:00    43    10     18   262    (W)    418   cloudy     none
     23:00    43    14     13   243  (WSW)    401 mstly cldy   none
     00:00    43    12     16   264    (W)    456 mstly cldy   none
     01:00    43    11     18   265    (W)    436   cloudy     none
     02:00    42    14     13   259    (W)    464   cloudy     none
     03:00    41    15     16   269    (W)    440   cloudy     none
     04:00    41    14     16   249  (WSW)    417   cloudy     none
     05:00    40    12     14   229   (SW)    401 mstly cldy   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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Current TCC version: 1.2.4
Current HUB version: v20171231_01
Current TUI version: 2.6.0