Subject: 3.5m Night Log 20220718
From: decolib@apo.nmsu.edu
Date: Tue, 19 Jul 2022 11:27:16 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Monday, July 18, 2022
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW05  A.Heinze          A.Heinze
UW07  B.Morris          S.Hawley,L.Hebb
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW05  KOSMOS         --:--   --:--
UW07  ECHELLE        --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW05/R      20:20  01:10   3.6  1.3   0    0   0.0  0.0   0    0
UW07/R      01:10  06:00    0   4.8   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: D.DeColibus
It was too dusty to open at any point tonight; we gave up at morning twilight.
The TR1 mirror cover petal misbehaved a bit during afternoon checkout - it opened about 95% of the way, but didn't latch, so it was not flush with the side walls of the mirror cell. I cycled the mirror covers and it occurred again (both times with the telescope at 10 degree altitude). I slewed up to 80 alt and it opened and closed fine, and then I tried opening/closing at 20 degrees and that was fine too, so the problem only occurred when parked at 10 degrees. We've seen this issue previously with BC1 as well, so the mirror petals that have to work the hardest against gravity seem to be the most affected.
The secondary seemed fine tonight, but I also only used it when we switched instruments once- hardly an exhaustive test.
                    ------- 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    78    43      7   232   (SW)   4294  ptly cldy   dust
     17:00    74    41      1   173    (S)   3376  ptly cldy   dust
     18:00    73    43      1   181    (S)   3557  ptly cldy   dust
     19:00    74    42      2   247  (WSW)   4039  ptly cldy   dust
     20:00    70    40      8   176    (S)   4291 mstly clr    dust
     21:00    68    40     14   175    (S)   5652    clear     dust
     22:00    67    40     15   149  (SSE)   6828    clear     dust
     23:00    66    38     20   139   (SE)   7466    clear     dust
     00:00    66    38     15   129   (SE)   7604    clear     dust
     01:00    65    38     15   133   (SE)   8193    clear     dust
     02:00    63    39      4   105  (ESE)   8374 mstly clr    dust
     03:00    65    38      7   200  (SSW)   6695  ptly cldy   dust
     04:00    67    38      7   221   (SW)   6331  ptly cldy   dust
     05:00    65    38      7   221   (SW)   6802  ptly cldy   dust
     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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