Subject: 3.5m Night Log 20210324
From: decolib@apo.nmsu.edu
Date: Thu, 25 Mar 2021 11:27:45 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Wednesday, March 24, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN01  B.Ketzeback       D.DeColibus, R.McMillan
NM05  A.Hedlund         P.Gaulme
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN01  AGILE          --:--   --:--
NM05  ECHELLE        --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN01/W      19:26  04:52    0   9.4   0    0   0.0  0.0   0    0
NM05/R      04:52  06:52   1.5  0.5   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: D.DeColibus
Snow! Humidity! Fog! Another night of zero photons!
We did some in-dome engineering and ran the snow program the rest of the time.
AP01 ceded their time (00:10-01:10) well ahead of time, so I removed them from the schedule and gave that time to EN01. It doesn't really matter either way, since we were closed all night.
With a hopeless forecast, we gave up around 05:30. I parked the dome facing south to melt any leftover snow and ice.
For engineering details, see the separate engineering email.
                    ------- 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    24    23     13   264    (W)          cloudy     snow
     17:00    23    23     12   259    (W)          cloudy   lt snow
     18:00    24    23      3   262    (W)         ptly cldy  humid
     19:00    23    21     12   256  (WSW)        mstly clr   humid
     20:00    22    21      9   270    (W)        mstly clr   humid
     21:00    22    21      8   264    (W)        mstly clr   humid
     22:00    22    21     12   269    (W)        mstly clr    fog
     23:00    22    22     10   274    (W)        mstly clr    fog
     00:00    23    22     10   323   (NW)        mstly clr   humid
     01:00    22    22      8   337  (NNW)        mstly clr   humid
     02:00    22    22     14   289  (WNW)           clear    humid
     03:00    22    22     12   325   (NW)           clear    humid
     04:00    21    20      0   240  (WSW)           clear    humid
     05:00    21    20      9   289  (WNW)           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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