Subject: 3.5m Night Log 20211221
From: ajt@apo.nmsu.edu
Date: Wed, 22 Dec 2021 13:56:12 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, December 21, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
WY03  A.Cavanaugh       A.Cavanaugh
AP01  S.Merkowitz       R.McMillan
CU03  Y.Notsu           Y.Notsu
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
WY03  TSPEC          --:--   --:--
AP01  APOLLO         --:--   --:--
CU03  ARCTIC         00:48   06:42
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
WY03/R      17:10  00:10   2.0  5.0   0    0   0.0  0.0   0    0
AP01/R      00:10  01:10    0   0.2   0   0.8  0.0  0.0   0    0
CU03/R      01:10  06:54    0    0    0    0   0.0  5.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: A.Townsend
We did not open for the first half of the night due to thick clouds and radar which continued through A-half.
The sky began to clear up somewhat a little after midnight, enough to see the moon, but the APOLLO guider (and then all of the other Dome video feeds) stopped loading.
Due to this APOLLO guider failure, AP01 handed over to CU03 early.
Clouds continued to blow through overhead but were thin enough to observe through for the rest of the night.
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
AP01   APOLLO    I/S      00:20   00:48  APOLLO Guider video stream not loading
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 01:01 arctic   304(  752)  78  30   4.0  3.7  4.2  3.5  3.4   ARCTIC_4170  1.96
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    41    -4     17    12  (NNE)    155 mstly cldy   none
     17:00    40    -2      9    39   (NE)    100   cloudy     none
     18:00    40    -6     15    11    (N)     66  ptly cldy   none
     19:00    42   -14     14   340  (NNW)     86 mstly cldy   none
     20:00    43   -14     13   300  (WNW)     91   cloudy     none
     21:00    42    -5     11    36   (NE)     88   cloudy     none
     22:00    43    -3     17    22  (NNE)     75   cloudy     none
     23:00    41    -4      6   342  (NNW)    118   cloudy     none
     00:00    40    -1      9   337  (NNW)    130  ptly cldy   none
     01:00    39     0     12   319   (NW)    134  ptly cldy   none
     02:00    38     1     10   351    (N)    161  ptly cldy   none
     03:00    39     2     11   348  (NNW)    128  ptly cldy   none
     04:00    38     5     10   296  (WNW)    110  ptly cldy   none
     05:00    38    10     13   344  (NNW)    121  ptly cldy   none
     06:00    37    10     18   336  (NNW)     74  ptly 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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