Subject: 3.5m Night Log 20211204
From: mcmillan@apo.nmsu.edu
Date: Sun,  5 Dec 2021 13:43:40 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, December 04, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
FG02  D.Buzasi          D.Buzasi
GS01  D.Michael         M.Crenshaw,B.Meena,J.Falcone
                         ON-SKY
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
FG02  DIS            19:45   21:00
FG02  DIS            21:25   23:58
GS01  KOSMOS         00:18   05:46
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
FG02/R      17:06  00:10   3.0  0.4   0    0   3.7  0.4   0    0
GS01/R      00:10  06:42    0    0    0    0   6.5  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
Medium to heavy clouds with some radar blips kept us closed at the start of the night.  We opened for a nice hole in the clouds, then closed when the clouds came back.  After that the radar was less worrisome so we remained open through some more waves of clouds, but I did count some extra time lost because sometimes it wasn't possible to get data.
Second half was mostly clear with moderate seeing, and everything worked fairly well.
                    ------- 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
--------------------------------------------------------------------------
 19:50 dcamera    464(  752) -31  48   5.1  5.3  5.5  5.3  5.0   -  1.26
 21:33 dcamera    464(  737) -61  34   5.9  4.8  5.1  4.8  5.2   -  1.67
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    42    15      9   206  (SSW)    379 mstly cldy   none
     17:00    40    19      9   214   (SW)    556 mstly cldy   none
     18:00    40    18      8   251  (WSW)    431 mstly cldy   none
     19:00    42    17     10   261    (W)    198 mstly cldy   none
     20:00    41    19      7   270    (W)    186  ptly cldy   none
     21:00    42    18      8   268    (W)    182  ptly cldy   none
     22:00    40    18      9   267    (W)    155  ptly cldy   none
     23:00    42    10     13   288  (WNW)    164 mstly clr    none
     00:00    41    12     10   324   (NW)    203    clear     none
     01:00    42    12     14   298  (WNW)    128    clear     none
     02:00    41    13     12   277    (W)    200    clear     none
     03:00    40    13     13   296  (WNW)    225    clear     none
     04:00    39    12     16   301  (WNW)    209    clear     none
     05:00    38    11     12   305   (NW)    258    clear     none
     06:00    40     8     15   309   (NW)    260    clear     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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