Subject: 3.5m Night Log 20201218
From: trudyk@apo.nmsu.edu
Date: Sat, 19 Dec 2020 13:53:06 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, December 18, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
AP01  T.Murphy          R.McMillan
DD04  H.Roberts         H.Roberts
NM03  J.Burchett        J.Burchett
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
AP01  APOLLO         17:00   18:05
DD04  DIS            18:12   00:04
NM03  ARCTIC         00:16   06:35
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
AP01/R      17:09  18:09    0    0    0    0   0.0  1.0   0    0
DD04/R      18:09  00:10    0    0    0    0   2.8  3.3   0    0
NM03/R      00:10  06:52    0    0    0    0   6.7  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Rudyk
Evening started clear and calm with bad seeing. Seeing got worse into 21:00. There were strange rain clouds to the north of us that kept heading our way, but never arriving. After midnight, seeing improved to average. We were open all night.
                    ------- 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
--------------------------------------------------------------------------
 18:44 dcamera    508(  249) 265  55  -1.2 -0.7 -0.1 -0.9 -1.0   -  1.40
 20:04 dcamera    495(  202) 247  46  -2.1 -1.6 -1.1 -2.0 -1.9   -  2.05
 00:16 arctic   544(  350) 203  67  -2.8 -3.0 -2.3 -3.0 -2.8   SDSS_i  1.03
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    35    12     11   266    (W)    482    clear     none
     17:00    32     9     12   262    (W)    479    clear     none
     18:00    31     9     12   266    (W)    429    clear     none
     19:00    30     7     12   266    (W)    446    clear     none
     20:00    28     7      9   266    (W)    355    clear     none
     21:00    28     6      1   114  (ESE)    347    clear     none
     22:00    29     8     11    11    (N)    417    clear     none
     23:00    28    10     17    22  (NNE)    428    clear     none
     00:00    27    11     15   358    (N)    401    clear     none
     01:00    27    11      8   358    (N)    332    clear     none
     02:00    27    11     12   333  (NNW)    290    clear     none
     03:00    27    13     14   308   (NW)    318    clear     none
     04:00    25    12      8   351    (N)    318    clear     none
     05:00    26    11     15   313   (NW)    236    clear     none
     06:00    25     8     13   328  (NNW)    176    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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