Subject: 3.5m Night Log 20200712
From: mcmillan@apo.nmsu.edu
Date: Mon, 13 Jul 2020 11:48:56 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, July 12, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
EN02  B.Ketzeback       R.McMillan
NM03  S.Kovac           S.Kovac,C.Gray
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
EN02  ARCTIC         20:15   20:50
NM03  Echelle        --:--   --:--
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
EN02/W      20:22  03:33   4.2  2.6   0    0   0.5  0.0   0    0
NM03/R      03:33  05:56    0   2.4   0    0   0.0  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
I got some sky flats in the evening before weather closed in, then spent the rest of the night watching clouds and radar while comparing dome flats vs. sky flats with ARCTIC.  Sky flats are definitely superior, which we already knew, but we will need some discussion to decide if dome flats are actually useful.
Every time the clouds thinned, the radar looked more believable.  And when the radar looked probably not real, the clouds were too thick to shoot through.  So no rain, but also no photons for most of the 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
--------------------------------------------------------------------------
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    82    36     14   202  (SSW)    963 mstly clr    none
     17:00    80    38     11   187    (S)    972 mstly clr    none
     18:00    81    38     15   266    (W)   1123 mstly clr    none
     19:00    80    37     12   244  (WSW)    909 mstly clr    none
     20:00    73    31      9   219   (SW)    886  ptly cldy   none
     21:00    72    30     11   195  (SSW)    835  ptly cldy   none
     22:00    71    29      8   238  (WSW)    940  ptly cldy   none
     23:00    71    30      6   207  (SSW)    883  ptly cldy   none
     00:00    71    33      5   351    (N)   3285  ptly cldy   none
     01:00    71    31     10   196  (SSW)   1364  ptly cldy   none
     02:00    71    30      9   190    (S)    871  ptly cldy   none
     03:00    68    29     20   214   (SW)    746  ptly cldy   none
     04:00    68    29      8   199  (SSW)    755 mstly cldy   none
     05:00    68    28     12   213  (SSW)    903 mstly 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.
              ----------  TELESCOPE SOFTWARE  ----------
Current TCC version: 1.2.4
Current HUB version: v20171231_01
Current TUI version: 2.6.0