Subject: 3.5m Night Log 20200228
From: mcmillan@apo.nmsu.edu
Date: Sat, 29 Feb 2020 12:50:19 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Friday, February 28, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW01  S.Hawley          G.Stefansson
JH05  K.Schlaufman      K.Schlaufman
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW01  ARCTIC         21:30   23:58
JH05  ECHELLE        00:03   02:34
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW01/R      18:08  00:10    0   3.4   0    0   1.5  1.2   0    0
JH05/R      00:10  06:23   3.8   0    0    0   2.4  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
We had thick clouds with radar echoes at the start and end of the night, with a period of thin-to-medium clouds in between.  Both programs got some data but neither got a lot.  Everything worked well.
And then of course it cleared up right at twilight... but the radar echoes were beginning to look more believable around then, anyway.
                    ------- 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
--------------------------------------------------------------------------
 21:38 arctic   463(  622) 173  51   2.3  4.3  5.4  4.0  2.7   SDSS_i  1.63
 00:13 ecamera    419( -641) 260  69   2.6  2.0  3.0  2.2  2.2   ND3  0.87
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    42     5     10   211  (SSW)    316 mstly cldy   none
     17:00    41     7      7   227   (SW)    386 mstly cldy   none
     18:00    38    -2      7   183    (S)    243 mstly cldy   none
     19:00    38    -4      8   185    (S)    188 mstly cldy   none
     20:00    38    -5     10   184    (S)    144 mstly cldy   none
     21:00    38    -5     12   182    (S)    135  ptly cldy   none
     22:00    37    -1     14   164  (SSE)    309  ptly cldy   none
     23:00    38    -5     18   181    (S)    434  ptly cldy   none
     00:00    36    -6     13   186    (S)    630 mstly clr    none
     01:00    37    -2     18   195  (SSW)    422  ptly cldy   none
     02:00    36     2     12   185    (S)    503 mstly cldy   none
     03:00    36    -1     12   206  (SSW)    462 mstly cldy   none
     04:00    36    -1     12   202  (SSW)    380 mstly cldy   none
     05:00    37    -1     13   218   (SW)    430 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.
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