Subject: 3.5m Night Log 20210321
From: mcmillan@apo.nmsu.edu
Date: Mon, 22 Mar 2021 12:45:46 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Sunday, March 21, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
NM08  E.Nielsen         E.Nielsen
UV02  R.Wilson          R.Wilson
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
NM08  ECHELLE        --:--   --:--
UV02  ECHELLE        03:15   04:45
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
NM08/R      19:24  01:10    0   5.8   0    0   0.0  0.0   0    0
UV02/R      01:10  06:56   2.0  1.9   0    0   1.9  0.0   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
First half we had heavy clouds, with some radar and a dust spike for variety.  Second half we had a rapid clearing!  And then just as rapidly it clouded over again.  But there was about 1.5 hours of good data and 20 minutes of futile struggle, so it was better than nothing.
                    ------- 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
--------------------------------------------------------------------------
 02:23 ecamera    184( -757) 208  45   2.7  4.2  5.2  4.1  2.7   ND3  1.45
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    50    20     29   234   (SW)    715   cloudy     none
     17:00    49    20     27   219   (SW)    770   cloudy     none
     18:00    47    14     17   263    (W)   1018   cloudy     none
     19:00    47    17     20   216   (SW)    662   cloudy     none
     20:00    46    18     24   221   (SW)    964   cloudy     none
     21:00    45    17     16   257  (WSW)   1080   cloudy     none
     22:00    43    20     25   247  (WSW)  14002   cloudy     dust
     23:00    42    23     22   235   (SW)  14647   cloudy     dust
     00:00    41    24     24   221   (SW)  10082   cloudy     dust
     01:00    39    23     20   249  (WSW)   2787   cloudy     none
     02:00    38    23     11   260    (W)    786 mstly cldy   none
     03:00    37    20     25   259    (W)    724    clear     none
     04:00    36    17     17   240  (WSW)    939    clear     none
     05:00    35    18     19   237  (WSW)    879 mstly cldy   none
     06:00    33    15     16   258  (WSW)   1138 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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