Subject: 3.5m Night Log 20210206
From: mcmillan@apo.nmsu.edu
Date: Sun,  7 Feb 2021 14:20:00 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, February 06, 2021
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW02  Z.Ivezic          P.Yoachim
UV02  R.Wilson          R.Wilson
WY01  M.Brotherton      J.McLane
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW02  ARCTIC         18:00   20:48
UV02  ECHELLE        20:53   04:59
WY01  TSPEC          05:11   06:34
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW02/R      17:50  20:50    0    0    0    0   3.0  0.0   0    0
UV02/R      20:50  05:05    0    0    0    0   5.6  1.6   0    0
WY01/R      05:05  06:45    0    0    0    0   0.0  1.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: R.McMillan
A beautiful clear night with good seeing almost the whole time, except for a brief period of borderline winds after midnight.  For the rest of the night wind was fairly mild.  Everything worked 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
--------------------------------------------------------------------------
 18:27 arctic   567(  595) -23  47   0.4  1.4  1.8  1.2  0.7   sdss-r  0.88
 21:03 ecamera    521( -607) -105  29   0.1 -0.1  0.6  0.0  0.2   Clear  1.12
 05:20 tcamera    444(  621) 193  68   1.6  0.6  1.1  0.8  1.4   Ks  1.28
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    36   -10      6   314   (NW)    890    clear     none
     17:00    35   -11      3   342  (NNW)    698    clear     none
     18:00    33   -13     10   291  (WNW)   1160    clear     none
     19:00    33   -11     13   281    (W)   1003    clear     none
     20:00    32     0     12   263    (W)   1101    clear     none
     21:00    32    -2     14   243  (WSW)   1011    clear     none
     22:00    32    -1     11   264    (W)    660    clear     none
     23:00    33    -2     15   266    (W)    618    clear     none
     00:00    33     2     18   275    (W)    532    clear     none
     01:00    33     1     19   275    (W)    527    clear     none
     02:00    34    -5     23   273    (W)    397    clear     none
     03:00    34    -1     24   279    (W)    414    clear     none
     04:00    35    -3     27   294  (WNW)    341    clear     none
     05:00    35    -1     23   295  (WNW)    413    clear     none
     06:00    34    -2     25   304   (NW)    352    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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