Subject: 3.5m Night Log 20200926
From: trudyk@apo.nmsu.edu
Date: Sun, 27 Sep 2020 12:02:56 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Saturday, September 26, 2020
PROG  PI ASTRONOMER      OBSERVER(S)
--------------------------------------------------------------------
UW08  B.Morris          L.Hebb,S.Hawley
UW07  G.Wallerstein     C.Sakari
                         ACTUAL
PROG  INSTRUMENT     START   FINISH
--------------------------------------------------------------------
UW08  ECHELLE        19:02   01:08
UW07  DIS            01:10   06:00
   PROG       SCHEDULED      WEATH     EQUIP     OBS     NOT USED
 I/ROW/DTN  START  FINISH   D    B    D    B    D    B    D    B
-----------------------------------------------------------------
UW08/R      19:02  01:10    0    0    0    0   0.0  6.1   0    0
UW07/R      01:10  06:47    0    0    0    0.1 3.8  1.7   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Rudyk
Evening started perfectly clear with reasonable winds and good seeing. The seeing, however, declined precipitously after midnight. The NA2 eyelid did not open properly. It was resolved by closing mirror covers then opening them again. We were open all night.
                    ------- FAILURE LOG -------
              FAILURE MODE     TIME
PROG   INSTR     TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
uw07    D        T/H       01:10   01:16     na2 eyelid did not open, had to open/close mirror covers
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 19:41 ecamera    452(  428)  87  65  17.3 18.7 18.8 18.0 17.2   ND3  0.92
 20:55 ecamera    503(  193) 290  70  18.3 18.0 18.4 17.8 18.0   clear  1.09
 22:29 ecamera    447(   88) 231  61  16.2 16.8 17.4 16.5 16.3   clear  1.26
 01:26 dcamera    529( 1041)   4  58  15.8 15.8 16.4 15.7 15.9   -  1.96
           ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    70    31     18   269    (W)    725    clear     none
     17:00    68    28     10   289  (WNW)    773    clear     none
     18:00    68    30     10   258  (WSW)    725    clear     none
     19:00    63    28      8   289  (WNW)    757    clear     none
     20:00    64    28      8   267    (W)    737    clear     none
     21:00    65    27     10   264    (W)    836    clear     none
     22:00    62    27     12   212  (SSW)    822    clear     none
     23:00    61    29      6   253  (WSW)   1150    clear     none
     00:00    62    29     10   292  (WNW)    995    clear     none
     01:00    62    28     14   353    (N)    930    clear     none
     02:00    62    25     10     8    (N)    808    clear     none
     03:00    61    24      5   343  (NNW)    782    clear     none
     04:00    59    25     24    19  (NNE)    784    clear     none
     05:00    60    26     10    52   (NE)    816    clear     none
     06:00    59    26     12     9    (N)    936    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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