Subject: 3.5m Night Log 20180410
From: trudyk@apo.nmsu.edu
Date: Wed, 11 Apr 2018 12:28:01 +0000 (UTC)
                      Apache Point Observatory
                      3.5m Telescope Night Log
                      Tuesday, April 10, 2018
                                                           ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
--------------------------------------------------------------------
B.Bolin           B.Bolin               DIS            19:38   01:04
A.Kowalski        A.Kowalski            ARCTIC         01:13   06:30
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 ----------------------------------------------------------------
UW04/R     19:38   01:10    0    0    0    0   5.5  0.0   0    0
CU05/R     01:10   06:30    0    0    0    0   3.0  2.3   0    0
note: scheduled times listed include instrument change time
              ------------- ACTIVITY LOG --------------
Observing Specialist: T.Rudyk
Evening started mostly clear but with clouds coming from the north. Dcam was again showing noise on a lot of images, to the point it was intrusive to guiding and locating objects. We raised the temperature of dcam from -25C to -20C and the noise was reduced significantly.
The CU05 program involved lots of filter changes on arctic.  We avoided the mis-alignment problem by homing the filter wheel every 30 minutes.
Arctic also hung mid-sequence, and needed an init.  We lost a quad in doing so. Fortunately the observer's target was not in the dropped quad, so we continued observing. We were open all night.
                    ------- FAILURE LOG -------
PROG   INST   FAILURE MODE     TIME
    (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
----------------------------------------------------------------------
            ---------------- FOCUS LOG ---------------
Time  Instrument  Focus     Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
--------------------------------------------------------------------------
 19:55 dcamera    420(  784) 120  59  10.0 12.9 12.4 13.2 10.6 --    1.11
 21:11 dcamera    481(  719) -48  61  10.1 10.6 11.0 10.3 10.1 --    1.36
 01:20 arctic   502(  851) -120  55   9.8  9.7 10.4  9.7  9.4   J-C_R  0.70
            ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    54    20     16   270    (W)   2078 mstly clr    none
     17:00    55    15     11   271    (W)   2301 mstly clr    none
     18:00    56    13      9   312   (NW)   2586 mstly clr    none
     19:00    51    15      6   265    (W)   2399 mstly clr    none
     20:00    50    14      4   254  (WSW)   2689 mstly clr    none
     21:00    50    11      9   216   (SW)   2770 mstly clr    none
     22:00    50    18     11   218   (SW)   2717 mstly clr    none
     23:00    50    19      5   197  (SSW)   2887 mstly clr    none
     00:00    53    14      6   263    (W)   3003 mstly clr    none
     01:00    51    12      7   207  (SSW)   2706 mstly clr    none
     02:00    50    17      8   186    (S)   2730 mstly clr    none
     03:00    50    15     11   209  (SSW)   2592 mstly clr    none
     04:00    50    12     13   217   (SW)   2297 mstly clr    none
     05:00    49    17     13   206  (SSW)   2443 mstly clr    none
     06:00    47    19     14   203  (SSW)   2250 mstly clr    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 STATUS
    Telescope drives operational. Current TCC version: 1.2.4
    Current TUI version: 2.6.0