Date: Sat, 31 May 2008 11:10:29 -0000 (UTC)
Subject: 3.5m Night Log 20080530
From: "Gabrelle Saurage"
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Friday, May 30th, 2008
                                                         ACTUAL
 ASTRONOMER      OBSERVER(S)             INSTRUMENT    START  FINISH
-------------------------------------------------------------------
 M.Strauss       M.Strauss,M.Shin         DIS          20:10  05:00
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
---------------------------------------------------------------------
 PU04/R     21:08  04:54    0    0    0   1.0  5.0  1.8   0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
Observing Specialists: G.Saurage
Az Velo Scales: 581.2, 580.0; 580.6 (changed to 580)
Thin cirrus off and on, with sub-arc seeing most of the night.
Just after 01:00 we had a spontaneous rotator controller error. After
halting and init-ing the axes, we slewed back to the field and discovered
offsets were not working properly. Doing a control-click on the slitviewer
caused the telescope to offset in the opposite direction. Fritz logged in
and discovered the rotator lost its position when the error occurred. He
reset the position and offsets moved correctly again.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
PU04     D          T/S      01:06  02:04   Rotator controller error
               ---------------- FOCUS LOG ---------------
Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------
 20:44 dis-slit   144(657) 108  76  16.1 18.7 18.2 17.3 16.8     1.16
 22:05 dis-slit   117(551) -64  70  17.1 17.1 17.5 16.8 17.1     1.04
 02:58 dis-slit    44(421) -87  78  16.2 15.9 16.3 15.7 16.1     0.80
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    75    14     14   222   (SW)    978 mstly clr    none
     17:00    73     8     18   248  (WSW)    611 mstly clr    none
     18:00    70     9     26   259    (W)    932    clear     none
     19:00    68     9     14   266    (W)   1000    clear     none
     20:00    64    11     14   244  (WSW)   1087 mstly clr    none
     21:00    62     9     15   257  (WSW)   1082 mstly clr    none
     22:00    63     8     14   267    (W)   1158 mstly clr    none
     23:00    62    10     12   264    (W)   1129  ptly cldy   none
     00:00    62     7      9   246  (WSW)   1073  ptly cldy   none
     01:00    62     7     14   273    (W)   1156 mstly clr    none
     02:00    61     8     12   263    (W)   1193    clear     none
     03:00    61     8     12   274    (W)   1113    clear     none
     04:00    60     7     10   286  (WNW)   1277    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.
                              TELESCOPE STATUS
      Telescope drives operational. Current TCC version: 2.9.1
      Current TUI version: TUI 1.4.5