Date: Fri, 1 Aug 2008 05:42:33 -0600
From: "Jeff Coughlin"
Subject: 3.5m Night Log 20080731
                     Apache Point Observatory
                     3.5m Telescope Night Log
                     Thursday, July 31, 2008
                                                        ACTUAL
 ASTRONOMER     OBSERVER(S)            INSTRUMENT   START  FINISH
 -------------------------------------------------------------------
 K.France   B.Fleming, S.McCandliss, K.Frace  DIS   21:01  01:05
 J.Stockton  J. Stockton, G.Taylor            DIS   01:05  05:18
  INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 CU08/R     21:01  01:05    0    0   0.8   0   3.3   0   0    0    0
 NM05/R     01:05  05:18    0    0   0.3    0  3.9   0   0    0    0
 note: scheduled times listed include instrument change time
               ------------- ACTIVITY LOG --------------
 Observing Specialist: J. Coughlin
 Az Velocity Scale was 576.0, measured 574.1, 577.6; 575.8. Kept at 576.0.
 Mostly clear night with only a slight haze and minor variable seeing.
 At 05:35 UT, while guiding the dis slitviewer froze, (last image #461),
 and the problem was noticed at 05:55 UT, up until which data was still
 being taken. I attempted to re-start the hub connections and re-init the
 camera, but to no success. It allowed me to start an exposure, and cancel
 it in progress, but the image never finished. Eventually a re-start
of 'offset',
 the dcam control computer, fixed the communication problem, but caused
 another problem with the temp set point. Eventually the set point was
 re-established, but the camera warmed up to ~ -1C. (See PR dis/830).
 Observing resumed at 06:46 UT.
 Exact same dis slitviewer problem occurred again at 10:02 UT, was noticed at
 10:09 UT. Solution was another full re-boot of 'offset' the dcam control
 computer followed by a restart of the dcamera and dcam nubs and a dcam init.
 Observing resumed at 10:26 UT. Camera had warmed up again, but cooled back
 down normally as soon as nubs connection was restored. Intriguing error
 message while trying to reconnect before the hard reboot was:
 10:11:57 .dcamera.0 0 dcamera f text="discam locked out by process 1822"
                      ------- FAILURE LOG -------
 PROG   INST   FAILURE MODE     TIME
      (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 CU08  Dcam         I/S      23:35  00:46   Dcam froze
 NM05  Dcam         I/S      04:09  04:26   Dcam froze
              ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------
 20:34 dis-slit   -30(  546) 253  56  17.1 19.7 18.9 18.4 17.6     1.15
 22:43 dis-slit  -149(  294) 259  59  16.3 17.1 16.9 15.7 15.9     1.20
 01:06 dis-slit  -113(  269) 265  63  16.4 15.9 16.2 15.2 15.8     1.20
 02:27 dis-slit   -66(  304) 184  82  16.5 15.8 16.2 15.2 16.0     1.00
 02:54 dis-slit   -86(  283) 199  85  16.6 15.7 16.2 14.9 15.9     1.20
               ------------- WEATHER LOG ----------------
                                  Wind                      Precip.or
    Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
   -------------------------------------------------------------------
     16:00    70    54      6   191    (S)   1052  ptly cldy   none
     17:00    68    54      6   221   (SW)   1050  ptly cldy   none
     18:00    68    52      0   216   (SW)   1035  ptly cldy   none
     19:00    66    43      5   107  (ESE)    941  ptly cldy   none
     20:00    64    43      7    87    (E)   1021 mstly clr    none
     21:00    63    46      6    93    (E)   1197    clear     none
     22:00    62    47      7   111  (ESE)   1266    clear     none
     23:00    61    46      8   128   (SE)   1243    clear     none
     00:00    62    45      5   159  (SSE)   1337    clear     none
     01:00    62    43      2   118  (ESE)   1369    clear     none
     02:00    62    42      2    94    (E)   1360    clear     none
     03:00    62    43      5    95    (E)   1373    clear     none
     04:00    61    43      5    91    (E)   1402    clear     none
     05:00    60    44      3   100    (E)   1486    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 1.5