Date: Mon, 22 Nov 2004 05:48:11 -0700 (MST)
From: John Barentine
Subject: 3.5m Night Log 20041121
                          Apache Point Observatory
                          3.5m Telescope Night Log
                         Sunday, November 21, 2004
                                                            ACTUAL
   ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
   --------------------------------------------------------------------
   F.Hearty   F.Hearty,S.Beland,           NIC-FPS       21:45  04:15
              J.Barentine,C.Froning
              N.Cunningham,M.Drosback
              J.Walawender
    INST        SCHEDULED      WEATH     EQUIP     OBS     DAY  NOT USED
   I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
   ---------------------------------------------------------------------
   EN02/O      17:56  05:44  3.1  2.2   0    0    0   6.5   0    0    0
    note: scheduled times listed include instrument change time
                     ------------- ACTIVITY LOG --------------
  Observing Specialist: J.Barentine
  Another night of mixed results, weather-wise.  Conditions were poor
toward sunset, with overcast skies and fog.  Not long after the dewpoint
dropped sharply.  At 21:30 we began ventilating in hopes of opening
shortly to get sky rings with the NIC-FPS etalon.  By 21:45 we were
confident enough as to the weather situation in order to open.
  Just after midnight we had a problem with the filter wheels, which
failed on a requested move.  Recovery from this required care in order to
assure that the software did not lose track of the absolute position of
the wheels.
  Not long after we fixed the filter wheel problem, clouds increased to
the point where we couldn't do any useful work, so we waited out the
weather.   We closed at 04:15 due to high humidity, and stayed closed for
the rest of the night.
                        ------- FAILURE LOG -------
    PROG   INST   FAILURE MODE     TIME
        (SEGDFNVO)    TI/SHU   START  FINISH  DESCRIPTION
  -----------------------------------------------------------------------
   EN02     N          I/H     00:06   01:00  Filter wheel move failure
                   ---------------- FOCUS LOG ---------------
                                          Air/Truss   Wind
   Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
   ---------------------------------------------------------------------
   23:27  nicfps     200(1461)   136 42  1.4/1.0    188  16   J     0.72
                  ------------- WEATHER LOG ----------------
                                     Wind                       Precip.or
       Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
      ------------------------------------------------------------------
       16:01    34    29     12   178  (S)      865  MstlyCldy   none
       17:01    33    30     13   179  (S)     1896  Overcast    none
       18:01    32    31     11   182  (S)     1708  Overcast    none
       19:01    34    18     13   184  (S)      239  Overcast    none
       20:01    34    22     11   221  (SW)     334  MstlyCldy   none
       21:01    35    24     15   218  (SW)     340  PtlyCldy    none
       22:01    35    27     12   203  (SSW)    485  PtlyCldy    none
       23:01    34    27     12   191  (S)      466  PtlyCldy    none
       00:01    35    25     16   203  (SSW)    436  PtlyCldy    none
       01:01    35    27     12   222  (SW)     499  PtlyCldy    none
       02:01    35    27      6   254  (WSW)    433  PtlyCldy    none
       03:01    35    27      6   216  (SW)     371  PtlyCldy    none
       04:01    32    27      0   184  (S)      467  PtlyCldy    none
       05:01    32    28      5   161  (SSE)    625  PtlyCldy    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 Remark version: 2.85b
        Current TCC version: 2.7.2  Current TUI version: TUI 0.92