Date: Thu, 18 Mar 2004 05:32:14 -0700 (MST)
From: John Barentine
Subject: 3.5m Night Log 20040317
                         Apache Point Observatory
                         3.5m Telescope Night Log
                        Wednesday, March 17, 2004
                                                          ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 P.Szkody        O.Fraser               DIS            18:40  05:10
  INST        SCHEDULED      WEATH     EQUIP     OBS     DAY  NOT USED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 UW02/R      19:06  05:16   0    0   0.1   0   10.0 0.1   0    0    0
  note: scheduled times listed include instrument change time
                   ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Barentine
 Tonight looked to be good from the start, and nature delivered.  There
was only one trouble spot: Just after 22:30, both Oliver and I noted
consecutive DIS slitviewer images in which each of the stars was doubled.
A look at the TUI focal plane diagram (thanks, Russell!!!) revealed the
offending direction to be altitude.  A magnasensor check then turned up
two bad fiducial crossings.  Slew up, slew down, slew back to the
observer's object... problem solved.
 Around 03:00 the winds shifted toward the northeast and our seeing
degraded from subarcsecond to around 1.4 arcsec.  The rest of the night
was clear and largely calm.
                         ------- FAILURE LOG -------
 PROG   INST   FAILURE MODE     TIME
      (SEGDFVO)    TI/SHU   START  FINISH  DESCRIPTION
 -----------------------------------------------------------------------
 UW02     D         T/H     22:32   22:40  Bad alt magnasensor crossing
                ---------------- FOCUS LOG ---------------
                                        Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 18:44 dis-slit    0(1243)     185 78  9.1/11.1   267  11   -     0.78
 18:45 NA2gdr      0(47000)    187 78  9.1/11.0   268  9    R     0.81
 03:35 DISslit     25(1295)    136 33  8.2/8.3    357  5    -     1.39
 03:38 NA2gdr      -359(46640) 137 34  8.3/8.3    1    9    R     1.32
                 ------------- WEATHER LOG ----------------
                                 Wind                       Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    56    15     16   254  (WSW)           Clear     none
     17:01    56    15     14   261  (W)             Clear     none
     18:01    50    11     14   282  (WNW)           Clear     none
     19:01    48     8     10   263  (W)             Clear     none
     20:01    49    15     13   256  (WSW)           Clear     none
     21:01    47    14     18   248  (WSW)           Clear     none
     22:01    47    14     14   256  (WSW)           Clear     none
     23:01    48    12      8   266  (W)             Clear     none
     00:01    49    12     11   272  (W)             Clear     none
     01:01    48    11      9   313  (NW)            Clear     none
     02:01    48     8     14   345  (NNW)           Clear     none
     03:01    48     9      8   351  (N)             Clear     none
     04:01    47     8     10    32  (NNE)           Clear     none
     05:01    46    10     16    29  (NNE)           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.
    Note: The weather tower dust counter is out of commision
                                TELESCOPE STATUS
    Telescope drives operational. Current Remark version: 2.85b
    Current guide software version: guider v4.1b4
    Current TCC version: 2.7.2  Current TUI version: TUI-0.842