From: Russet McMillan
Subject: 3.5m Night Log 20040126
Date: Tue, 27 Jan 2004 07:01:07 -0700 (MST)
                         Apache Point Observatory
                         3.5m Telescope Night Log
                         Monday, January 26, 2004
                                                          ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 S.Snedden       S.Snedden,D.Long       DIS            18:25  00:17
 R.Kron          R.Kron,L.Grodnicki     DIS            00:18  06:20
  INST        SCHEDULED      WEATH     EQUIP     OBS     DAY  NOT USED
 I/RO/DN     START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 NM08/O      18:26  00:15   0    0    0    0   1.5  4.3   0    0    0
 UC01/R      00:15  06:06   0    0    0    0   5.8   0    0    0    0
  note: scheduled times listed include instrument change time
                  ------------- ACTIVITY LOG --------------
 1st Half Observing Specialist: J.Barentine
 The DIS grating tilt motors in bay 1 failed during afternoon checkout due
to the cold ambient temperatures upstairs and, for the moment, prevented
me from calibrating the instrument.  With help from Craig and Jon D., we
warmed the grating motors up sufficiently to calibrate.  Opened at 18:20
after checking outside for obvious signs of blowing snow.  DIS gave us no
further trouble, and there was no other telescope weirdness attributable
to the cold.
 2nd Half Observing Specialist: R.McMillan
 Second half was clear, with blowing snow near ground level which
 showed up significantly on the cloud camera but did not make it up
 to the level of the 3.5m.  We took care not to move the DIS grating
 motors, and everything worked well.  The only anomaly was that the
 DIS blue-side bias level was considerably lower than normal (35
 instead of 75).  That may have been cold-related since it only
 appeared within the last day or so.  Since the bias appeared stable
 during the course of the night, we assumed it wasn't a problem, but
 it will be something to watch for the next few days.
                        ------- FAILURE LOG -------
 PROG   INST   FAILURE MODE     TIME
      (SEGDFVO)    TI/SHU   START  FINISH  DESCRIPTION
 -----------------------------------------------------------------------
                ---------------- FOCUS LOG ---------------
                                        Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 18:37 DISslit     -100(316)   200 75  -10.0/-8.3 321  14   -     2.12
 18:39 NA2gdr      1982(48982) 201 74  -9.8/-8.3  322  15   R     0.93
                   -------------- WEATHER LOG ----------------
                                 Wind                       Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    16    -9      1   264  (W)           MstlyClr    none
     17:01    16   -12     11   328  (NNW)         MstlyClr    none
     18:01    15   -15     15   322  (NW)          MstlyClr    none
     19:01    15   -13     16   299  (WNW)          Clear      none
     20:01    16   -12     15   303  (WNW)          Clear      none
     21:01    16    -2     12   278  (W)            Clear      none
     22:01    17    -3     17   297  (WNW)          Clear      none
     23:01    17     2     17   299  (WNW)          Clear      none
     00:01    18    -1     22   295  (WNW)          Clear      none
     01:01    17     1     17   298  (WNW)          clear      none
     02:01    18    -1     20   298  (WNW)          clear      none
     03:01    18    -2     16   312  (NW)           clear      none
     04:01    18    -2      8   315  (NW)           clear      none
     05:01    17    -4      6   338  (NNW)          clear      none
     06:01    18    -6     18     2  (N)            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 Remark version: 2.85b
   Current guide software version: guider v4.1b4
   Current TCC version: 2.7.2  Current TUI version: TUI-0.81