From: Russet McMillan
Subject: 3.5m Night Log 20060204
Date: Sun,  5 Feb 2006 05:56:26 -0700 (MST)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                       Saturday, February 4, 2006
                                                         ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START FINISH
 --------------------------------------------------------------------
 G.Gyuk        M.Hammergren,A.Puckett    DIS           18:35  00:09
 P.Yoachim     P.Yoachim                 DIS           00:10  04:00
  INST     SCHED(TWILIGHT)   WEATH     EQUIP     OBS     DAY  NOT USED
 I/ROW/DN    START FINISH   D    B    D    B    D    B   USE   D    B
 ----------------------------------------------------------------------
 UC03/R     18:34  00:10    0    0    0    0    0   5.6   0    0    0
 UW06/R     00:10  06:00   2.0   0    0    0   3.1  0.7   0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: R.McMillan
 Clear skies at sunset turned to thin high clouds before the end of
 twilight.  We were delayed in getting going on the sky because off
 what we thought was a slitviewer hardware problem, but turned out to
 be wetware; all of us had failed to notice that the instrument setup
 was wrong.  We got going right at the end of twilight, so no time
 was officially lost.
 The clouds thickened ever so gradually throughout the night.  The
 observer kept struggling until 05:30, but I estimated that several
 hours of that time were useless due to clouds.
 The only actual equipment problem was a failure of the
 eyelids-closed sensor, which has been acting up recently.  I had to
 close the covers manually for the observers to re-do their cals, but
 after that the sensor worked normally and I was able to resume
 automatic control.
                      ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)    TI/SHU   START  FINISH  DESCRIPTION
 -----------------------------------------------------------------------
                ---------------- FOCUS LOG ---------------
                                        Air/Truss   Wind
 Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 18:43 DISslit     60(742)     240 51  3.4/3.5    260  7    -     1.4
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
     ------------------------------------------------------------------
     16:01    43     5     12   251  (WSW)   1062  mstly clr   none
     17:01    39     3      6   251  (WSW)   1001  mstly clr   none
     18:01    36     2      5   251  (WSW)   1155   cirrus     none
     19:01    38     1      7   267  (W)     1150   cirrus     none
     20:01    39     1      6   269  (W)      883   cirrus     none
     21:01    40     0     13   265  (W)     1269   cirrus     none
     22:01    38     2      7   259  (W)     1538   cirrus     none
     23:01    39     4     12   260  (W)     1456  ptly cldy   none
     00:01    40     0     11   258  (WSW)    817  ptly cldy   none
     01:01    38     1     10   266  (W)      955  ptly cldy   none
     02:01    39     2     13   276  (W)      946  ptly cldy   none
     03:01    39     2     19   281  (W)      885  ptly cldy   none
     04:01    40     4     20   275  (W)      924  mstly cldy  none
     05:01    39     4     13   270  (W)      944  mstly cldy  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: 2.8
      Current TUI version: TUI 1.1