From: Russet McMillan
Subject: 3.5m Night Log 20071225
Date: Wed, 26 Dec 2007 06:07:40 -0700 (MST)
                         Apache Point Observatory
                         3.5m Telescope Night Log
                        Tuesday, December 25, 2007
                                                           ACTUAL
  ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
 --------------------------------------------------------------------
 M.Klaene         R.McMillan             --             --:--  --:--
   INST     SCHED(TWILIGHT)   WEATH     EQUIP     OBS     DAY  NOT USED
  I/ROW/DN    START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 EN01/W       18:01 06:06   1.0 11.1   0    0    0    0    0    0    0
   note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: R.McMillan
 We started out the night with high winds and dust, progressing to
 high humidity, then snow.  Second half had a few hours of clear sky
 and borderline conditions, but there was enough wind that I was
 concerned about snow blowing down from the roof of the dome, so I
 stayed closed.
 Aside from enjoying a nice Christmas dinner, I took darks to
 accompany last night's Agile data, did some tests of velocity scales
 at different azimuths, and re-analyzed last night's pointing model
 data.  The results seem to show that something is slightly off with
 the azimuth drive system, which we've known for a couple of weeks --
 but it's too subtle to have a real impact on science yet.  We'll be
 keeping an eye on it.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 ----------------------------------------------------------------------
                 ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
 ---------------------------------------------------------------------
     16:00    29     8     25   244  (WSW)    696 mstly cldy   none
     17:00    26     6     22   270    (W)   7086 mstly cldy   dust
     18:00    24    10     24   270    (W)   3997   cloudy     dust
     19:00    20    20     12   344  (NNW)   6847   cloudy    humid
     20:00    19    18     15     4    (N)   2951   cloudy   lt snow
     21:00    17    16     19   360    (N)   1878   cloudy   lt snow
     22:00    18    15     21    42   (NE)    293   cloudy   lt snow
     23:00    18    14     21    22  (NNE)    339   cloudy    humid
     00:00    15    12     19    47   (NE)    256 mstly cldy  humid
     01:00    14    11     14    56   (NE)    277 mstly cldy  humid
     02:00    18     8     11    22  (NNE)    268 mstly clr    none
     03:00    16     9      2   188    (S)    244 mstly clr    none
     04:00    16     9      2   246  (WSW)    252 mstly clr    none
     05:00    15    10      7   289  (WNW)    245 mstly clr   humid
     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 1.4.3