From:
Subject: 3.5m Night Log 20100214
Date: Mon, 15 Feb 2010 12:50:34 +0000 (UTC)
                       Apache Point Observatory
                       3.5m Telescope Night Log
                       Sunday, February 14, 2010
                                                        ACTUAL
 ASTRONOMER      OBSERVER(S)            INSTRUMENT     START  FINISH
 --------------------------------------------------------------------
 X.Liu           X.Liu                   DIS           18:15  22:40
 F. Mullally     S. Thompson             DIS           --:--  --:--
   INST       SCHEDULED     WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B    D    B
 --------------------------------------------------------------------
 PU03/R    17:56   00:10   1.5   0    0    0   4.0  0.7   0    0
 PU01/R    00:10   06:38   6.5   0    0    0    0    0    0    0
 note: scheduled times listed include instrument change time
               ------------- ACTIVITY LOG --------------
 Observing Specialist:  R.McMillan
 The night started out photometric with variable seeing.  Humidity
 rose steadily through first half until we had to close.  The
 dewpoint depression kept narrowing until we had some fog coming
 through; conditions didn't improve again before morning.
                    ------- 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
 --------------------------------------------------------------------------
 18:22 dis-slit   219( -150) 132  73  -2.2  0.7 -0.7 -0.5 -0.8       1.40
               ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    ------------------------------------------------------------------
     16:00    35    14     14   279    (W)    377    clear     none
     17:00    31    11     15   304   (NW)    363    clear     none
     18:00    28    10     14   329  (NNW)    402    clear     none
     19:00    27    12      8   331  (NNW)    416    clear     none
     20:00    27    14     11   319   (NW)    527    clear     none
     21:00    25    14      5     2    (N)    518    clear     none
     22:00    24    19      7   332  (NNW)    436    clear     none
     23:00    22    20      9   339  (NNW)    440    clear    humid
     00:00    22    19      3   352    (N)    423    clear    humid
     01:00    21    20      9   316   (NW)    482    clear    humid
     02:00    20    19      7   304   (NW)    418    clear    humid
     03:00    20    19      6   276    (W)   2947    clear     fog
     04:00    19    18      2   247  (WSW)   8003    clear     fog
     05:00    20    18      2   309   (NW)   3893    clear     fog
     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: 2.11.1
    Current TUI version: 1.7.0