Date: Sun, 20 Apr 2008 06:27:31 -0600
From: "Jeff Coughlin"
Subject: 3.5m Night Log 20080419
                       Apache Point Observatory
                       3.5m Telescope Night Log
                       Saturday, April 19, 2008
                                                        ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 ------------------------------------------------------------------
 K.France       K.France,E.Burgh,       NICFPS        19:45   23:45
               B.Fleming
 T.Murphy      R.McMillan               APOLLO        00:00   00:40
 J.Fulbright   G.Ruchti                 ECHELLE       01:00   06:00
  INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 CU04/O     20:33  00:05    0   1.8   0    0    0   2.7  0    0    0
 UW15/O     00:05  01:05    0   1.0   0    0    0    0   0    0    0
 JH06/R     01:05  05:32    0    0    0   0.6   0   3.8  0    0    0
 note: scheduled times listed include instrument change time
               ------------- ACTIVITY LOG --------------
 Observing Specialist: J. Coughlin
 [Narrative added by Russet McMillan, backup obs-spec]
 Medium-to-heavy clouds posed a problem throughout first half, but the
 observers tried to work through the clouds for a few hours anyway.
 The tertiary failed the move to APOLLO and needed to be homed; the
 reported position was nearly 180 degrees from the actual position.
 No time was lost since the clouds were too thick to work through.
 After switching to echelle, the pointing was significantly off (more
 than the FOV) and needed to be corrected.
 A power outage at 04:15 triggered a telescope/dome collision
 interlock.  The generator provided power for an hour with a few minor
 flickers; transition back to utility power was smooth.
                      ------- FAILURE LOG -------
 PROG   INST   FAILURE MODE     TIME
      (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 JH06   E           T/H     04:16   04:52   power outage, tel/dome collision
              ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 ----------------------------------------------------------------------
 23:59 ECHELLE   -74( -704)  26  56   9.2  9.4  9.8  8.9  9.1     0.95
               ------------- WEATHER LOG ----------------
                                  Wind                      Precip.or
    Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
   -------------------------------------------------------------------
     16:00    63    17     20   231   (SW)   2996  ptly cldy   none
     17:00    59    13     16   238  (WSW)   2381 mstly cldy   none
     18:00    55     9     20   206  (SSW)   2841 mstly cldy   none
     19:00    53     7     16   241  (WSW)   2978 mstly cldy   none
     20:00    53     6     15   205  (SSW)   2425 mstly cldy   none
     21:00    52     6     17   216   (SW)   2348 mstly cldy   none
     22:00    52     6     21   221   (SW)   2661   cloudy     none
     23:00    51     5     16   238  (WSW)   2642   cloudy     none
     00:00    50     2     23   246  (WSW)   2464   cloudy     none
     01:00    49     4     23   234   (SW)   2196 mstly cldy   none
     02:00    48    13     22   208  (SSW)   2102  ptly cldy   none
     03:00    46    18     30   229   (SW)   1936  ptly cldy   none
     04:00    44    16     18   230   (SW)   2095  ptly cldy   none
     05:00    42    17     24   241  (WSW)   1550  ptly cldy   none
     06:00    41    14     16   242  (WSW)   1252 mstly clr    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: 2.9.1
     Current TUI version: TUI 1.5a8 2008-04-18