Subject: 3.5m Night Log 20070918
Date: Wed, 19 Sep 2007 07:54:34 -0600 (MDT)
From: bketzeba@apo.nmsu.edu (Bill Ketzeback)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                       Tuesday, September 18, 2007
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)              INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 M.Moe          M.Moe                    DIS           22:30  01:05
 B.Balick       K.Kwitter                DIS           01:05  07:10
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 CU03/R     19:58  01:05    0   2.5   0    0   1.9  0.7   0    0    0
 UW06/R     01:05  05:57    0    0    0    0   4.9   0    0    0    0
  note: scheduled times listed include instrument change time
               ------------- ACTIVITY LOG --------------
 Observing Specialists: B.Ketzeback
 Azimuth Velocity Scale: Was 582.5, Measured 579.6, Changed to 580.0
 The first couple of hours we were closed due to threatening orographic
 clouds and what appeared to be stuff headed in from our radar blind spot.
 Once we felt it was safe we opened.
 At 04:45 and again a few minutes later the rotator halted due to
 over current conditions. We were pointed just north of west where
 the field rotation is rather slow. Rotator at -125 degrees. Trying
 to drive such a heavy instrument at such slow speeds was likely the
 cause. After the rotation axis was init-ed currents seen on the
 dataq were in the 1.0 - 1.06 range before the second over current
 condition at 04:52. Recovery was quick on both events and no equipment
 time loss will be recorded.
 No other problems.
                      ------- FAILURE LOG -------
 PROG   INST   FAILURE MODE     TIME
      (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 UW06    D         T/H       --:--  --:--   Rotator overcurrent
 UW06    D         T/H       --:--  --:--   Rotator overcurrent
             ---------------- FOCUS LOG ---------------
 Time  Instrument   Focus   Az  El  Temp Strc Prim  Sec  Air  filt  FWHM
 ------------------------------------------------------------------------
 22:47 dis-slit -207(134)   29  78  11.8 13.0 13.1 12.6 12.4   -    1.3
               ------------- WEATHER LOG ----------------
                                  Wind                      Precip.or
    Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
   -------------------------------------------------------------------
     16:00    65    42     11   268    (W)   1653 mstly cldy   none
     17:00    63    44     11   218   (SW)   1904  ptly cldy   none
     18:00    57    42      8   260    (W)   1599  ptly cldy   none
     19:00    57    41      6   252  (WSW)   1346  ptly cldy   none
     20:00    55    41      7   225   (SW)   1201  ptly cldy   none
     21:00    55    41      7   221   (SW)   1204  ptly cldy   none
     22:00    55    41      4   195  (SSW)   1195  ptly cldy   none
     23:00    53    41      5   182    (S)   1151 mstly clr    none
     00:00    54    42      5   188    (S)   1127    clear     none
     01:00    54    43      5   185    (S)   1105 mstly cldy   none
     02:00    54    42      8   185    (S)   1011    clear     none
     03:00    54    42     10   234   (SW)    909    clear     none
     04:00    54    42     12   210  (SSW)    822    clear     none
     05:00    53    42      9   218   (SW)    908    clear     none
     06:00    53    41      8   187    (S)    958 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 1.4