From:
Subject: 3.5m Night Log 20091017
Date: Sun, 18 Oct 2009 12:55:07 +0000 (UTC)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                       Saturday, October 17, 2009
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 B.Williams     B.Williams              DIS           19:00  00:54
 J.Coughlin     J.Coughlin              SPIcam        01:05  05:45
  PROG        SCHEDULED      WEATH     EQUIP      OBS     NOT USED
 I/ROW/DN   START  FINISH    D    B    D    B    D    B    D    B
 ------------------------------------------------------------------
 UW03/R     18:36  01:00     0    0    0    0   6.4   0    0    0
 NM02/O     01:00  07:01    1.4   0    0    0   4.6   0    0    0
 note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: R.McMillan
 A nice photometric night with good seeing after about the first
 hour.  Humidity rose during second half; I pushed the limit somewhat
 after checking surfaces in the dome, but the dewpoint kept climbing
 until we had to close about half an hour before morning twilight.
 The telescope and instruments behaved beautifully.  Tracking was
 greatly improved over the performance a week ago.  The observing
 plan called for following a target through a very high transit, but
 we had to close while it was still a few minutes shy of crossing the
 meridian -- we did see more blips on the azimuth telemetry as the
 tracking speed increased, but it didn't cause any noticeable
 problems in image quality.  The observer did see some monotonic
 drift in the azimuth direction, but this was at altitudes higher
 than our pointing model goes, so it was probably not due to axis
 misbehavior.
                ------------- FAILURE LOG --------------
  PROG   INST   FAILURE MODE     TIME
      (STEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------------
 19:09 dis-slit    38(  191)  89  64   7.5 11.2 10.0 10.1  9.2   -  1.40
 01:13 SPICAM    54(  296) 107  33   7.0  7.1  7.4  6.4  6.9   z  0.85
                 ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    58    36      7   264    (W)    621    clear     none
     17:00    55    35      4   274    (W)    618    clear     none
     18:00    53    36      3   266    (W)    483    clear     none
     19:00    46    35     10    81    (E)    663    clear     none
     20:00    47    35      5    85    (E)    557    clear     none
     21:00    49    35      1   133   (SE)    602    clear     none
     22:00    48    35      2   205  (SSW)    629    clear     none
     23:00    46    35      7   191    (S)    507    clear     none
     00:00    46    37      5   183    (S)    531    clear     none
     01:00    45    38     12   184    (S)    634    clear     none
     02:00    44    38      8   181    (S)    621    clear     none
     03:00    44    39      8   180    (S)    684    clear     none
     04:00    45    39      7   194  (SSW)    753    clear     none
     05:00    46    40      7   221   (SW)    798    clear    humid
     06:00    45    41      5   262    (W)    936    clear    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: 2.11.1
      Current TUI version: TUI 1.6.2