From:
Subject: 3.5m Night Log 20090125
Date: Mon, 26 Jan 2009 14:05:30 +0000 (UTC)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Sunday, January 25, 2009
                                                         ACTUAL
 ASTRONOMER      OBSERVER(S)              INSTRUMENT   START  FINISH
 -------------------------------------------------------------------
 A.Kowalski      A.Kowalski               DIS          17:50  01:00
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ----------------------------------------------------------------------
 UW04/R     18:26  06:05   5.1   0    0    0   6.5   0    0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
Observing Specialists: R.McMillan
We had high clouds at sunset, then a few hours of mostly clear skies,
then more clouds second half.  Mediocre and variable seeing improved
partway through first half, but then got worse along with increasing
winds after midnight.  Wind was coming from the direction where the
telescope was pointing, and I could see the telescope struggling on
the dataq.  When the wind settled above the limit I closed, and
stayed closed for the remainder of the night with winds sometimes
above 40 mph.
Pointing was off by 2 arcminutes or more, but I was reluctant to
change the tertiary tilts given our recent troubles with the
actuators, scheduled for work on Monday.  Instead, I made a calib
offset pointing correction, and since we were tracking the same
object all night the guider was able to compensate for the change in
behavior of calib offsets at different altitudes.
The instrument and telescope (aside from the pointing) behaved well.
                       ------- 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
 -----------------------------------------------------------------
 18:17 dis-slit  -100( -218) 138  56   4.6  5.5  5.0  4.4  4.3  -   1.50
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    45    21     18   258  (WSW)    535  ptly cldy   none
     17:00    41    19     16   189    (S)    482  ptly cldy   none
     18:00    39    18     12   205  (SSW)    566  ptly cldy   none
     19:00    40    16     17   227   (SW)    511 mstly clr    none
     20:00    40    16     20   199  (SSW)    531    clear     none
     21:00    40    17     20   203  (SSW)    571    clear     none
     22:00    41    16     23   218   (SW)    594    clear     none
     23:00    41    15     29   197  (SSW)    603 mstly clr    none
     00:00    41    13     20   202  (SSW)    586  ptly cldy   none
     01:00    40    11     32   216   (SW)    569  ptly cldy   none
     02:00    40     8     27   218   (SW)    432  ptly cldy   none
     03:00    40     6     30   234   (SW)    487  ptly cldy   none
     04:00    39     8     30   231   (SW)    579  ptly cldy   none
     05:00    39    11     26   231   (SW)    545 mstly cldy   none
     06:00    38    17     31   249  (WSW)    574 mstly cldy   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 1.5.1