Date: Thu, 28 Aug 2008 05:26:39 -0600 (MDT)
Subject: 3.5m Night Log 20080827
From: "Jack Dembicky"
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Wednesday, August 27, 2008
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 D.York       D.York                    DIS           --:--  --:--
 M.Shin       M.Shin, M.Oguri           DIS           --:--  --:--
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 UC04/R     21:29  01:05   4.6   0    0    0    0    0    0    0    0
 PU04/R     01:05  05:40   3.0  1.6   0    0    0    0    0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: J. Dembicky
 Az  Velocity Scale  579.6, Was  577.0, changed 579.0
 Alt Velocity scale -629.6, Was -623.0, changed -628.0
 During checkout tonight I found the DIS slitwheel to be off by 1 slit (1.5 slit was actually 2.0,
 2.0 was actually 0.9, etc.).  I think that the slitwheel had moved during shutdown and had all
the slits off.  I re-homed the wheel and all was fine again.  What I noticed was the slit masks
didn't look right for the 1.5 arc sec slit (I actually noticed something strange Monday night but
didn't get around to re-making all the masks until tonight).  Also the threshold value in the
mkdcammask script seems to have changed.  Tonight I needed to use 0.9 which seemed a bit high.
All slitmasks were re-done tonight and the slit wheel seems to now be placing the correct slit in
place again.  My guess is DIS got bumped during shutdown and the wheel was never re-homed until
tonight when I discovered the problem.
Clouds, humidity and rain tonight.  I called it a night at 05:10.
                       ------- 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
 -----------------------------------------------------------------------
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     18:00    54    53      1   155  (SSE)   1137    cldy      rain
     19:00    53    53      7   183    (S)   1099    cldy      rain
     20:00    53    53      6   168  (SSE)    953    cldy      rain
     21:00    52    52     13   126   (SE)    950    cldy      rain
     22:00    52    51     10   109  (ESE)   1100    cldy      humid
     23:00    53    49     11   143   (SE)   1035    cldy      none
     00:00    52    50      9   163  (SSE)   1010    cldy      none
     01:00    52    49      9   184    (S)    511    cldy      none
     02:00    52    46     13   155  (SSE)    687    cldy      none
     03:00    52    46      7   175    (S)    635    cldy      none
     04:00    51    46      1   145   (SE)    660    cldy      none
     05:00    53    46      1   187    (S)    471    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 1.4.5