Date: Thu, 22 May 2008 04:48:42 -0600 (MDT)
From: Jack Dembicky
Subject: 3.5m Night Log 20080521
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Wednesday, May 21, 2008
                                                         ACTUAL
 ASTRONOMER      OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 J.Wilson    J.Wilson, M.Skrutskie,      TSpec         --:--  --:--
             M.Nelson, O.Fox, K.Wollard,
             M.Tea, J.Leisenring
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 EN02/R     21:01  04:59   0.8  7.1   0    0    0    0    0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialists: J. Dembicky
 AZ  velocity scale measured 579.9,  File 584.0, Changed to 580.0  (21:48)
 ALT velocity scale measured -633.8, File -638.0,Changed to -634.0 (21:50)
 Wind and dust kept us closed
 The TCC computer died this afternoon, I swapped it out for a spare.
Unfortunately we didn't have a backup of the TINST directory (or I
should say the backup files were out of date).  We lost the TSpec
instrument block but I think I was able to recover a lot of information
from the last time we ran the instrument block.
The UVa folks did some rotation/slit move tests, while we were closed.
I had to redo the instrument block, using the parameter I had from the
previous instrument block (which I found weren't all that good to use).
Of course as soon as I got the instrument block done it completely clouded
over on me!
I think the focus on the new instrument block is OK, but it should be
checked (we had too many clouds and the telescope out of temperature
equilibrium for me to determine).  The instrument block was a quick and
dirty one but seemed to move the objects in the correct direction and
amount so it is most likely usable if we can't recover the old one.
We also had a gmech error all night (but since we weren't on the sky and
didn't need the NA2 guider I didn't try to fix it, but it should be looked
into during the day).  I did try a startNubs gmech but that didn't fix it.
No usable science tonight, dust and wind, then clouds when we finally
could open (after I got the instrument block).
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
      (SAEDFNVOG)   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    65    17     28   249  (WSW)  24224    clear     dust
     19:00    63    14     29   241  (WSW)  33747    clear     dust
     20:00    59    14     32   239  (WSW)  35922    clear     dust
     21:00    57    15     20   245  (WSW)  23975    clear     dust
     22:00    55    18     29   236   (SW)  27621    clear     dust
     23:00    53    21     18   260    (W)  11020    clear     dust
     00:00    52    23     22   257  (WSW)   9490    clear     dust
     01:00    49    22     25   239  (WSW)   7686    clear     dust
     02:00    47    25     28   240  (WSW)   6493    clear     dust
     03:00    45    29     19   264    (W)   4217  pt. cldy    dust
     04:00    44    29     14   261    (W)   4440    cldy      dust
     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