Subject: 3.5m Night Log 20080131
Date: Fri,  1 Feb 2008 07:58:10 -0700 (MST)
From: bketzeba@apo.nmsu.edu (Bill Ketzeback)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                       Thursday, January 31, 2008
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 M.Shin        M.Shin,M.Oguri,          DIS           17:30  00:05
               A.Soderberg
 G.Kacprzak    G.Kacprzak               DIS           00:10  07:00
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 --------------------------------------------------------------------
 PU05/R     18:30  00:10    0    0   0.6   0   5.1   0    0    0    0
 NM05/R     00:10  06:03    0    0    0    0   2.5  3.4   0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: B.Ketzeback
 Photometric skies for most of the night with moderate seeing.
 Shortly after we focused and the user slewed to their first star
 we were getting repeated over current conditions on the rotator
 near 40 degrees rotation. I found that even with an e-stop engaged
 I could not rotate the instrument by hand past this point.
 I quickly discovered that the rotator was out of cable wrap.
 The best I can guess is that yesterday when Fritz and I switched
 from the new axis controller back to the old controller we had
 zero'd the rotator but on the wrong cable wrap. Because we did not
 open last night and my test slews did not exercise the rotator
 far enough in the positive direction during checkout it did not
 present as a problem until we got on sky. I dismounted DIS,
 properly zero'd (leveled) the rotator and remounted the instrument.
 The whole process took around 40 minutes.
 There were no other problems tonight other than an occasional need
 to restart the dis-slitviewer hub which causes insignificant
 downtime and will not be recorded.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 PU05     D          T/H      18:24  19:00   Rotator zero'd on wrong wrap
               ---------------- FOCUS LOG ---------------
Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------
 18:09 dis-slit 281(-190)   13  77  -2.7 -3.4 -2.4 -3.3 -2.7   -   1.31
 19:40 dis-slit 74(-329)   118  35  -1.2 -3.2 -2.1 -3.3 -2.3   -   1.77
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    21   -17      8     1    (N)    247    clear     none
     17:00    28   -20     26    31  (NNE)    596    clear     none
     18:00    29   -21     17    39   (NE)    838    clear     none
     19:00    26   -24     18    29  (NNE)    578    clear     none
     20:00    30   -19      9    36   (NE)   1052    clear     none
     21:00    30   -17     12   354    (N)   1069    clear     none
     22:00    31   -16      7   338  (NNW)   1142    clear     none
     23:00    33   -13      6   339  (NNW)   1050    clear     none
     00:00    34   -13     16   278    (W)    776 mstly clr    none
     01:00    34   -12     16   270    (W)    794 mstly clr    none
     02:00    34   -12     16   255  (WSW)    759 mstly clr    none
     03:00    34   -11     11   268    (W)    821  ptly cldy   none
     04:00    34   -11     15   246  (WSW)    796  ptly cldy   none
     05:00    34   -11     17   290  (WNW)    787  ptly cldy   none
     06:00    33   -11     12   248  (WSW)    756  ptly 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 1.4.4