Date: Tue, 21 Oct 2008 07:09:09 -0600 (MDT)
Subject: 3.5m Night Log 20081020
From: "Jack Dembicky"
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Monday, October 20, 2008
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)             INSTRUMENT    START  FINISH
 -------------------------------------------------------------------
 G.Gyuk         M.Hammergren, G.Gyuk    TSPEC         22:35 00:45
 A.Kowalski     A.Kowalski              DIS           01:00 02:20
                                                      06:19 06:50
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 UC06/R     19:18  01:00   3.0   0   0.3   0   1.2  1.2   0    0    0
 UW11/R     01:05  06:19    0   3.1   0    0    0   2.2   0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: J.Dembicky
Az vel scale 580.0 was 582.0 changed n/c
Alt vel scale -630.3 was -633.0 changed -631.0
Approx 04:15(UT) rotator servo errors.  I initially forgot to do an axis init and had my observer
slew (which it did) then saw the stop switches engaged in TUI (they weren't actually) and realized
I forgot the axis init.  Stopped the drives and re-init them and then got the servo errors.  I
could seem to rotate the instrument CW but not CCW.  It managed to clear itself after about 15
mins (I had just called Fritz.
While focusing the stars wanted to drift durng the sweep.  telescope was in the west both times.
This happened for both TSPEC and DISslit.
01:11 DIS slit camera started giving strange images.  see images 029-032
08:21 Rotator stopped (08:20:58UT to be exact).  Read timed out on LTA5.  COntroller error and
then servo error after restart.  Again it cleared itself about 15 mins later, well I could rotate
it CW again to 0 but it refused again to go CCW.
It also started sprinkling on us while all this was happening (cloud with virga coming off it as
we had patchy skies).
I let the observer take cals while we were closed and then continued to see if I could get the
rotator working again.  When I start working on it again (it was stuck at 0) I could rotate it to
-45 but not CW now.
I tried it with TUI and the rotations seemed to work from there now (it originally failed under TUI).
11:19:03 ctrl click not working for DIS slitviewer for me.  The arrow pointed to the boresight but
the star moved horizontal (should have moved diagonal).  repeated attempts just moved it further
horizontal.  see guider images 192-195.  Upon going up to the dome discovered that the rotator was
off by about 30 deg and most likely caused by the earlier controller/servo problems.  I roughly
set it back to 0 but the rotator needs to be re-zero'ed with the level (I just used the tape due
to my observer needing to get a std and twilight approaching.
TSPEC Aux tank was not filled at the start of the night.
NA2 rotator needs to be zero'ed
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
      (STEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
 UC06      T         T/H      22:15  22:35   Rotator servo error
               ---------------- FOCUS LOG ---------------
 Time  Instrument  Focus    Az  El  Temp Strc Prim  Sec  Air  filt FWHM
 -----------------------------------------------------------------------
 22:37 TSPEC    -36(398)  -121  49  10.6 10.6 10.6  9.9  10.2  Ks   0.71
 01:01 DISSlit  -118(-20)  -78  55  10.2  9.9 10.3   9.4 10.1  --   1.2
                 ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    52    41     11   147  (SSE)    580    cldy     lt. rain
     17:00    48    43     18   131   (SE)    538    cldy      none
     18:00    49    41     15   148  (SSE)    137    cldy      none
     19:00    52    40     12   184    (S)    583    cldy      none
     20:00    52    37     17   199  (SSW)    757    cldy      none
     21:00    52    39     12   181    (S)    747    cldy      none
     22:00    52    39     13   184    (S)    805  pt. cldy    none
     23:00    50    38      8   188    (S)    730    clear     none
     00:00    50    39      7   199  (SSW)    753    clear     none
     01:00    50    39      8   227   (SW)    787   pt. cldy   none
     02:00    50    39     15   219   (SW)    839    cldy      none
     03:00    49    38      7   219   (SW)    804    cldy      none
     04:00    48    38      5   260    (W)    818    cldy      none
     05:00    48    39      5   256  (WSW)    786   pt. cldy   none
     06:00    49    36      4   316   (NW)    851   pt. 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