From: Russet McMillan
Subject: 3.5m Night Log 20071129
Date: Fri, 30 Nov 2007 03:38:37 -0700 (MST)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                       Thursday, November 29, 2007
                                                         ACTUAL
 ASTRONOMER     OBSERVER(S)            INSTRUMENT      START  FINISH
 -------------------------------------------------------------------
 M.Klaene       R.McMillan             --              --:--  --:--
   INST     SCHED(TWILIGHT) WEATH     EQUIP      OBS     DAY  NOT USED
 I/ROW/DN   START  FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 EN01/W     17:54  05:49   4.5  7.4   0    0    0    0    0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 Observing Specialist: R.McMillan
 Foggy, raining on and off, no chance of opening.
 Fritz worked on the new axis controller until nearly 21:00, and left
 it controlling the rotator for me to do some tests during the
 night.  Unfortunately, the TCC couldn't talk to the rotator so I
 didn't get any testing done.
 I looked over last night's pointing model and found a minor
 procedural problem that likely explains the increased scatter.  The
 model parameters are very reasonable (in fact, hardly changed at all
 from last month), so I implemented it with only two outliers
 removed.
 I also reduced last night's Shack-Hartmann data and found (gasp!)
 that a collimation adjustment is in order.  It isn't a huge change,
 but is larger than what we've been seeing since the new top end was
 installed last year, and large enough to have a slight impact on
 image quality.  Since adjusting collimation by translating the
 secondary mirror has only a small effect on pointing (unlike the
 effect of tilting the secondary), I applied the new numbers even
 though I couldn't get a followup pointing model.  It should just be
 an offset of a few arcseconds on the sky, easy to compensate for.
 I also did some work on documentation for observing specialists and
 testing of tertiary rotation; I couldn't produce a failure.  TUI
 1.4.3 worked fine for me except for a small bug in the enclosure
 controller, which I reported.
                       ------- 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
    -------------------------------------------------------------------
     16:00    39    35     17   268    (W)    317   cloudy    humid
     17:00    39    40     18   282  (WNW)   4115   cloudy    humid
     18:00    40    41     23   273    (W)   1935   cloudy     fog
     19:00    40    41     18   268    (W)   1340   cloudy     fog
     20:00    40    40     10   270    (W)   5124   cloudy   lt rain
     21:00    39    40     21   247  (WSW)  10245   cloudy     fog
     22:00    40    40     17   268    (W)   1733   cloudy   lt rain
     23:00    41    42     18   269    (W)   8674   cloudy   lt rain
     00:00    40    41     20   244  (WSW)  17451   cloudy   lt rain
     01:00    40    41     12   258  (WSW)   3862   cloudy     rain
     02:00    41    41     17   264    (W)  20221   cloudy     rain
     03:00    41    42     18   248  (WSW)  14710   cloudy     rain
     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 1.4.2