From: Russet McMillan
Subject: 3.5m Night Log 20060826
Date: Sun, 27 Aug 2006 06:32:17 -0600 (MDT)
                        Apache Point Observatory
                        3.5m Telescope Night Log
                        Saturday, August 26, 2006
                                                          ACTUAL
 ASTRONOMER     OBSERVER(S)              INSTRUMENT   START FINISH
-------------------------------------------------------------------
 G.Wallerstein  G.Wallerstein            Echelle     19:47  20:45
 R.Covarrubias  R.Covarrubias            DIS         20:45  00:58
 Q.Hart         Q.Hart                   SPIcam      01:10  03:25
                                                     04:00  04:25
  INST     SCHED(TWILIGHT)   WEATH     EQUIP     OBS     DAY  NOT USED
 I/ROW/DN    START FINISH   D    B    D    B    D    B   USE   D    B
 ---------------------------------------------------------------------
 DD##/R/D    19:44  20:45   0    0    0    0    0   0.2  0.8   0    0
 UW06/R      20:45  01:10   0    0    0    0   4.1  0.4   0    0    0
 CU02/R      01:10  05:39  1.8   0    0    0   2.7   0    0    0    0
  note: scheduled times listed include instrument change time
                ------------- ACTIVITY LOG --------------
 1st Half Observing Specialist: G.Saurage
 Clear skies! Amazing. George was able to get his observations at the
 beginning of night. The rest of the first half was fairly clear and
 pleasant -- few thin clouds now and again, moderate humidity, but
 certainly useable.
 2nd Half Observing Specialist: R.McMillan
 Second half had some clouds and also some radar echoes at the north
 end of the county.  I was twitchy not only because of previous
 weather patterns but also because at this time of year, the weather
 satellites stop working for a few hours during second half.  So I
 closed for one patch of clouds that turned out to be nothing, then
 the next patch of clouds brought a humidity spike and we closed for
 good.
 Seeing was good for the first few hours of second half, and the
 image distortions mentioned by Bill Ketzeback during the last week
 were again visible.  They looked like bad collimation to me,
 implicating a probable pop of the secondary vanes, but there was no
 time to pursue the problem and it would be pointless with the
 telescope about to be taken apart anyway.  As long as we stayed in
 focus (which takes extra attention in good seeing conditions), the
 image quality was acceptable.  Later, the seeing worsened and our
 image quality was dominated by weather rather than optics.
                       ------- FAILURE LOG -------
  PROG   INST   FAILURE MODE     TIME
       (SEDFNVOG)   TI/SHU    START  FINISH  DESCRIPTION
 ----------------------------------------------------------------------
                ---------------- FOCUS LOG ---------------
                                        Air/Truss   Wind
  Time   Instrument   Focus     Az  El    Temp-C    Dir MPH  filt  FWHM
 ---------------------------------------------------------------------
 20:15 Echelle     100(529)    90  66  14.3/17.2  284  2    nd1   1.2
 21:16 DISslit     -75(1166)   126 45  14.2/16.0  331  3    -     1.1
 01:20 SPIcam      50(1282)    165 57  13.4/13.3  261  2    R     0.65
 02:32 SPIcam      70(1275)    207 64  13.5/13.1  254  1    R     0.97
                ------------- WEATHER LOG ----------------
                                   Wind                      Precip.or
     Time   Temp F Dewp F  MPH  Direction    Dust    Sky    Conditions
    -------------------------------------------------------------------
     16:00    63    52      3   250  (WSW)    313 mstly clr    none
     17:00    66    52     13   244  (WSW)    205 mstly clr    none
     18:00    64    54      9   225   (SW)    289 mstly clr    none
     19:00    61    53      6   237  (WSW)    300 mstly clr    none
     20:00    58    48      2   282  (WNW)    202 mstly clr    none
     21:00    58    46      1   327  (NNW)    221    clear     none
     22:00    55    49      2   348  (NNW)    311 mstly clr    none
     23:00    57    49      2   349    (N)    318 mstly clr    none
     00:00    57    50      5   302  (WNW)    307    clear     none
     01:00    55    50      3   314   (NW)    319  ptly cldy   none
     02:00    56    49      1   220   (SW)    266  ptly cldy   none
     03:00    56    49      3   265    (W)    306  ptly cldy   none
     04:00    56    48      2   204  (SSW)    261 mstly cldy  humid
     05:00    54    52      2   244  (WSW)    429 mstly cldy  humid
     06:00    54    53      4   270    (W)    498  ptly cldy  humid
     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: 2.8.4
      Current TUI version: TUI 1.2