From: Russet McMillan
Subject: 3.5m Night Log 20000730
Date: Mon, 31 Jul 2000 06:11:39 -0600 (MDT)
                          SUNDAY JULY 30 2000
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Gillespie	Deglman		   NA2 gdr	 7/30   22:30  01:10
Gillespie	McMillan	   S-H, DIS	 7/31   01:10  05:17
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
EN02/O	   21:02 01:10	 1.5   -    0    -   2.6   -    -    0    -
EN02/O	   01:10 05:17    0    -    0    -   4.1   -    -    0    -
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
first half Observing Specialist: deglman
Did not open on schedule due rain and clouds.  Opened at 22:05.  Had
problems with slews being sent from either mcnode or Remark.  Did a
telstop/telrun, then restarted_mc.  Good after that.
While working with the SH software, the mouse seemed real sluggish.  The
program later crashed when trying to do analysis.  Restarted both Obs2 and
SHmachine, worked fine after that.
2nd half Observing Specialist: McMillan
Weather during second half remained partly cloudy.  I was unable to
reach Jeff Morgan for a full description of what he desired from the
Shack-Hartmann data, so I simply did a full altitude sweep at roughly
7-degree intervals.  Then, because I still thought the collimation
looked very poor, I made adjustments to the secondary tip/tilts to
improve the appearance of the focus donuts by eye, then took some more
S-H data at three different altitudes.  Unfortunately, these
measurements were somewhat troubled by a sudden worsening of the
seeing.  I returned to the nominal secondary tilts and got a few more
stars for comparison in the same seeing before moving on.
There was enough time to check one instrument block.  I considered
GRIM, which has the smallest field of view and is therefore most
sensitive to changes in the boresight, but I decided on DIS because it
was already mounted and because the boresight position is critical for
tracking in different rotations.
I started with a focus check of DIS, comparing the focus on the
instrument to the focus on the slitviewer.  I found a difference of
100-150 steps (see focus log), showing that the slitviewer focus needs
work.  However, small changes in the slitviewer focus are much easier
to do with two people, so I left it and moved on to the next step.
Observing specialists should note that the correct focus is about 150
steps higher than the best focus on the slitviewer, until it can be
adjusted again.  I updated all five instrument blocks for the change
in focus zeropoint, so after tonight 0 should be a good starting
estimate for any instrument.
I checked the DIS instrument block, which appeared to be good.  Some
of the measurements for the new block came out rather strange, so
after consideration I recorded the values but restored the old
instrument block.  The center of rotation is on the slit and should
allow for good pointing and tracking.
		            OBSERVER COMMENTS
                                FOCUS LOG
Time	Instrument   Focus     Az  El   #Temp     Dir  MPH  filt FWHM "
22:30   SH	   500(1766)   46  82  12.6/14.4   60   11
03:50   DIS(red)   400(995)   -68  57  10.9/10.9   74   13   --  1.98
04:05   DIS(slit)  250(954)   -68  55  10.7/10.7   78   13   --  1.36
#First temp is air, second temp is telescope.
                                 WEATHER
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     17:01    62    46      0   234  (SW)     715     cloudy     none
     18:01    61    38      0    95  (E)      478     cloudy     none
     19:01    57    43      5    61  (ENE)    925     cloudy     rain
     20:01    49    44     15    98  (E)      701     cloudy     rain
     21:01    54    38     23    32  (NNE)    282     cloudy     none
     22:01    54    40     16    76  (ENE)    677     clear      none
     23:01    57    36      0   241  (WSW)    355     hazy       none
     00:01    53    39     11   119  (ESE)    333    ptly cldy   none
     01:01    53    42     13   126  (SE)     564    ptly cldy   none
     02:01    52    44     12    83  (E)      667    ptly cldy   none
     03:01    52    45     11    70  (ENE)    880    ptly cldy   none
     04:01    52    44     11    78  (ENE)   1345    ptly cldy   none
     05:01    51    43      9    61  (ENE)    573    mstly clr   none
     06:01    50    44     10    81  (E)      675    mstly clr   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
> 1 micron per 0.1 cu. ft.
                             TELESCOPE STATUS
Primary, secondary, and tertiary mirrors in place and collimated.
Primary support system operational.  Mirror ventilation system in
place.  Telescope drives operational.  Current Remark version: 2.62.
Current guide software version: GIm Ctrlv3.0b27.  Current TCC version
is 2.4.0b1.  Current MC version: v1_7_3.
- frank, Russet McMillan