From: Russet McMillan
Subject: 3.5m Night Log 20000614
Date: Thu, 15 Jun 2000 03:50:54 -0600 (MDT)
                          WEDNESDAY JUNE 14 2000
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Gillespie       McMillan, Stubbs,  SPIcam,     6/14-15 19:50  03:30
		Rest, Briggs,      S-H, Guider,
		Davis              DIMM
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
EN01/S     21:16  04:51   -    0    -    0    -   6.3   0    -   1.3
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
Observing Specialist: McMillan
The night was mostly clear, with light winds and some thin cirrus
during first half.  The seeing ranged widely, which turned out to be
good for the tests we spent most of the night on.
Jon Davis and I started with scattered-light tests, baffling the
secondary cage with several yards of blackout cloth around the
outside.  Pinhole images of the moon taken with the baffling in place
seemed pretty similar to the non-baffled images.  Perhaps someone else
can make more sense of the finer details.
Since the 2.5m was still doing tests and DIMM2 could not yet be set up
as planned, I focused SPIcam and went on to do some tracking tests.  I
finished a set of guided and blind tracking tests at one location
before Chris Stubbs logged in from Washington.  He tested out a SPIcam
script that would make multiple seeing measurements which could be
compared with DIMM.  While we waited for the 2.5m to finish their slew
tests, we made another S-H movie of Polaris.  (See the first one, made
possible by UW undergrad Annika Peter, at
http://www.astro.washington.edu/stubbs/seeingfilm.gif) Unfortunately,
the seeing had gotten considerably better just as we switched to the
Shack-Hartmann, so we didn't get to see a movie of bad seeing.
Once the 2.5m was stable and DIMM2 was up, we spent several hours
tracking a star near the north pole and comparing results from SPIcam,
the guider, DIMM1, and DIMM2.  These were generally consistent with
each other throughout the changes of the night, although there was
some trouble with repeated crashes of DIMM2, partially diagnosed over
the phone by John Briggs and Armin Rest.
		            OBSERVER COMMENTS
C. Stubbs:
we obtained seeing data using the 3.5m, the DIMM adjacent to the 3.5m
enclosure, and a second DIMM mounted on the SDSS pier. The objective
is to determine correlations between delivered image quality on the 3.5m
and the DIMM estimates from the 2 locations.
                                FOCUS LOG
Time	Instrument   Focus    Az  El    #Temp    Dir MPH  filt  FWHM "
22:00   SPIcam    -120(561)  114  61  13.2/15.2   64  17   R    1.72
22:05   Guider   -2500(561)  114  61  13.2/15.2   64  17   R    2.2
#First temp is air, second temp is telescope.
                                 WEATHER
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     17:01    72    27     13   271  (W)      323   lt cirrus    none
     18:01    68    28      8   296  (WNW)    507   lt cirrus    none
     19:01    70    29      6   301  (WNW)    520   lt cirrus    none
     20:01    64    31      6   272  (W)      551   lt cirrus    none
     21:01    56    38     15    65  (ENE)    628   lt cirrus    none
     22:01    57    37     11    53  (NE)     669   mstly clr    none
     23:01    57    35      9    57  (NE)     705   mstly clr    none
     00:01    60    32      7   355  (N)      684   mstly clr    none
     01:01    60    33      6   297  (WNW)    644   mstly clr    none
     02:01    59    33      7   210  (SSW)    616    clear       none
     03:01    58    35      5   181  (S)      823    clear       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: 2.55b5.
Current guide software version: GIm Ctrlv3.0b27.  Current TCC version:
2.3.1.  Current MC version: 1.7.2.
- Russet McMillan