From: Russet McMillan
Subject: 3.5m Night Log 20000126
Date: Thu, 27 Jan 2000 06:34:51 -0700 (MST)
Content-Type: TEXT/PLAIN; charset=US-ASCII
                        WEDNESDAY JANUARY 26, 2000
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Morgan         Morgan, Davis,   Shack-Hartmann 1/26-27 18:26 20:50
             Loomis^2, Deglman
Morgan         Morgan, Davis    Shack-Hartmann  1/27   02:40 03:45
             McMillan, Deglman
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
EN01/R     18:26 06:06   3.7  5.7   0    0   1.4  0.9   0    0    0
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
1st half observing specialist: Loomis
The telescope was opened at 17:00 for a night of engineering with the
Shack-Hartmann image tester.  The first test was to see how soon after
sunset we can get useful S-H data.  In this test, the background level
in the S-H images remained too high until the end of Nautical twilight
(i.e. the scheduled start of science observing).
Wind shake made it difficult to get useful images.  We closed the
telescope at 19:00, due to high wind gusts, and reopened at 20:00.  We
had to close again at 20:50, due to clouds, dust, and high winds.
2nd half observing specialist: McMillan
The clouds, dust, and wind improved shortly after 01:00, but some
complications were showing up with the primary LVDT monitoring system,
and we didn't open until 02:40.  We got limited Shack-Hartmann data on
a few stars before thick clouds rolled in and we closed at 03:45.  We
did not have time to try out different tip/tilts or to do a pointing
model, but we obtained some indications of how the collimation varies
with altitude and the fact that these changes do not appear to be
caused by motions of the primary mirror.
                            OBSERVER COMMENTS
                                FOCUS LOG
                             JANUARY 26 2000
                                                 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
18:00  S-H     +600(1423)    80  65  4.2/5.0   245  21   none   -
18:25  S-H     +550(1338)    94  43  3.9/4.4   254  29   none   -
02:50  S-H     +400(878)    -88  67 -4.6/-3.1  305  19
#First temp is air, second temp is telescope.
                                 WEATHER
                             JANUARY 26 2000
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    43    24     26   259  (W)      634     clear      none
     17:01    43    25     22   249  (WSW)    453     clear      none
     18:01    39    26     23   250  (WSW)    474     clear      none
     19:01    39    26     25   240  (WSW)    570     clear      none
     20:01    37    25     22   268  (W)      616     clear      none
     21:01    36    19     33   289  (WNW)   3550     cloudy     none
     22:01    33    19     14   253  (WSW)   2662     cloudy     none
     23:01    31    15     22   283  (WNW)   6782     cloudy     none
     00:01    29    17     24   268  (W)     1769    ptly cldy   none
     01:01    26    18     18   297  (WNW)   1495    ptly cldy   none
     02:01    24    14     11   338  (NNW)    611   mstly clr    none
     03:01    24    14     15   308  (NW)     623    ptly cldy   none
     04:01    24    15     11   308  (NW)     696     cloudy     none
     05:01    24    15     12   292  (WNW)    685     cloudy     none
     06:01    24    16     14   303  (WNW)    628     cloudy     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
is 2.2.2.
- Karen Loomis, Russet McMillan