From: Russet McMillan
Subject: 3.5m Night Log 990723
Date: Sat, 24 Jul 1999 05:23:15 -0600 (MDT)
                           FRIDAY JULY 23, 1999
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Krisciunas      Krisciunas         SPIcam       7/23   21:45  22:45
Duncan          Duncan             Echelle    7/23-24  22:45  04:35
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UW02/R     21:45  22:45   -    0    -    0    -   1.0   0    -    0
UC03/R     22:45  04:35  0.5  0.5  0.2   0   0.8  3.8   0    0    0
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
Observing specialist: R. McMillan
A clear night with subarcsecond seeing, where the open time
significantly outweighed the closed time!  We opened a little late
during twilight due to nearby rainfall, but still early enough to get
some twilight flats with spicam.  After that, the night was lovely
until the humidity went up.  Technically, it didn't quite reach the
limit, but with the level of condensation on objects outside, and with
the telescope being nearly a degree cooler than the air, I decided to
close from 02:35 to 03:35, when the dewpoint dropped again.
The telescope and instruments behaved well, aside from a few small
glitches: the cloud camera got stuck in the north, and around the same
time there was a slowdown in communications -- local as well as
remote.  This included slow response to commands, messages
disappearing into the ether, and Remark not updating the telescope
position during a slew (although the TCC was fine).  The first signs
were noticed during a slew at around 03:45, but it bogged down
completely ten or fifteen minutes later.  Restarting the MC and Remark
seemed to clear up the problem, costing about ten minutes of downtime
altogether.
                            OBSERVER COMMENTS
                                FOCUS LOG
                              JULY 23 1999
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
21:15  SPIcam   -150(6680)  226  40 15.5/16.2  181   12   R    0.87
22:45  Echelle   -39(5810)    0  63 15.0/15.2  197   14  clear 0.83
02:20  Echelle   -59(5763)  -35  46 13.8/12.9  203    6  clear 0.82
#First temp is air, second temp is telescope.
                                 WEATHER
                               JULY 23 1999
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    63    49      8   189  (S)      240     ptly cldy  none
     17:01    63    49      8   179  (S)      233     ptly cldy  none
     18:01    64    46      5   187  (S)      308     ptly cldy  none
     19:01    63    48     13   214  (SW)     267     ptly cldy  none
     20:01    61    47      9   185  (S)      323     ptly cldy  none
     21:01    60    47     11   178  (S)      440     mstly clr  none
     22:01    60    47      9   175  (S)      475      clear     none
     23:01    59    47     10   181  (S)      458      clear     none
     00:01    57    50      7   181  (S)      457      clear     none
     01:01    57    50      5   181  (S)     1645      clear     none
     02:01    57    51      4   183  (S)     1435      clear     none
     03:01    56    51      1   198  (SSW)    791      clear     none
     04:01    57    48      7   182  (S)      810      clear     none
     05:01    57    49      7   181  (S)      957      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.
- Russet McMillan