Date: Sat, 19 Jul 1997 04:25:43 -0600 (MDT)
From: Charles Corson
Subject: 3.5m obslog 970718
                           FRIDAY JULY 18, 1997
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                    ACTUAL
ASTRONOMER   INSTRUMENT   DATE   START FINISH
Takamiya     Grim         7/18   21:50 23:50
Engr         DIS          7/19   --    --
Corson       DIS          7/19   --    --
 INST        SCHEDULED      OBS      WEATH     EQUIP   DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC02/R     21:48 01:10    0    0.4  0    1.9  0    1.1  0    0    0
EN01/O     01:10 03:30    0    0    0    2.4  0    0    0    0    0
PU01/O     03:30  04:31   0    0    0    1.0  0    0    0    0    0
(note: times listed include instrument change time)
                               ACTIVITY LOG
(* means a trouble report has been issued or appended to)
The dome was opened at 21:50 with marginal conditions.  Marianne Takamiya
observed for the UC02 program using Grim in Imaging mode.  However, due to
telescope axis failures, and weather, no useful data was obtained.
Pointing was found to be substantially off.  In trying to resolve this, the
telescope was moved, first in azimuth, then in elevation.  The move in elevation
resulted in an elevation overshoot.  The overshoots continued and I was able to
obtain a hard copy of the TACH, MOTOR CURRENT, and INPUT.  The azimuth drive also
overshot (and overshot also when closing).
The dome was closed at 23:25, primarily due to clouds, but we remained closed
throughout the night due to dust.
We now have a dust monitor in the dome.  It was noted that, while open, the dust
counts followed the tower monitor relatively well, especially as the dust counts
rose.
Conditions were not favorable for the Engineering time or the Lens monitoring
run.
A small fire was sited below the observatory, SE.  Karen notified the forest
department and Sunspot.  No evidence was seen that the fire continued, or had
spread througout the night or this morning.
                                FOCUS LOG
                              JULY 18, 1997
                  Best   Telescope           Wind            Seeing
Time   Inst      Focus    Az  El    #Temp    Dir MPH  filter  FWHM "
22:55  Grim  -325(6467)  214  71   16.8/18.3 27   2    K'      1.4
#The first temp is air, the second is truss, both in degrees Celsius
                                 WEATHER
                               JULY 18, 1997
                                   Wind
    Time  Temp F  Dewp. F  MPH.	  Dir.       Dust    Sky          Precip.
     16:01    69    41      8   136  (SE)    1029    cloudy       none
     17:01    75    42      7   188  (S)     1202    cloudy       none
     18:01    70    37     15   180  (S)     1146    cloudy       none
     19:01    67    37      6   183  (S)     1034    cloudy       none
     20:01    66    34     11   176  (S)     1110    cloudy       none
     21:01    61    41      9   355  (N)     1481    prtly cldy   none
     22:01    59    41      9   357  (N)      926    prtly cldy   none
     23:01    61    39      0    35  (NE)    1398    prtly cldy   none
     00:01    63    38     12   121  (ESE)   2071    prtly cldy   none
     01:01    61    39      8   145  (SE)    2537    cloudy	  none
     02:01    62    38     14   144  (SE)    2731    prtly cldy   none
     03:01    61    40     15   116  (ESE)   3038    prtly cldy   none
     04:01    59    41     14   152  (SSE)   3186    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: 2.36.
Current guide software version: GImCtrl.1 6.21.97.
-Charles