Date: Sat, 11 Apr 1998 05:32:11 -0600 (MDT)
From: Karen Gloria
Subject: 3.5-m obslog 980410
                          FRIDAY APRIL 10, 1998
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Stubbs     Diercks, Morgan, Stubbs   SPIcam   4/10-11  20:55 01:10
Connolly         Szokoly             GRIM2      4/11   01:10 05:13
 INST        SCHEDULED      OBS      WEATH     EQUIP   DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
EN01/R     20:55 01:10    -   4.3   -    0    -    0    0    -    0
JH03/R     01:10 05:13    -   2.9   -   1.2   -    0    0    -    0
(note: times listed include instrument change time)
                               ACTIVITY LOG
(* means a trouble report has been issued or appended to)
The telescope was opened at 19:00 MDT.  The weather was very good,
although dust became a problem late in the night.  I closed at 4:00
MDT due to that.  Chris Stubbs, Jeff Morgan, and Alan Diercks
continued their tests for EN01 (details below).  Gyula Szokoly
observed with GRIM2 for JH03.
			     OBSERVER COMMENTS
Stubbs et al. - "This was a very productive run. We took pinhole
camera images to check for stray light at different pointings relative
to the moon, to aid in baffle designs. We checked dependence of image
quality on pointing relative to ~18 mph wind, and were very pleased to
find that FWHM was the same pointing into and away from the wind. This
means the bracing on the top end is working well! Also tested
stability of guider focus relative to SPIcam focus. We had (in R band
at about 1.1 airmasses) steadily subarcsec images with no 'focus
jumps' or anomalies. We *certainly* have a site that can deliver
subarcsec images on a regular basis. More detailed analysis will
follow..."
                                 FOCUS LOG
                               APRIL 10 1997
                  Best   Telescope           Wind            Seeing
Time   Inst      Focus    Az  El   #Temp    Dir MPH  filter  FWHM "
20:10 SPIcam  -200(6240) 140  73  9.6/10.6  172  16    R      0.72
01:30 GRIM2   -100(6496)   0  48  9.2/8.2   173  14    J      1.4
#The first temp is air, the second is truss, both in degrees Celsius
                                 WEATHER
                              APRIL 10 1997
                                   Wind
    Time  Temp F  Dewp. F  MPH.	  Dir.       Dust     Sky       Precip.
     16:01    56    11     16   195  (SSW)    997    clear       none
     17:01    57    13     15   222  (SW)     947    clear       none
     18:01    55    11     16   216  (SW)     892    clear       none
     19:01    52    10     13   192  (SSW)   1030    clear       none
     20:01    50     6     13   186  (S)     1057    clear       none
     21:01    48     7     15   163  (SSE)   1257    clear       none
     22:01    48     6     17   153  (SSE)   1295    clear       none
     23:01    50     3     18   164  (SSE)   1181    clear       none
     00:01    48     5     16   145  (SE)    1209    clear       none
     01:01    48     7     14   175  (S)     1372    clear       none
     02:01    49     5      9   184  (S)     1205    clear       none
     03:01    46    13     18   153  (SSE)   1580    clear       none
     04:01    45    14     19   153  (SSE)   1837    clear       none
     05:01    45    19     19   152  (SSE)   1788    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: 2.39.
Current guide software version: GIm Ctrlv3.0b11.
-Karen