From: "Camron Hastings"
Subject: 3.5-meter Night Log 080698
Date: Fri, 7 Aug 1998 04:54:17 -0600
			      Thursday, August 6th 1998
			     APACHE   POINT  OBSERVATORY
				 3.5-Meter Observing Log
                                 ACTUAL
ASTRONOMER      OBSERVER(S)      INSTRUMENT     DATE     START  FINISH
----------------------------------------------------------------------
Gillespie       Hastings	    SPIcam       8/06-07   21:28  04:50
 INST        SCHEDULED       OBS      WEATH     EQUIP    DAY   NOTUSED
I/RS/DN    START FINISH    D    B    D    B    D    B    USE   D    B
----------------------------------------------------------------------
EN01/S     21:28  04:50    0   4.0   0   3.2   0    0     0    0    0
				      ACTIVITY LOG
	We opened tonight at 20:30 to clear skies, and humidity that was not
quite as promising, but held long enough for some tasks to be
accomplished. The dewpoint depression was slightly below the limit for
opening, but careful monitoring of conditions allowed me to stay open
for the following tasks. When opening the enclosure it was found that
the louvers and the pressurization fan did not run, and could not be
operated. Other fans and commands worked fine.
	The night started by getting sky flats for the guider to test the new
NA2 louver system. It looks pretty good, and we are not suffering from
any noticeable obstruction.
	First, I took some SPIcam sky flats in V, they looked quite nice. After
twilight I began on the new SPIcam instrument block. Telescope and
instrument performed fine. The new block was not significantly different
from the previous, telling me that the minor amount of disassembly that
took place during the shutdown did not affect the chassis much. Pointing
after the block showed it to be correct.
	Second, I tried to get guider block data. Guider focused fine and the
block went fine. Again, no major deviations from the original block
data, and a pointing afterwards confirmed the correct information.
	During all this block data, and various slewing around the sky, I came
to the decision to put the pointing model at the bottom of the list. The
telescope placed the intended object in the dead center every time, with
both the guider as instrument, and SPIcam. I don't feel that there is
any major need to redo the block right away.
	After the instrument blocks were complete, I simply tried to image with
SPIcam. I chose the lens object 2237 from PU01 for these tests so that
we could at least get some science value out of it.	The seeing was very
poor for this object, and though SPIcam and the guider performed fine, I
gave up after 3 images as they were mush.
	I mounted DIS for the second half of the night to take some spectra,
but found the dew point depression getting too low. I closed
at 01:28. After closing, I tried to start doing lamp cals with DIS, but
found that the Obs Mac had to be restarted because the mouse unplugged.
Nice feature, unplug the mouse, reboot the computer. Anyway, after
restarting, I could not get REMARK to log into the MC. It kept saying
that the command 'timed out'.
	After about 30 minutes of this, I tried to test the slit camera on DIS,
and found that it did not work. The 'CCDOPS' program simply says that
"No camera could be found. Please make sure it is connected to the
correct port." I tried to check the cabling on the PC and on DIS, but
found no broken connections. I also cycled all the calibration lamps on
and off to make sure they worked, all OK.
	No further instrument engineering took place tonight, but if the slit
camera can be fixed quickly, and the calibrations of the DIS gratings go
without a hitch, I believe that we could return to science observing,
and work out any small bugs as they arrive. Perhaps another 1/2 night is
necessary for DIS testing and GRIM images.
                                FOCUS LOG
                             August 6th 1998
                 Best     Telescope   Temp      Wind           Seeing
Time   Instrmt   Focus     Az  El   Air/Truss   Dir MPH  filter  FWHM"
----------------------------------------------------------------------
21:02  SPIcam    -50/6574  64  72  12.7/14.73   161 4.9    V      1.1"
                              WEATHER LOG
                            August 6th 1998
                                  Wind
     Time   Temp-F Dewp-F MPH   Direction    Dust      Sky      Precip
    ------------------------------------------------------------------
     16:01    57    49      1   274  (W)      261      clear     none
     17:01    58    49      3   288  (WNW)    258      clear     none
     18:01    58    51      1   213  (SSW)    361      clear     none
     19:01    58    49      0    37  (NE)     287      clear     none
     20:01    56    48      0   255  (WSW)    241      clear     none
     21:01    55    47      3   166  (SSE)    365      clear     none
     22:01    54    46      7   113  (ESE)    468      clear     none
     23:01    54    43      5   127  (SE)     387      clear     none
     00:01    52    43     10   106  (ESE)    580      clear     none
     01:01    52    45      5   118  (ESE)    685      clear     none
     02:01    54    44      2   231  (SW)     538      clear     none
     03:01    53    44      2   241  (WSW)    515      clear     none
     04:01    52    44      6   275  (W)      558      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 for the
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: 2.41a
Current guide software version: GIm Ctrl v3.0b 15.out
- Camron Hastings