Date: Mon, 9 Jun 1997 07:07:00 -0600 (MDT)
From: Charles Corson
Subject: obslog 3.5m 970608
                          SUNDAYD, JUNE 8  1997
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                    ACTUAL
ASTRONOMER   INSTRUMENT DATE   START 	FINISH
Gordon		DIS	6/8    21:10    22:25
Mason		DIS     6/9    02:10    5:45
 INST            SCHEDULED       OBS     WEATH     EQUIP    DAY   NOTUSED
I/RS/DN         START 	FINISH  D   B    D    B    D    B   USE   D    B
DIS/UC08/R      22:51   01:00   1.2 0    2.0  0    0    0    0    0    0
DIS/NM10/O      01:00   04:14   0.5 0    2.7  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 with good conditions, clear skies with some small
clouds on occasion.  Seeing was the nominal 1.2"
*After yesterdays obslog, I saw that the slitcam was not responding to the
PC so, it is likely a victim of the the lightning from the previous night.
Craig Loomis determined today that the SBIG CPU is not communicating, some
diagnostics remains to be done.  Currently it is unusable.
*At 20:50, the rotator rotated to it's physical limit.  At the beginning
of the slew, the controller saw the encoder at 357,911 and wrapped fully.
No damage to the wrap-up was observed.  The rotator was unwrapped,
re-zeroed, and the telescope returned to service.  (rotator had passed
check out)
The dust count was high, 12-1500cnts, but at 22:20, pollen/dust was
observed to be particularly worse as observed in front of the dome.  The
dome was closed.  We remained closed as the wind shifted directly out of
the west and produced significant quantities of pollen/dust at the
catwalk.
At 02:10, the dust settled to 1200cnts and the dome was opened.  At 02:15,
we suffered two successive brown-outs.  The telescope was re-initialized
and tracked sufficiently to obtain a partial focus with DIS.  **At 02:25,
the azimuth axis began oscillating, and communication to the axis was lost
during query.  I re-booted TCC and control was regained.  -tracking due
west.
The brown-out caused a power failure condition for the dome motor
controllers.  A power reset cured the fault.
At 02:25, the dome was again closed due to increased pollen at the
catwalk and enclosure.
The dome was re-opened at 03:45 with good conditons and significantly
diminshed pollen/dust at the catwalk.  Paul Mason used the available time
to observe a Nova candidate confirmation, airmass ~4.  The Nova was well
exposed and several spectra were obtained in blue and red.
Utility power began to go at 05:20.  From 5:30 - 5:50, the site was on
generator power.  Brown-outs also occured at 02:25.
                                FOCUS LOG
                               JUNE 08, 1997
                  Best     Telescope          Wind             Seeing
Time   Inst      Focus      Az  El   #Temp    Dir MPH  filter   FWHM "
21:10  DIS       -100(6352) 239 57  11.1/11.5 250 11   R        1.2"
3:45   DIS       -100(6460) 265 62  9.0/9.2   278 8    B        1.3"
#first temperature is ambient, second is truss average temperature.
                                 WEATHER
                               JUNE 08, 1997
                                 Wind
    Time    Temp   Dewp.  MPH.   Dir.	     Dust Cnt    Sky       Precip
	    Deg F  Deg F		   Prtcle/cu-ft
     16:01    52    39     12   255  (WSW)   1510	clear      none
     17:01    58    41      9   245  (WSW)   1428	clear	   none
     18:01    57    39     11   258  (WSW)   1400	clear      none
     19:01    54    38     12   244  (WSW)   1366       clear      none
     20:01    51    35      8   210  (SSW)   1390       clear      none
     21:01    52    32      7   202  (SSW)   1431       clear      none
     22:01    52    32     11   260  (W)     1418       ltly cldy  none
     23:01    51    32     10   272  (W)     1549       cldy       none
     00:01    50    32     11   302  (WNW)   1526       cldy       none
     01:01    49    30     10   281  (W)     1405       ltly cldy  none
     02:01    49    27      9   277  (W)     1289	ltly cldy  none
     03:01    49    28     11   271  (W)     1309	clear      none
     04:01    48    31      8   276  (W)     1321       clear      none
     05:01    47    34      8   290  (WNW)   1371       clear      none
     06:01    47    32      8   303  (WNW)   1326       clear      none
note: the wind was coming from the azimuth listed.  The convention
used is north=0 degrees, east=90 degrees.
                             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: 2.36a.
Current guide software version: GIm Ctrl SI502 6.3.96.
-Charles