From: "Camron Hastings"
Subject: 3.5-meter Night Log 980823
Date: Mon, 24 Aug 1998 05:34:47 -0600
			      Sunday, August 23rd 1998
			     APACHE   POINT  OBSERVATORY
				 3.5-Meter Observing Log
                                 ACTUAL
ASTRONOMER      OBSERVER(S)      INSTRUMENT     DATE     START  FINISH
----------------------------------------------------------------------
S.Hameed	    S.Hameed         DIS          8/23-24    21:06  00:55
D.Zucker        D.Zucker         DIS            8/24     01:25  05:05
 INST        SCHEDULED       OBS      WEATH     EQUIP    DAY   NOTUSED
I/RS/DN    START  FINISH   D    B    D    B    D    B    USE   D    B
----------------------------------------------------------------------
NM05       21:06  00:55    0    0   3.6   0    0    0     0    0    0
UW03       01:25  05:05   1.2   0    0    0   2.5   0     0    0    0
				      ACTIVITY LOG
	Telescope opened tonight at 21:30, clouds had slowed us down. The thick
clouds eventually dissipated, though high cirrus kept moving in and out,
thus ruining NM05's ability, as they needed photometric conditions. Dan
Zucker came on at 01:25.
	The guider issue from last night has been resolved, mostly. Tonight
when running tests on it, I noticed that the piston focus values are way
out of whack. Normally they run from anywhere between 49000 and 56000,
but tonight they are at 25000, very low. Also, about 1/3 of the field is
obscured. This obscuration cuts across the upper area of the frame, and
in a straight line, so I do not think that it is due to the baffling, as
they are circular. There is an image in /export/images named
guide0823.01.fits, if anyone is interested in seeing it. My guess is
that when some work on the rotator was done last week the mirror
assembly was impacted somehow. This would also explain the fact that the
gmech power was switched off, and the switch is kinda hard to
accidentally hit, but that is all I can think of.
	Around 02:30 we seemed to have lost the altitude drive. I shut the
motors on and off, re-inited them, and we regained it, but we were
plagued with weird little tracking problems most of the night, probably
mostly due to this motor problem. Around 04:00 the altitude drive
failed, and I could not get it back online. During these failures, I
never received notice from REMARK or anything that things were
malfunctioning. I went up to the enclosure and checked things out,
manually drug the telescope down to horizon to make sure there were no
moths or other obstructions, and after this I re-inited and we had
altitude again. I am perplexed...all seems fine. Lost altitude later,
could not regain it reliably. Also, when closing, I could not slew, I
kept getting an error saying something like "mag sensor error too great
to correct". What a night...Also, to end it, I could not issue any slew
commands after 04:50. I tried a few things, but was always greeted with
errors, so I tied it now where it was sitting, about 180 degrees out
from normal position...
	-Camron Hastings
                                FOCUS LOG
                             August 23rd 1998
                 Best     Telescope   Temp      Wind           Seeing
Time   Instrmt   Focus     Az  El   Air/Truss   Dir MPH  filter  FWHM"
----------------------------------------------------------------------
23:50  DIS     +100/6787  166  60   14.6/13.6   356 8.1    -     1.81"
                              WEATHER LOG
                           August 23rd 1998
                                  Wind
     Time   Temp-F Dewp-F MPH   Direction    Dust      Sky      Precip
    ------------------------------------------------------------------
     16:01    65    51      0   257  (WSW)    698     Clouds     None
     17:01    69    53      5   207  (SSW)    664     Clouds     None
     18:01    63    49      1   187  (S)      740     Clouds     None
     19:01    64    48      0   254  (WSW)    702   Ptly Cldy    None
     20:01    62    44      6    71  (ENE)    693   High Cirrus  None
     21:01    59    45      9    85  (E)      817   High Cirrus  None
     22:01    58    45      8    95  (E)      737   High Cirrus  None
     23:01    57    45     10    78  (ENE)    778   High Cirrus  None
     00:01    56    45      8    46  (NE)     836   High Cirrus  None
     01:01    57    45      4   346  (NNW)   1073   High Cirrus  None
     02:01    59    45      7   357  (N)     1001   High Cirrus  None
     03:01    58    45      6   314  (NW)     873   High Cirrus  None
     04:01    57    46      6   282  (WNW)    810   High Cirrus  None
     05:01    57    47      3   265  (W)      798   High Cirrus  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: 2.42
Current guide software version: GIm Ctrl v3.0b 15.out