From: Russet McMillan
Subject: 3.5m Night Log 20000621
Date: Thu, 22 Jun 2000 05:45:32 -0600 (MDT)
                          WEDNESDAY JUNE 21 2000
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Stephens        Stephens           GRIM         6/21   21:18  01:00
Leeber          Leeber             GRIM         6/22   01:00  04:52
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
NM03/S     21:18  01:00   0    0    0    0   2.5  1.2   0    0    0
NM01/R     01:00  04:52   -   2.1   -   0.3   -   1.5   0    -    0
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
Observing Specialist: McMillan
The night was partly cloudy, with good seeing and threatening
humidity.  We closed at 01:55 when the dewpoint got too close to the
secondary temperature.  We tried opening again at 02:45, but the
improvement was only brief and we reclosed 15 minutes later.  At last
the wind changed and we were able to stay open from 04:10 until
twilight.
During checkout, the rotator ran away several times in the clockwise
direction by more than 90 degrees, requiring a stop button to halt it.
I re-measured the VEL.OUT.SCALE and adjusted it to be closer to the
clockwise velocity.  After that, I had no further problems.  The
reason for the change in velocity is unknown.
There were no problems with the instrument during first half.  When
the observers changed over, we found a problem in the way the MC was
handling comments in the image headers, which cost about 20 minutes of
open time.  It wasn't a problem for the first observer, who used no
comments.  Craig fixed the difficulty within a few minutes once he was
contacted.
		            OBSERVER COMMENTS
                                FOCUS LOG
Time	Instrument   Focus    Az  El    #Temp    Dir MPH  filt  FWHM "
21:45   GRIM(f/10) -125(765) 286  58  13.6/15.5   81  10   K    0.79
23:25   GRIM(f/10)   50(734) 294  63  14.7/14.0  139   9   K    0.72
01:35   GRIM(f/10)  -25(   ) 107  70  11.6/12.9  198  13   J    0.84
#First temp is air, second temp is telescope.
                                 WEATHER
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     17:01    66    38      4   242  (WSW)    215    mstly clr   none
     18:01    70    42     11   210  (SSW)    175    ptly cldy   none
     19:01    67    39      9   125  (SE)     223    ptly cldy   none
     20:01    56    44     13    78  (ENE)    411    ptly cldy   none
     21:01    56    42      7    82  (E)      338    ptly cldy   none
     22:01    57    43     11    76  (ENE)    396    ptly cldy   none
     23:01    57    43      8   105  (ESE)    380    mstly clr   none
     00:01    58    40      5   182  (S)      276    mstly clr   none
     01:01    55    43     19   204  (SSW)    346    ptly cldy   none
     02:01    53    48     11   177  (S)     2347    ptly cldy   none
     03:01    50    47      1   175  (S)     2081    mstly clr   none
     04:01    55    46      2   186  (S)     1420    mstly clr   none
     05:01    54    46      1   165  (SSE)    582    mstly clr   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: 2.55b5.
Current guide software version: GIm Ctrlv3.0b27.  Current TCC version:
2.3.1.  Current MC version: 1.7.2.
- Russet McMillan