From: Russet McMillan
Subject: 3.5m Night Log 20000311
Date: Sun, 12 Mar 2000 06:33:30 -0700 (MST)
                          SATURDAY MARCH 11, 2000
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Bowen            Kim                  DIS      3/11-12 19:02  05:24
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
PU02/R     19:02  05:24  0.0  0.0  0.0  0.0  5.4  5.0  0.0  0.0  0.0
(note: times listed include instrument change time)
                              ACTIVITY LOG
Observing Specialist: McMillan
The night was mostly clear with some light cirrus, and moderate to
good seeing.  At the beginning of the night, with the wind in the
north, the seeing on the guider was an excellent match for the DIMM
measurements.  After the wind shifted to the west around 01:30, the
guider and slitviewer were both getting much better seeing than DIMM.
The telescope tracking was excellent in object rotation, not so good
in horizon rotation -- I still urge DIS users to choose object
rotation whenever possible, especially for faint objects that can't be
seen on the slitviewer.
We had a few minor problems with DIS, including a refusal to move
gratings at the beginning of the night (solved by an extra home
command) and a few spectra written to disk in an illegible format due
to an illegally long comment line (solved by appeal to Craig for
help).  There was no significant time loss from either of these.
Observing the guider offsets, I didn't perceive any of the sinusoidal
behavior Eddie has been seeing, but for several objects I had to use
longer guider exposures.  I think any kind of fourier transform
analysis of the offsets will have to take the exposure time into
account very carefully because of the possibility of aliasing.
                            OBSERVER COMMENTS
                                FOCUS LOG
                              MARCH 11 2000
                                                  Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
19:25  DISslit    150(632)  113  30  3.7/4.3   355   13         1.6
21:30  DISslit      0(284)  144  51  1.8/2.2   338    9         1.3
02:10  DISslit     50(323)  199  55  1.9/2.5   222   11         1.05
#First temp is air, second temp is telescope.
                                 WEATHER
                              MARCH 11 2000
                               Wind
     Time   Temp F Dewp F  MPH   Direction    Dust      Sky      Precip.
     17:01    38     2      0    40  (NE)     183     mstly clr   none
     18:01    37    -6     12    11  (N)      307      clear      none
     19:01    39    -3      5   282  (WNW)    403      cirrus     none
     20:01    38     0      3   332  (NNW)    378     mstly clr   none
     21:01    38     0      3   348  (NNW)    354      cirrus     none
     22:01    35     2      6   331  (NNW)    272      cirrus     none
     23:01    38     2     10   267  (W)      291      cirrus     none
     00:01    38     4      7   267  (W)      362     mstly clr   none
     01:01    39     6     17   239  (WSW)    331      clear      none
     02:01    37     1      9   215  (SW)     381      clear      none
     03:01    35     2      5   200  (SSW)    745      clear      none
     04:01    36     1      6   266  (W)      871     mstly clr   none
     05:01    35     1      8   274  (W)     1021     mstly clr   none
     06:01    35    -1      9   278  (W)     1089     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
is 2.2.2.
- Russet McMillan