Date: Mon, 19 Apr 1999 06:33:20 -0600 (MDT)
From: Russet McMillan
Subject: 3.5m Night Log 990418
                          SUNDAY APRIL 18, 1999
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
York            Mallouris           Echelle   4/18-19  21:02 05:02
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC02/R     21:02 05:02    0    0    0    0   6.3  1.7   0    0    0
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
1st half observing specialist: Karen Gloria
The telescope was opened at 18:30 MDT.  Chris Mallouris observed
remotely with the echelle.  No problems of note.
There was a large magnesensor error in the altitude axis at the
beginning of the night.  This was easily corrected.
I had to realign the finder scope for DIMM.  I hadn't tightened the
screws enough when I last aligned it, so this was my own doing, but it
was a pain anyway.
*The DIS transfer dewar wasn't keeping the camera dewars cold, so I
had to switch to one of the large transfer dewars.  It has a 15 psi
valve on the vent, to reduce the pressure.
2nd half observing specialist: Russet McMillan
Second half went very well: good weather, excellent seeing, telescope
and instrument behaving themselves.  DIS appeared to maintain
temperature adequately with the big dewar hooked up.
                            OBSERVER COMMENTS
                                FOCUS LOG
                              APRIL 18 1999
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
20:45 echelle -1120(5291)   166  60  8.4/9.1   266   6   none  0.86
22:20 echelle -1050(5388)   141  50  8.4/8.7   260   6   none  1.0
00:15 echelle -1000(5540)   245  39 10.1/9.8   265  11   none  0.96
03:15 echelle -1080(5355)   137  54  7.6/8.8   254  12   none  0.97
#First temp is air, second temp is telescope.
                                 WEATHER
                              APRIL 18 1999
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    53     9      6   276  (W)      788    ptly cldy   none
     17:01    52     9     11   251  (WSW)    675    ptly cldy   none
     18:01    51     8      9   228  (SW)     727    ptly cldy   none
     19:01    50     7      6   265  (W)      740    ptly cldy   none
     20:01    48     4      5   252  (WSW)    893    ptly cldy   none
     21:01    48     5      6   264  (W)      914    ptly cldy   none
     22:01    48     5      6   253  (WSW)    806      clear     none
     23:01    49     5      8   241  (WSW)    686      clear     none
     00:01    50     6      8   268  (W)      603      clear     none
     01:01    50     6      8   270  (W)      553      clear     none
     02:01    49     4     12   272  (W)      510      clear     none
     03:01    49     2      7   259  (W)      565      clear     none
     04:01    47     2      5   203  (SSW)    554      clear     none
     05:01    47     3      2   197  (SSW)    578      clear     none
     06:01    45     1      2   196  (SSW)    690      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 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: 2.52
Current guide software version: GIm Ctrlv3.0b17.
- Karen Gloria, Russet McMillan