Date: Mon, 21 Dec 1998 07:25:23 -0700 (MST)
From: Russet McMillan
Subject: 3.5m Night Log 981220
                         SUNDAY DECEMBER 20, 1998
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Turner           Gloria              SPIcam    12/20   18:29 19:19
Diercks          Diercks             SPIcam  12/20-21  19:19 00:10
Wyder            Wyder               SPIcam    12/21   00:10 05:33
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
PU01/S     18:29 19:19    0    0    0    0   0.4  0.4   0    0    0
DD01/R     19:19 00:10    0    -    0    -   4.9   -    0    0    -
UW10/R     00:10 05:33   1.6   -    0    -   3.8   -    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 16:00.  We had cirrus clouds and 20 - 30
mph SW wind all evening.  The wind made it somewhat difficult to
observe objects in the southwest.  Windshake was evident in guide
camera images taken facing directly into the wind.
2nd half observing specialist: Russet McMillan
The clouds cleared off shortly after 01:00 (we had the only patch of
clear skies in the southwest), but the wind kept flirting with the
limit.  At 03:40 I closed due to high wind gusts.  I re-opened at
05:15 after the wind gusts had remained below the limit for nearly 45
minutes.  *When I re-opened, the telescope started moving as soon as I
unpushed the last stop button.  Wasn't this supposed to have been
fixed?
We had another local/global network freeze-up at 01:20, lasting for
several minutes.  Remark froze, my window to galileo hung up, etc.
After two or three minutes, everything recovered, and no observing
time was lost.  This time, unlike last night, it was not necessary to
restart Remark.
                            OBSERVER COMMENTS
                                FOCUS LOG
                             DECEMBER 20 1998
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
18:15  SPIcam   -150(6034)  225  50  2.8/2.8   214  25    r'    1.7
18:25  guider  51055(6036)  226  49  3.0/2.7   221  26    R     2.0
18:55  SPIcam   -140(6026)  135  51  2.5/2.6   229  18    g'    1.7
19:30  SPIcam   -175(6022)  129  44  2.3/2.5   229  16    r'    1.2
00:30  SPIcam   -150(5913)   36  66  1.1/1.4   233  27    V     1.5
#First temp is air, second temp is telescope.
                                 WEATHER
                             DECEMBER 20 1998
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    38    15     23   208  (SSW)           cirrus      none
     17:01    36    15     22   209  (SSW)           cirrus      none
     18:01    37    13     25   234  (SW)            cirrus      none
     19:01    36    13     21   238  (WSW)           cirrus      none
     20:01    37     8     23   224  (SW)            cirrus      none
     21:01    37     7     24   245  (WSW)           cirrus      none
     22:01    37     7     22   234  (SW)            cirrus      none
     23:01    36     9     25   217  (SW)            cirrus      none
     00:01    35     7     26   224  (SW)            cirrus      none
     01:01    34     8     31   223  (SW)             clear      none
     02:01    34     8     24   250  (WSW)            clear      none
     03:01    33     9     33   222  (SW)             clear      none
     04:01    34     6     30   223  (SW)             clear      none
     05:01    33     5     28   215  (SW)            cirrus      none
     06:01    33     5     25   217  (SW)            cirrus      none
     07:01    31     7     24   203  (SSW)           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 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: 2.42a.
Current guide software version: GIm Ctrlv3.0b15.
- Karen Gloria, Russet McMillan