Date: Sat, 28 Nov 1998 07:09:55 -0700 (MST)
From: Russet McMillan
Subject: 3.5m Night Log 981127
			     Friday, November 27th 1998
			     APACHE   POINT  OBSERVATORY
				 3.5-meter Observing Log
                                 ACTUAL
----------------------------------------------------------------------
ASTRONOMER      OBSERVER(S)      INSTRUMENT     DATE     START  FINISH
----------------------------------------------------------------------
Harper          R.Evans          GRIM II       11/27-28  18:24  00:10
UWGRB           A.Diercks        SPIcam        11/28     00:10  05:18
----------------------------------------------------------------------
 INST        SCHEDULED     WEATH     EQUIP      OBS      DAY   NOTUSED
I/RS/DN    START  FINISH   D    B    D    B    D    B    USE   D    B
----------------------------------------------------------------------
UC06/R    18:24   00:10    -    0    -    0    -   5.8    0    -    0
DD01/R    00:10   05:18   0.5   0    0    0   3.8  0.8    0    0    0
                     -------- ACTIVITY LOG --------
1st half Observing Specialist: Camron Hastings
     I opened the dome today at 16:20 for cooling. Skies still laden
with cirrus, and getting worse. The DIS behaved all day with respect to
LN2 usage, about 15 lbs. of LN2 from ~06:00 until ~16:30. I began a
series of 100 darks on GRIM to test for any suprise problems but GRIM
seems to like this low humidity lately, all worked fine. Rhodri showed
up and started darks at around 17:15 and he was on his first science
target by 17:50. All seemed to run smoothly.
     There was no PU01 this evening as it was deemed unnecessary with
the last few nights of data results. Clouds grew thick near 22:00 but we
continued to try...
2nd half Observing Specialist: Russet McMillan
Second half started with variable clouds.  I closed for half an hour
starting at 02:15 when they became too thick to gain any useful data,
but they soon lightened to patchy cirrus again.  Towards the end of
the night, we were getting 0.8" seeing.  SPIcam behaved well, and no
background variations were reported (none of the targets were in the
NW).
              ------------ Observer Comments ------------
			       FOCUS LOG
                           November 27th 1998
                   Best    Telescope  Temp (C)    Wind          Seeing
 Time  Instrmt    Focus     Az   El   Air/Truss  Dir MPH  filter FWHM"
----------------------------------------------------------------------
17:40  GRIM II -030(6636) -010   54  11.7/10.4   257 1.7  f/5 KP 0.70"
21:10  GRIM II +020(6646)  334   38  10.3/ 7.8   259 8.4  f/5 KP 0.75"
00:20  SPIcam  -100(6343)  207   54   9.8/ 9.2   267  12   r'    1.0
00:25  guider 50500(6345)  209   53   9.6/ 9.3   270  14   R     1.2
03:00  SPIcam  -150(6317)   10   47   8.8/ 9.0   226  17   V     1.2
                               WEATHER LOG
                           November 27th 1998
                                  Wind
     Time   Temp-F Dewp-F MPH   Direction    Dust      Sky      Precip
    ------------------------------------------------------------------
     16:01    48    14      0     9  (N)             cirrus      none
     17:01    51     7      0   293  (WNW)           cirrus      none
     18:01    52     5      2   245  (WSW)           cirrus      none
     19:01    46    17      3   266  (W)             cirrus      none
     20:01    46    21      6   264  (W)             cirrus      none
     21:01    50     4      9   261  (W)             cirrus      none
     22:01    50     5      7   245  (WSW)           cirrus      none
     23:01    50     4      9   260  (W)             cirrus      none
     00:01    50    11      9   259  (W)             cirrus      none
     01:01    49    16      9   228  (SW)            cirrus      none
     02:01    49    21     10   247  (WSW)           cirrus      none
     03:01    48    23     13   243  (WSW)           cirrus      none
     04:01    44    24     13   232  (SW)            cirrus      none
     05:01    45    24     14   225  (SW)            cirrus      none
     06:01    47    22      9   225  (SW)            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: 2.42a
Current guide software version: GIm Ctrl v3.0b 15.out
- NCH, RM