From: "Noel Camron Hastings"
Subject: 3.5-m Night Log 2000.04.21
Date: Sat, 22 Apr 2000 04:10:15 -0700
                         Friday, April 21, 2000
                        APACHE POINT OBSERVATORY
                              Observing Log
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)   INSTRUMENT       DATE    START  FINISH
--------------------------------------------------------------------
S.Anderson      S.Anderson    DIS-L, 1.5"     4/21-22  --:--   --:--
S.Austin        S.Austin      DIS-L, 2.0"     4/22     --:--   --:--
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
--------------------------------------------------------------------
UW01/R     20:34  01:00  2.0  1.4   0    0    0    0    -    0    0
WS01/R     01:00  05:29   -   5.5   -    0    -    0    -    -    0
(note: times listed include instrument change time)
                      -------- ACTIVITY LOG --------
Observing Specialist: Camron Hastings
	Thick clouds prevented opening all night, as did the rain to the south.
When filling instruments I noticed that the GRIM temps are working
again. In addition, DIS is 4 degrees warmer than normal on the red side
and about 3 degrees warmer on the blue. The bias frames had an odd look
to them.(/export/images/apr21.0001-5r.fit) I wiped the chips for about
5-10 mins and this cleared most of it up, but I am concerned as to why
the temp is high. Could it need pumping down? I topped the LN2 but this
had no effect. As the night wore on the temps dropped again.
	I cleaned the work table on the 3.5-m observing level. It is getting
very cluttered with bolts and tools and such and makes it hard to do
filter work up there. Could we make an effort to keep that area clean. I
did not know what to do with all the odds and ends, so they are all in a
metal 'odds and ends' can. I returned what tools I could and left
	I cleaned the drive surfaces, the telescope az drive surface was quite
dirty. Also, I taped over the open electrical outlets on the new cloud
scanner UPS to avoid unwanted water from entering.
	It started raining at 20:20 MDT with less than 30% relative humidity
and a dew point depression of over 18 degrees! Just to keep us on our
toes... Cloud scanner got a light sprinkle, glad I taped it up.
                            OBSERVER COMMENTS
                                 - None -
                                FOCUS LOG
                              April 21 2000
                                                  Wind
Time   Inst        Focus     Az  El   Temp*    Dir  MPH  filt   FWHM"
-----------------------------------------------------------------------
*First temp is air, second temp is telescope superstructure.
                                 WEATHER
                              April 21 2000
                           Wind  Wind
     Time   Temp F Dewp F  MPH   Direction    Dust      Sky      Precip.
     -------------------------------------------------------------------
     16:01    65    22     10   198  (SSW)   1546    Ptly Cldy    None
     17:01    64    21     12   190  (S)     1680    Ptly Cldy    None
     18:01    63    21     20   201  (SSW)   1641      Cloudy     None
     19:01    59    20     19   205  (SSW)   1819      Cloudy     None
     20:01    57    20     17   185  (S)     1814      Cloudy     Rain
     21:01    55    24     17   143  (SE)    2377      Cloudy     Rain
     22:01    54    26     29   126  (SE)    2612      Cloudy     None
     23:01    54    27     21   149  (SSE)   4385      Cloudy     None
     00:01    55    25     10   143  (SE)    4079      Cloudy     None
     01:01    53    21     19   188  (S)     2486      Cloudy     None
     02:01    53    18     13   187  (S)     1944      Cloudy     None
     03:01    51    18     14   179  (S)     1811      Cloudy     None
     04:01    51    15     19   213  (SSW)   1109      Cloudy     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 2.2.6.
                                   - Camron Hastings