From: Russet McMillan
Subject: 3.5m Night Log 20000118
Date: Wed, 19 Jan 2000 07:09:41 -0700 (MST)
                         TUESDAY JANUARY 18, 2000
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Chanover       Chanover, Hillman      AOTF    1/18-19  22:30 01:10
               Meyers, Kuehn
York             Mallouris           Echelle    1/19   01:10 06:08
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
NM02/S     18:19 01:10    -   4.2   -    0    -   2.6   0    -    0
UC09/R     01:10 06:08    0    0    0    0   0.7  4.3   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: Loomis
The telescope was opened at 22:30 MST.  Opening was delayed by
clouds.  After we opened, we obtained a new instrument block for the
AOTF.
While we were closed we looked at the pointing model data.  Several
stars had large altitude errors.  Jon and Craig looked at the A sector
of the PMSS and found that it isn't behaving quite as it should.  This
would explain the problems Russet reported having last night while
trying to take pointing model data and would explain the large
altitude errors in in some of the data points.  It may also explain
the altitude motion we saw last night when the telescope exhaust fans
were turned on and off.  Because the pointing model data were possibly
corrupted by the misbehavior of the A sector of the PMSS, I decided to
revert to the old model.  This meant reverting to the old 2ndary
tip-tilts as well.
2nd half observing specialist: McMillan
Second half was very peaceful, with the echelle and telescope both
behaving well.  Weather was cirrusy with good seeing, consistent with
the last few nights.
                            OBSERVER COMMENTS
                                FOCUS LOG
                             JANUARY 18 2000
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
22:55  AOTF    +170(   )     49  60  7.7/8.5   263  15    H     ?
23:45  AOTF    +225(   )    307  61  7.4/7.7   274  12    H     ?
01:15  Echelle  100(202)    154  59  6.8/6.9   285  15   clear 0.77
02:35  Echelle   60(129)    194  61  6.6/6.4   302  19   clear 0.82
#First temp is air, second temp is telescope.
                                 WEATHER
                             JANUARY 18 2000
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    55    17      6   256  (WSW)   1038   ptly cldy    none
     17:01    48    15      7   303  (WNW)    893   mstly cldy   none
     18:01    48    14      8   274  (W)     1051   mstly cldy   none
     19:01    47    14      7   274  (W)     1196   mstly cldy   none
     20:01    48    11     12   267  (W)      834   mstly cldy   none
     21:01    47     9      8   267  (W)      637   mstly cldy   none
     22:01    45    13     13   249  (WSW)    888   ptly cldy    none
     23:01    46    14     13   263  (W)      936   ptly cldy    none
     00:01    45    14     10   280  (W)      818   ptly cldy    none
     01:01    45    13     12   284  (WNW)    780    cirrus      none
     02:01    44    14     17   295  (WNW)    810    cirrus      none
     03:01    44    15     21   299  (WNW)    824   mstly clr    none
     04:01    43    15     16   322  (NW)     830    cirrus      none
     05:01    44    15     19   299  (WNW)    798   mstly clr    none
     06:01    43    15     16   319  (NW)     811    cirrus      none
     07:01    43    14     17   327  (NNW)    824    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: 2.55b5.
Current guide software version: GIm Ctrlv3.0b27.  Current TCC version
is 2.2.2.
- Karen Loomis, Russet McMillan