From: Russet McMillan
Subject: 3.5m Night Log 990725
Date: Mon, 26 Jul 1999 05:02:50 -0600 (MDT)
                           SUNDAY JULY 25, 1999
                         APACHE POINT OBSERVATORY
                              OBSERVING  LOG
                                                          ACTUAL
ASTRONOMER      OBSERVER(S)        INSTRUMENT   DATE   START FINISH
Duncan          Duncan             Echelle      7/25   21:43  22:50
Retherford      Retherford,        Echelle    7/25-26  01:05  02:10
                McCandliss
Duncan          Duncan             Echelle      7/26     --    --
 INST        SCHEDULED     WEATH     EQUIP      OBS    DAY   NOTUSED
I/RS/DN    START FINISH   D    B    D    B    D    B   USE   D    B
UC03/R     21:43  23:20   -   0.5   -    0    -   1.1   0    -    0
JH01/S     23:20  02:10   -   1.7   -    0    -   1.1   0    -    0
UC03/R     02:10  04:37   -   2.5   -    0    -    0    0    -    0
(note: times listed include instrument change time)
                              ACTIVITY LOG
(* means a trouble report has been issued or appended to)
Observing specialist: R. McMillan
Weather kept us closed for most of the night -- clouds and nearby rain
during the evening, and high dust counts in the morning hours.  During
the open periods, we were able to get some data between clouds,
including a creditable attempt to observe Io in eclipse.  While we
didn't actually manage to acquire the invisible moon, we believe we
will be able to observe the coming eclipses of Europa and Ganymede,
provided that the weather allows us to acquire the moons before they
enter Jupiter's shadow.  We have confirmed that the TCC does a superb
job of making the topocentric (and refraction) corrections necessary
to observe a planet at very high airmass, provided that good
geocentric ephemerides are available; our own default ephemeris is not
good enough.
                            OBSERVER COMMENTS
                                FOCUS LOG
                              JULY 25 1999
						 Wind
Time   Inst        Focus     Az  El   #Temp    Dir  MPH  filt  FWHM "
21:20  Echelle   -50(5948)  212  55 16.5/17.8  146   13   ND1  1.04
01:20  Echelle   -200        86  14 15.4/16.0  137   14   ND1  3.77
#First temp is air, second temp is telescope.
                                 WEATHER
                               JULY 25 1999
                               Wind
     Time   Temp F Dewp F  MPH  Direction    Dust      Sky      Precip.
     16:01    67    42      3   286  (WNW)    588    cloudy      rain
     17:01    64    47      6    25  (NNE)    715   mstly cldy   none
     18:01    63    45     11   126  (SE)     881   mstly cldy   none
     19:01    63    45      6   117  (ESE)    852   mstly cldy   none
     20:01    64    43      5   104  (ESE)    814   ptly cldy    none
     21:01    63    46      7   134  (SE)    1103   ptly cldy    none
     22:01    63    45      7   163  (SSE)   1178   ptly cldy    none
     23:01    62    46     10   178  (S)     1323   mstly cldy   none
     00:01    59    46     18   138  (SE)    3106   mstly cldy   none
     01:01    60    44      4   120  (ESE)   1989   ptly cldy    none
     02:01    60    40     13   129  (SE)    3496   ptly cldy    none
     03:01    60    39     13   141  (SE)    3473   ptly cldy    none
     04:01    58    38      8   166  (SSE)   3856   mstly clr    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.
- Russet McMillan