This is a partial list of planned groundbased observations of the
Galilean satellites in 1996.  Let me know (spencer@lowell.edu)
if you want to correct, update, or add to this list.

IO VOLCANO MONITORING:
Observers       Facility Instrument  UT Dates       Purpose
-----------------------------------------------------------------------
Spencer,       IRTF,    NSFCAM    2/06;2/14;2/16;  Eclipses and occultations 
Stansberry,    Mauna    1-5 mic   2/29;3/02;3/23;  by Jupiter, 1.7-5.0 microns
Dumas          Kea      camera    4/08;4/24;4/26;  Locations and variability
                                  6/02;6/27(?);    of individual hot spots.
                                  7/04;7/06(?)
                                  August onwards
                                  unscheduled

Goguen,        IRTF,    Bolo-     5/23-5/26;       IR lightcurves, 5-20
Matson,Veeder, Mauna    meter     6/25-6/30(?)     microns.  Longitudinal
Blaney,        Kea                August onwards   distribution and variability
Johnson                           unscheduled      of hot spots, heat flow.

Goguen et al.  Palomar  MIRLIN    4/21-4/25;       Disk-resolved 4.8-12.5 micron
               5-meter  IR camera 4 partial nights imaging of Io.
                                  Mid-August

Goguen et al.  Palomar  Spectro-  4 partial nights Disk-resolved 4.8-12.5 micron
               5-meter  cam 10    late June-       imaging of Io.
                        IR camera early July

Howell         WIRO,    Speckle   March 4-7        3-5 micron eclipses and
               Wyoming  system    Apr. onwards     occultations by Jupiter,
                                  unscheduled      5 micron lightcurves, bright
                                                   hot spot locations.

Howell,        WIRO,    TNT 10    1/23, Feb 29-    10-18 micron sunlit,
Creech-Eakman, Wyoming  micron    March 4.  Apr.   eclipse photometry.  Heat
Dahn, Klebe,            camera    onwards unsched. flow, variability

Spencer,       Lowell/  OSIRIS    3/2;3/9;4/3;     Eclipses and occultations
Stansberry     OSU 72"  1-2.5     4/17;4/26;5/26;  by Jupiter, 1.7-2.3 microns.
               Flag-    mic       5/28;6/4;6/11;   Locations and variability of
               staff    camera    6/20;6/27...     individual hot spots.

OTHER PROGRAMS THAT I KNOW ABOUT
Observers      Facility Instrument  UT Dates       Purpose
-----------------------------------------------------------------------------
Bell, Veverka, IRTF,    NSFCAM,   7/25-7/26        Images and spectra of
Brown,         Mauna    CoCo                       Amalthea, Thebe
Cruikshank     Kea      Coronograph                (see below)

Monet, Owen,   USNO,    2048      Frequent         Improve Galilean satellite 
et al.         Flag-    CCD                        ephemerides (see below)
               staff

------------------------------------

Bill Owen of JPL (wmo@wansor.jpl.nasa.gov) gives more details on the JPL/USNO
astrometric program:

   For the fifth year, the U.S. Naval Observatory Flagstaff Station,
   under contract to JPL, will observe the Galilean satellites for
   astrometry purposes.  These observations, taken at the 61-inch
   telescope with a Tektronix 2048 CCD (11-arcminute field), consist of
   repeated short exposures alternating with partial readout of the chip.
   This technique can store dozens of observations in the equivalent of
   11 image files.
   
   Since the Galileo orbiter has yet to take its first in situ optical
   navigation frame, groundbased astrometry is becoming increasingly
   important.  The observations at Flagstaff, when combined with Dan
   Pascu's photographic series in Washington, four centuries of eclipse
   timings, and other astrometry, provided a sufficiently up-to-date
   ephemeris to allow the events of last December to happen without opnav
   data.
   
   This observing program was described in poster paper 74.03,
   "Ground-based CCD Astrometry for the Galileo Mission," presented by
   Alice Monet at the just- concluded AAS meeting in San Antonio.  Alice
   is our point of contact at NOFS, but many of their staff astronomers
   have assisted with the observations.
   
   
   I've been supplementing the Flagstaff observations with similar ones,
   but of lower quality, taken at JPL's 24-inch telescope at Table
   Mountain Observatory.

   -- Bill Owen

--------------------------------------
And Jim Bell (jimbo@cuspif.tn.cornell.edu) gives more details on the 
small satellite IRTF observations:

   Jim Bell, Joe Veverka (Cornell), Bob Brown (JPL), and Dale Cruikshank
   (Ames) plan to use the IRTF NSFCAM and JPL's CoCo (Cooled Coronagraph)
   instruments to obtain H, K, and possibly L images and spectra of
   Jupiter's inner satellites Amalthea and Thebe.  The observations are
   scheduled for July 25 and 26 UT.  The goals are to constrain the
   surface composition and mineralogy of these objects and to search for
   evidence of hemispherical asymmetries.  The observations will also
   provide calibration/validation assistance should Galileo NIMS be able
   to observe these objects from orbit.  We are also interested in
   collaborating with other observers to obtain simultaneous UBVRIJ
   during the times of our near-IR observations.