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			 **   THE GEM MESSENGER   **
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						     Volume 5, Number 4
						     February 24, 1995

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Conjunctions Between IMP8 - GEOTAIL in the Magnetotail for 1995
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From: Vassilis Angelopoulos (vassilis at jhuapl.edu)

Dear fellow scientists,

With WIND launched and healthy, the usefulness of the IMP8 satellite
as an additional reference point to monitor the global magnetospheric
configuration is increasing. In particular at the nightside, IMP8 and
GEOTAIL offer some nice opportunities to conduct two point
measurements in the plasma sheet, lobe and magnetopause. While
GEOTAIL has a full complement of diagnostics, IMP8 has magnetic field
and energetic particle detectors that are still operating and can
provide useful information in the nightside magnetosphere.

With the help of NSSDC who provided projected orbits and the
Satellite Situation Center, who provided conjunction software, we
have constructed plots of the upcoming conjunctions between IMP8 -
GEOTAIL in the magnetotail for 1995. We would like to alert
magnetospheric, ionospheric and ground experimentalists about these
upcoming conjunctions.

Plots of the 1995 tail conjunctions between IMP8 and GEOTAIL exist in
postscript format at our anonymous ftp server (ftp aplsp-ftp.jhuapl.edu)
under directory pub/geotail/GEOTAIL_IMP8_TAIL95/plots and in gif format 
at the JHU/APL WWW home page: http://sd-www.jhuapl.edu under mission 
GEOTAIL.  The direct link to the gif images is: 
http://sd-www.jhuapl.edu/Geotail/GEOTAIL_IMP8_TAIL95/plots).

You can access the powerful software package that was developed by the
Satellite Situation Center under the Space Physics option of NSSDC's
WWW home page: http://nssdc.gsfc.nasa.gov. You can contact Sardi
Parthasarathy at sardi at nssdca.gsfc.nasa.gov for more details and a 
copy of the software manual.

Many thanks to NSSDC and the Satellite Situation Center for making these
conjunctions available. We are looking forward to the community's
response in terms of suggestions to the GEM working group leaders
and PIs of ground facilities to take advantage of the upcoming
opportunities.

Vassilis Angelopoulos, JHU/APL, (301) 953-6000 X4630 (vassilis at jhuapl.edu)

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