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<TITLE>International Program Office - Equator S Project</TITLE>
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<P>&nbsp;</P>
<P><FONT SIZE="-1" FACE="Arial">The EQ-S is an international
cooperative mission between NASA and The German Space Agency,DARA.
The spacecraft is provided by Germany and will carry instruments
to provide high-resolution plasma, magnetic, and electric field
measurements in several regions not covered by existing International
Solar Terrestrial Physics (ISTP) missions. These regions are
namely the low-latitude dayside magnetopause and its boundary
layer, the equatorial ring current, and the near-earth equatorial
plasma sheet. EQ-S will be launched on an Ariane IV launch vehicle
in late 1997. NASA will provide the Apogee kick motor used to
circularize the orbit. Mission analysis and operation will be
provided by the German Space Operations Center (GSOC) of the
DLR. NASA is providing the 3D Plasma Instrument of the University
of Washington which will measure electrons from 1 KeV to 30 KeV.
NASA is also providing the significant support to two other instruments
to be flown on the spacecraft. NASA is furnishing the Time-of-Flight
(TOF) section for the Ion Composition Instrument provided by
Max Plank Institut Fur Extraterrestrische Physch (MPE). The instrument
will cover an energy range similar to that of the 3D Plasma Instrument.
NASA is also supplying the Gun Detector Units (GDU) for the Electron
Drift Instrument (EDI),being provided by MPE. The EDI will measure
the drift of a weak beam of test electrons which is related to
the ambient electric field and the gradient in the magnetic field.</FONT></P>
<P><B><FONT SIZE="-1" FACE="Arial">Salient Features:</FONT></B></P>
<P><FONT SIZE="-1" FACE="Arial"><BR>
<B>Project Start:</B> Fall 1994 <BR>
<B>Spacecraft Weight: </B>250 Kg<BR>
<B>Planned Lifetime: </B>1 year <BR>
<B>Orbit:</B> 500 Km X 10 RE, 70 inclination<BR>
<B>Launch:</B> Ariane IV from Guiana, South America, Successfully Launched
November 1997</FONT></P>
<P><FONT SIZE="-1" FACE="Arial"><BR>
<B>Instrument Complement:</B></FONT></P>
<P><FONT SIZE="-1" FACE="Arial">Magnetometer (GERMANY)<BR>
Electron Drift Instrument (GERMANY/US) <BR>
3D-Plasma Experiment (U of W) <BR>
Ion Composition Instrument (UNH) <BR>
Energtic Particle Instrument (ESA)<BR>
Potential Control Device (AUSTRIA)</FONT></TD>
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