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<TITLE>International Program Office - XMM Project</TITLE>
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<P><FONT COLOR="#000099" SIZE="-1" FACE="Arial">The XMM is an
international cooperative project between NASA and the European
Space Agency (ESA). The XMM is<BR>
a High Throughput X-Ray Spectroscopy Mission which is the second
cornerstone of the ESA longrange scientific plan to be launched
on an Ariane V rocket in 1999. NASA is providing significant
support in two of the three instruments to be flown on the spacecraft.</FONT></P>
<P><FONT COLOR="#000099" SIZE="-1" FACE="Arial">NASA is furnishing
the reflection gratings for the Reflection Grating Spectrometer
provided by the Scientific Research Organization of the Netherlands
(SRON) - Laboratory for Space Research. The instrument will provide
unparalleled sensitivity for high resolution spectroscopic observations
of cosmic sources in the soft X-ray band.</FONT></P>
<P><FONT COLOR="#000099" SIZE="-1" FACE="Arial">NASA is also
supplying the data processing unit for the Optical Monitor (OM)
being provided by the Mullard Space Science Laboratory of England.
The OM will provide optical and UV data simultaneously with the
x-raymeasurements.</FONT></P>
<P><B><FONT COLOR="#000099" SIZE="-1" FACE="Arial">Salient Features:</FONT></B></P>
<P><B><FONT COLOR="#000099" SIZE="-1" FACE="Arial">Project Start:</FONT></B><FONT
COLOR="#000099" SIZE="-1" FACE="Arial"> U.S. Co-Investigators
selected June 1989<BR>
<B>Spacecraft Weight:</B> 2,374 kg<BR>
<B>Planned Lifetime: </B>2 years with the possibility of more
than 10 years<BR>
<B>Orbit:</B> 70,565 km by 1,000 km, 60 Degrees inclination<BR>
<B>Launch:</B> ARIANE V from Guiana, South America, December 1999</FONT></P>
<P><B><FONT COLOR="#000099" SIZE="-1" FACE="Arial">Instrument
Complement:</FONT></B></P>
<P><FONT COLOR="#000099" SIZE="-1" FACE="Arial">Three Mirror
Modules <BR>
Two X-ray Reflection Gratings<BR>
Three European Photon Imaging Cameras<BR>
Optical Monitor<BR>
CCD X-ray Detectors</FONT><TABLE WIDTH="686" BORDER="0" CELLSPACING="2"
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