 
   Details concerning the kernel pool are covered in the KERNEL required
   reading document, <a href="../req/kernel.html">kernel.req</a>.
<P>
 
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<A NAME="Partitions, briefly"></A>
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<H3> Partitions, briefly
</H3><P><BR><BR>
   The lifetime of each mission is divided into intervals called
   ``partitions.'' Partitions are time intervals during which the
   spacecraft clock advances continuously. Every time that a discontinuity
   in a spacec