><BR>
<A NAME="April 1, 2009"></A>
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<H3> April 1, 2009
</H3><P><BR><BR>
   Added a note about the SPICE file identification word for SCLK files.
<P>
 
<BR><BR>
<A NAME="March 02, 2008"></A>
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<H3> March 02, 2008
</H3><P><BR><BR>
   Updated discussion of type 1 conversion algorithm to clarify role of
   parallel time system. Updated discussion of SCLK string formats to
   indicate support for 4-