></p>
<H3> Ticks
</H3><P><BR><BR>
   The units of encoded SCLK are ``ticks since spacecraft clock start,''
   where a ``tick'' is defined to be the shortest time increment
   expressible by a particular spacecraft's clock.
<P>
 
   An analogy can be drawn with a standard wall clock, showing hours,
   minutes, and seconds. One tick for a wall clock would be one second. And
   a wall clock time of
<P>
 
<PRE>
   10:05:50
</PRE>
   would represent
<P>
 
<PRE>
   10(3600) + 5(60) + 50 = 36350
</PRE>
   ticks.
<