ily the same. The time unit
   associated with a given field, multiplied by the modulus for that field,
   gives the time unit for next field to the left.
<P>
 
   For each field but the first, values may exceed the modulus for the
   field. For example, the modulus of the fourth field of a Galileo SCLK
   string is 8, but the digit ``9'' is allowed in that field. So
<P>
 
<PRE>
   0:0:0:9
</PRE>
   is a valid Galileo SCLK string and represents the same time as
<P>
 
<PRE>
   0:0:1:1
</PRE>
   On input to C