eck on text.
<P>
 
<BR><BR>
<A NAME="April 12, 1999"></A>
<p align="right"><a href="#top"><small>Top</small></a></p>
<H3> April 12, 1999
</H3><P><BR><BR>
   The document differs from the previous version of April 20, 1992 in that
   it documents the new capability of the SCLK software to convert between
   ET and continuous ticks. Examples involving Mars Observer have been
   updated to refer to Mars Global Surveyor. The quotation style has been
   changed from British to American. The program example showi