ts produced by different sets of software.
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<A NAME="SCLK kernels"></A>
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<H3> SCLK kernels
</H3><P><BR><BR>
   SCLK files conform to a flexible format called ``NAIF text kernel''
   format. The SPICE file identification word provided by itself on the
   first line of a text SCLK file is ``KPL/SCLK''. Both the NAIF text
   kernel format and SPICE file identification word are described in detail
   in the Kernel Required Reading document,