R>
   For every type 1 spacecraft clock, encoded SCLK values are converted to
   ephemeris time (TDB) as follows: first, encoded SCLK values are mapped
   to equivalent time values in a standard time system such as TDB or TDT.
   If the standard time system is not TDB, values from this system are
   mapped to TDB.
<P>
 
   The standard time system used for the conversion is referred to here and
   in the CSPICE SCLK functions as the ``parallel'' time system. Normally,
   the CSPICE Toolkit will use only one