MRO SCLK files.
===========================================================================
 
     This ``aareadme.txt'' file describes contents of the kernels/sclk
     directory of the MRO SPICE data server. It was last modified on
     February 16, 2005. Contact Chuck Acton (818-354-3869,
     Chuck.Acton@jpl.nasa.gov) or Boris Semenov (818-354-8136,
     Boris.Semenov@jpl.nasa.gov) if you have any questions regarding this
     data.
 
 
Brief summary
--------------------------------------------------------
 
     This directory contains the SPICE SCL-Kernel files for the MRO
     spacecraft on-board clock. All files are in IEEE text format and must
     be copied using ftp ASCII transfer to any non-UNIX workstation. The
     following files are present in this directory. (Only file names are
     shown; the file name extensions of the text SCLK files are always
     ".tsc"):
 
           MRO_SCLKSCET VVVVV         ``Standard'' MRO Spacecraft clock
                                      coefficients Kernel (SCLK) file,
                                      providing conversion for SCLKs with a
                                      count of 1/256 of a second as the
                                      fractional part. These SCLK kernels
                                      use ID -74.
 
           MRO_SCLKSCET VVVVV 65536   ``High Precision'' MRO Spacecraft
                                      clock coefficients Kernel (SCLK)
                                      file, providing conversion for SCLKs
                                      with a count of 1/65536 of a second
                                      as the fractional part. These SCLK
                                      kernels use special ID -74999.
 
     Both types of file are generated by converting corresponding SCLKvSCET
     files produced by Spacecraft Team/LMA to SPICE SCLK format using
     MAKCLK SPICE Utility program. These files are created/delivered every
     time when LMA deliver new SCLKvSCET file (usually once every two-four
     weeks.)
 
     If multiple versions of an SCLK file are provided, always use the
     latest version (unless earlier version is needed for some special
     reasons.)
 
 
SCLK File Naming Schema.
--------------------------------------------------------
 
     The MRO SCLK files naming schema is as follows:
 
           MRO_SCLKSCET.vvvvv[.65536].tsc
 
     where
 
           vvvvv                      is the file version (example:
                                      ``00005'' for Version 5);
 
           65536                      specifies that the file is a ``high
                                      precision'' SCLK providing conversion
                                      for SCLK tags that have fractional
                                      part expressed as a count of 1/65536
                                      of a second.