PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2006-06-30
   NOTE                 = "This file describes the files in the 
                           ckxtra directory of this volume."
END_OBJECT              = TEXT
END


Extra data related to the Cassini C-Kernels
===========================================

   This directory contains value added elements related to C-Kernels.
   These elements fall into 2 categories: Imaging Science Subsystem
   (ISS) image navigation data and comparisons between Attitude and
   Articulation Control Subsystem (AACS) reconstructed and predicted
   orientation data. The former elements are found in "ckiss"
   subdirectory. The latter are found in the "cknav" subdirectory.


Extra data related to Cassini C-Kernels: ISS image navigation data
==================================================================

   The subdirectory "ckiss" contains data related to c-smithed or image
   navigated C-Kernel (CK) pointing information. It includes logs of
   angular differences between image navigated and AACS reconstructed
   CKs and graphic images that result from the image navigation
   process. For more information, see the file "ckiss/issinfo.txt".


Predicted/reconstructed CK comparison data
==========================================

   The subdirectory "cknav" contains data showing the results of
   comparisons between predicted and reconstructed CK's produced by
   AACS. For more information, see the file "cknav/navinfo.txt".

  
Contact Information
===================

   Regarding Cassini project specific information provided in this data
   set and for general information about SPICE system, contact:

      Boris Semenov 
      (818)-354-8136 
      Boris.Semenov@jpl.nasa.gov
      
   address:
   
      Navigation and Ancillary Information Facility (NAIF)
      Jet Propulsion Laboratory
      MS 301-125L
      4800 Oak Grove Drive
      Pasadena CA 91109 USA