PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2003-10-15 
   NOTE                 = "PC-Kernel Information"
END_OBJECT              = TEXT
                                                                     
END 


General information about SPICE PC-kernels
==========================================

   In the SPICE system, the PC-kernels contain planetary attitude and
   body shape information. The PCK kernel includes orientation and
   shape information pertaining to extended solar system bodies such as
   the Sun, the planets, the natural satellites of the planets, comets,
   and asteroids. The most recent PC kernel file can always be obtained
   from NAIF/JPL.
 
   The purpose of the PCK kernels and associated software is to provide
   SPICE users with a convenient mechanism for supplying planetary
   physical constants to application programs. SPICELIB's PCK software
   is able to read files conforming to the PCK format and return to a
   calling application program both the data contained in such files
   and a small number of commonly used numeric quantities derived from
   the kernel data. The SPICE system toolkit for a number of computer
   platforms or information regarding how it can be obtained is located
   in the SOFTWARE sub-directory of the main directory of this data
   set.
 
   Refer to the PCK.REQ document provided with the toolkit or available
   from the NAIF Node of PDS if SPICE toolkit is not included with this
   data set to get more information on how to access PC-kernel data.


DS1 PC-kernel contained on this volume
======================================

   This directory contains PCK files used by DS1 project. 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 Frames Kernel files are always ".tpc"):
   
           pck00007             The latest generic SPICE PCK file
                                available at the time when this archive
                                was created
 
           ds1_braille_v02      PCK file containing asteroid Braille size,
                                shape, and orientation;
 
           ds1_borrelly_v01     PCK file containing comet Borrelly size,
                                shape, and orientation;


Kernel File Details
===================

   The most detailed description of the data in a text PCK file is 
   provided in metadata included inside the description area of 
   the file. This information can be viewed using any text editor
   program.
   
   The most detailed description of the data in a binary PCK file is 
   provided in metadata included inside the comment area of the file. 
   This information can be viewed using utility programs COMMNT and 
   SPACIT included into the NAIF Toolkit.


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

   Regarding DS1 project specific information provided in this
   data set and for general information about SPICE system:
   
      Charles H. Acton, Jr, 
      (818)-354-3869, 
      Chuck.Acton@jpl.nasa.gov, 
      
   or 
   
      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