PDS_VERSION_ID          = PDS3                                                
RECORD_TYPE             = STREAM                                              
                                                                              
OBJECT                  = TEXT                                                
   INTERCHANGE_FORMAT   = ASCII                                               
   PUBLICATION_DATE     = 2008-02-28                                          
   NOTE                 = "SP-Kernel Information"                             
END_OBJECT              = TEXT                                                
                                                                              
END                                                                           
                                                                              
General information about SPICE SP-kernels                                    
==========================================                                    
                                                                              
   The purpose of the SP-kernel (SPK), which stands for S(pacecraft)          
   and P(lanet) Kernel, is to allow ephemerides for any collection of         
   solar system bodies, spacecraft or any other objects in 3D space to        
   be combined under a common file format, and accessed by a common set       
   of subroutines. SP Kernels provide the state of a target relative to       
   its center of motion, where ``state'' implies Cartesian position and       
   velocity at a requested epoch.                                             
                                                                              
   The SPK format is supported by a collection of subroutines that are        
   part of the SPICELIB library, the major component of the NAIF              
   Toolkit. These subroutines can be integrated into user application         
   programs. Information about obtaining the SPICE Toolkit is located         
   in the "software" subdirectory of the main directory of this               
   dataset.                                                                   
                                                                              
   To use SP-kernels, a Leapseconds Kernel (LSK) is required. Also, to        
   use SP-Kernels containing states defined relative to non-inertial or       
   project-defined frames, a Frames Kernel (FK) and/or Planetary              
   Constants Kernel (PcK) are required.                                       
                                                                              
   Refer to the SPK Required Reading (spk.req) document provided with         
   the Toolkit or available from the NAIF Node of the PDS, to get more        
   information on how to access SP-kernel data.                               
                                                                              
                                                                              
New Horizons SP-kernels Provided in This Directory                            
=================================================                             
                                                                              
   This directory contains the SPICE SP-Kernel files for the New Horizons     
   spacecraft, New Horizons mission targets, (Jupiter and Pluto), and solar   
   system bodies. All files are in IEEE big endian binary format and          
   suitable for use on UNIX workstations and MACs. The following files are    
   present in this directory:                                                 
                                                                              
      de413.bsp                                                               
        - JPL planetary ephemeris file. Version 413                           
                                                                              
      jup260.bsp                                                              
        - Ephemeris data for Jupiter and its satellites                       
                                                                              
      nh_nep_ura_000.bsp                                                      
        - Ephemeris data for Neptune and Uranus                               
                                                                              
      nh_p20070319_20100101_od051.bsp                                         
        - Predicted trajectory data for the New Horizons spacecraft covering  
          2007-03-19 to 2010-01-01, used by SOC pipeline for populating       
          geometry keywords in the data. In general,                          
          nh_recon_j2sep07_prelimv1.bsp should be used instead. It is included
          here for historical purposes.                                       
                                                                              
      nh_recon_e2j_v1.bsp                                                     
        - Reconstructed trajectory data for the New Horizons spacecraft       
          covering launch (2006-01-19) through 2007-03-19.                    
                                                                              
      nh_recon_j2sep07_prelimv1.bsp                                           
        - Preliminary reconstructed trajectory data from 2007-03-19 to        
          2007-09-07                                                          
                                                                              
      plu013.bsp                                                              
        - Ephemeris data for Pluto and Charon                                 
                                                                              
      sb_2002jf56_2.bsp                                                       
        - Ephemeris data for asteroid 132524 APL (2002 JF 56)                 
                                                                              
                                                                              
Kernel File Details                                                           
===================                                                           
                                                                              
   The most detailed description of the data in each SPK file is              
   provided in metadata included inside the comment area of the file.         
   This information can be viewed using the utility programs COMMNT and       
   SPACIT included in the NAIF Toolkit.