PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2006-03-01
   NOTE                 = "LS-Kernel Information"
END_OBJECT              = TEXT
                                                                     
END 


General information about SPICE LS-kernels
==========================================

   In the SPICE system, the Leapsecond (LSK) -Kernel contains a
   tabulation of leapseconds and the values of other constants required
   to perform a transformation between Universal Time Coordinated (UTC)
   and Ephemeris time (ET). Leapseconds occur only at the New Year or
   the end of June. The user should check with NAIF/JPL regularly to
   keep up to date about leapseconds.

   The information in an LSK file can be manipulated 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.

   Refer to the Time Required Reading (time.req) document provided with
   the toolkit or available from the NAIF Node of the PDS, to get more
   information about time conversions supported within the SPICE
   system.


Deep Impact LS-kernel contained in this directory 
=================================================
 
   The generic LSK file naming schema is as follows:
 
      naifVVVV.tls
 
   where
 
      VVVV   is the version of the file (example: "0008" is version 8);

   The following LSK file is provided on this volume:
   
      naif0008.tls

   This file is the latest generic SPICE LSK file distributed by
   NAIF/JPL at the time when this data set was created.


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

   The most detailed description of the data in an LSK file is provided
   in metadata included inside the descriptive text areas within the
   file. This information can be viewed using any text editor.


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

   Regarding Deep Impact project specific information provided in this
   data set and for general information about SPICE system:
   
      Boris Semenov
      (818)-354-8136
      Boris.Semenov@jpl.nasa.gov
 
   or

      Chuck Acton
      (818)-354-3869 
      Chuck.Acton@jpl.nasa.gov

   address:
   
      Navigation and Ancillary Information Facility (NAIF)
      Jet Propulsion Laboratory
      MS 301-125L
      4800 Oak Grove Drive
      Pasadena CA 91109 USA 

