PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

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

General information about SPICE E-kernels
=========================================

   The purpose of the Events (E) -kernel is to store different kinds of
   the spacecraft and science instrument events related information
   such as spacecraft and instrument commands, status parameters,
   records of spacecraft activities, ground events, and so on, and to
   systematize and provide access to this data in relational data base
   -like fashion.

   The means of an access to the EK data are provided via collection of
   subroutines that are part of the SPICELIB library, the major
   component of the NAIF Toolkit, or using SPICE system utility program
   INSPEKT to browse E-kernel contents. The subroutines can be
   integrated into user application programs while the INSPEKT program
   can be used to view E-kernel information interactively. 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.
   
   To use E-kernels with INSPEKT program, a Leapseconds (LSK) is
   required.
   
   Refer to the EK.REQ and INSPEKT.UG documents 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 E-kernel data.


DS1 EKs provided on this volume
===============================

   This volume contains the SPICE Event Kernel (EK) files for the DS1
   spacecraft. All files are in IEEE binary format and suitable for ftp
   binary transfer to use on UNIX workstations and MACs. The following
   DS1 Spacecraft Sequence EK files files are present in this volume
   (only file names are shown; the file name extensions of the binary
   Sequence EK files are always ".bes"):

         ds1_nom_seq_braille    DS1 predict sequence EK file for
                                Braille encounter
 
         ds1_nom_seq_borrelly   DS1 predict sequence EK file for
                                Borrelly encounter

   Each EK contains the final version of the nominal predict command
   sequence for that encounter along with the command dictionary
   information, current at the time of the encounter.


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

   The most detailed description of the data in a binary EK 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