PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2009-02-23
   NOTE                 = "I-Kernel Information"
END_OBJECT              = TEXT

END


General information about SPICE I-kernels
=========================================

   In the SPICE system, I-kernels describe how an instrument is mounted
   to the instrument platform. I-kernels also contain instrument
   field-of-view specifications, principal axes specifications and
   possibly other instrument-specific information useful in the SPICE
   context.

   The I-Kernel mounting alignment, along with knowledge of the
   spacecraft position (SP kernel) and instrument pointing (C kernel),
   allows the user to use 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 Kernel Required Reading (kernel.req) document provided
   with the toolkit or available from the NAIF Node of the PDS, to get
   more information on how to access I-Kernel data.


EPOXI I-kernels Provided in This Data Set
=========================================

   This data set contains the following Deep Impact Flyby (DIF) IK files
   (only the leading portion of the file name is shown; the extension
   of all file names is ".ti"):

      dif_hri_v10   IK file for the DIF High Resolution Imager (HRI)
                    instrument

      dif_mri_v10   IK file for the DIF Medium Resolution Imager (MRI)
                    instrument

   All files are in IEEE text format and must be copied using ftp ASCII
   transfer to any non-UNIX workstation.


EPOXI IK File Naming Scheme
===========================

   The EPOXI IKs provided in this data set are named according to the
   following scheme:

      dif_inst_vXX.ti

   where:

      inst      is the name of the instrument: "hri" for High
                Resolution Imager, "mri" for Medium Resolution Imager.

      vXX       is the file version number;

   If multiple versions of an IK file are provided for an instrument,
   always use the latest version (unless an earlier version is needed
   for some special reasons.)


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

   The most detailed description of the data in an IK 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 EPOXI 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