JUICE SPK files
==============================================================================

   This ``aareadme.txt'' file describes the contents of the kernels/spk
   directory of the JUICE SPICE data server.

   It was last modified on February 9, 2024 by Rafael Andres Blasco, ESAC/ESA.


Contact Information
-----------------------------------------------------------------------------

   If you have any questions regarding this file contact the
   ESA SPICE Service (ESS) at ESAC:

           Alfredo Escalante Lopez
           (+34) 91-8131-429
           spice@sciops.esa.int

   or the JUICE Science Operations Center at ESAC:

           Marc Costa Sitja
           (+34) 646-746-711
           Marc.Costa@ext.esa.int


References and required readings
-----------------------------------------------------------------------------

   1. ``SPK Required Reading'', NAIF Document

   2. ``Juice Flight Dynamics ICD (PLID Annex A)'',
      JUI-ESOC-MOC-ICD-500, Issue 1, Revision 5,
      September 30, 2022.

   3. ``JUICE SPICE Interface Control Document'',
      SPICE-JUICE-ICD-002, Issue 2, Revision 2,
      October 24, 2022.


Brief Summary
-----------------------------------------------------------------------------

   This directory contains the SPICE SP-Kernel files for the JUICE
   mission, including mission analysis, nominal and operational spacecraft
   trajectory SPKs, generic planetary and satellite ephemerides SPKs, and
   JUICE structure and sensors' locations SPKs.


File naming conventions
-----------------------------------------------------------------------------

   Naming Scheme for JUICE spacecraft SPKs:

      The naming scheme for the JUICE spacecraft SPKs is:
     
            juice_TYPE[_DESC][_ID][_YYMMDD_YYMMDD]_vNN.bsp

      where

            TYPE     Data type, where a reference to the originator of the
                     data, the type of data and the and the reference period
                     is provided. The different types are:

                        orbc      S/C reconstructed and predicted cruise orbit
                                  from Flight Dynamics.

                        orbm      S/C reconstructed and predicted cruise orbit
                                  to which ATTM CKs are consistent to, from
                                  Flight Dynamics.

                        crema     Full mission test reference trajectory based
                                  on a crema document issue from Mission
                                  Analysis.

                        crema_plan
                                  Full mission test reference trajectory based
                                  on a crema document issue from Mission
                                  Analysis trim for start date matching with
                                  orbc Flight Dynamics trajectory.

                        mat_crema Full mission test reference trajectory based
                                  on a crema document issue from Mission
                                  Analysis (old reference);

            DESC     description of the original reference file (optional);

            ID       Mapping to the original file product IDs as defined
                     per an ICD document ([2] and [3]) (optional);

            YYMMDD   coverage start and stop times in TDB (optional);

            NN       version number, starting from 01 (required; e.g. 01);


   Naming Scheme for Generic Planetary Ephemeris SPKs

      The naming scheme for generic planetary SPKs is:

            deNNN.bsp

     where

            NNN      DE version (required; e.g. 421);


   Naming Scheme for Generic Satellite Ephemeris SPKs

      The naming scheme for generic satellite SPKs is:

            jupNNN[_EXTRA].bsp

     where

            NNN      satellite ephemeris number (required; e.g. 230);

            EXTRA    additional information token (optional; e.g. _minor);
 

   Naming Scheme for JUICE Structure Locations SPKs
 
      The naming scheme for JUICE structure locations SPKs is:
 
            juice_struct_vNN.bsp

      where

            NN       version number (required);

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

   Naming Scheme for JUICE Structure Internal Locations SPKs
 
      The naming scheme for JUICE structure internal locations SPKs is:
 
            juice_struct_internal_vNN.bsp

      where

            NN       version number (required);

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


Other directory contents
-----------------------------------------------------------------------------

   aareadme.txt         This file.


Particulars
-----------------------------------------------------------------------------

   Nothing to report.


Kernel File Details
-----------------------------------------------------------------------------

   The most detailed description of the data in a binary 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.


End of aareadme file.