INTEGRAL SPK files
===========================================================================

   This ``aareadme.txt'' file describes the contents of the kernels/spk
   directory of the INTEGRAL SPICE Kernel Dataset.

   It was last modified on February 9, 2022 by Alfredo Escalante, ESAC/ESA.


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

   This directory contains the SPICE SP-Kernel files for the INTEGRAL
   mission, including mission analysis, nominal and operational spacecraft
   trajectory SPKs, generic planetary and satellite ephemeris SPKs.


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

   There is no agreed naming Scheme for INTEGRAL spacecraft SPKs.


Current SPK Kernels Set
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   integral_sc_DESCR.bsp

      SPICE SPK file containing INTEGRAL spacecraft position data from
      orbit historic. Created by the ESA SPICE Service.


   de432s.bsp

      SPICE SPK file containing JPL planetary ephemerides version DE432,
      created by NAIF, JPL.


   estrack_vNN.bsp

      SPICE SPK file that defines the position for each of the ESA ESTRACK
      ground stations, as seen from the center of the Earth, in the
      topocentric frame defined in the corresponding ESTRACK FK.


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

   aareadme.txt         This file.


Particulars
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   Trajectory data is consistent with planetary ephemeris DE-432 and with
   the leapseconds kernel naif0010.tls


Kernel File Details
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     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.


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


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

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


End of aareadme file.