INTEGRAL SCLK files
===========================================================================

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

   It was last modified on March 26, 2020 by Marc Costa Sitja, ESAC/ESA.


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

   This directory contains the SPICE Spacecraft Clock-Kernel files for the
   INTEGRAL spacecraft on-board clock.


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

   The naming scheme for INTEGRAL SCLKs is:

        integral_TYPE_YYYYMMDD.tsc

   where

        TYPE     SCLK data type contained within the file:

                 fict:   ``fictional'' data;

                 stre:   SCLK created using a 'stretch' strategy, i.e. TCPs
                         are considered only the time they start to be
                         applicable, and then the correlation is made by
                         linking these points, i.e. not taking into
                         consideration the gradient and offsets provided
                         within the TCPs;

                 step:   SLKC created using a 'step' strategy, i.e.
                         additional TCPs are created between real ones in
                         order to match the time correlation provided by a
                         TCP packet N at 60 seconds before TCP packet N+1,
                         so that continuity is forced.

        YYYYMMDD start time of applicability, i.e. either release date for
                 fictional SCLKs or date of the last TCP used to generate
                 the SCLK in stretch/step mode.


Current SCLK Kernels Set
--------------------------------------------------------


   integral_fict_YYYYMMDD.tsc

      SPICE SCLK file assuming an absolutely constant clock rate for INTEGRAL.
      This file is used for working with planning data. Created by the
      ESA SPICE Service (ESS).


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

   aareadme.txt         This file.


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

   Nothing to report.


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

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


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

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

           Marc Costa Sitja
           (+34) 91-8131-457
           esa_spice@sciops.esa.int, marc.costa@esa.int


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

   1.   ``SCLK required Reading'', NAIF Document

   2.   ``TIME Required Reading'', NAIF Document

   3.   ``KERNEL Pool Required Reading'', NAIF Document


End of aareadme file.