ExoMars2016 SCLK files
===========================================================================

   This ``aareadme.txt'' file describes the contents of the kernels/sclk
   directory of the ExoMars 2016 SPICE Kernel Dataset.

   It was last modified on April 05, 2021 by Ricardo Valles Blanco, ESAC/ESA.


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

   This directory contains the SPICE Spacecraft Clock-Kernel files for the
   ExoMars 2016 Trace Gas Orbiter (TGO) spacecraft on-board clock.


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

   The naming scheme for TGO SCLKs is:

        em16_tgo_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
--------------------------------------------------------

   em16_tgo_step_YYYYMMDD.tsc

      SPICE SCLK file containing time correlation data for the TGO on-board
      clock. Created by the ESA SPICE Service (ESS).


   em16_tgo_fict_YYYYMMDD.tsc

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


   em16_edm_fict_YYYYMMDD.tsc

      SPICE SCLK file assuming an absolutely constant clock rate for EDM. 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:

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

     or SPICE support at IKI:

           Alexander Abbakumov
           +7 (495) 333-40-13
           aabbakumov@romance.iki.rssi.ru

   or NAIF at JPL:

           Boris Semenov
           +1 (818) 354-8136
           Boris.Semenov@jpl.nasa.gov


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.