ExoMars2016 CK files
===========================================================================

     This ``aareadme.txt'' file describes the contents of the kernels/ck
     directory of the ExoMars2016 SPICE Kernel Dataset.

     It was last modified on July 15, 2019 by Marc Costa Sitja, ESAC/ESA.


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

     CK (Camera-Matrix Kernel) files contain time varying orientation for
     the ExoMars2016 TGO spacecraft, its structures, and science instruments.

    """THIS IS JUST SOME TEXT ADDED TO FORCE DIFFERENCES IN AREADME FILE
    COMPARED WITH PREVIOUS BUNDLE AREADME"""

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

   ExoMars2016 spacecraft CK:

      The naming scheme for the ExoMars2016 spacecraft CKs is:

           em16_SC_INST_TYPE[_ID][_DESC]_YYYYMMDD_YYYYMMDD_SCLK_vNN.bc

      where

           SC       accronym of the spacecraft (required):

                       tgo: for the Trace Gas Orbiter (TGO) spacecraft;
                       edm: for the for the Schiaparelli (EDM) lander;

           INST     instrument/structure/sensor identifier (required):

                       sc: for the TGO/EDM spacecraft frame;
                       cassis: for the CaSSIS Telescope frame;
                       nomad: for the NOMAD LNO Scanning mirror frame;

           TYPE      Data type, where a reference to the originator of the
                     data, the type of data and the and the reference period
                     is provided. This is a three letter acronym. The first
                     letter defines the file originator:

                          s: Science Operations Center;
                          m: Mission Analysis;
                          f: Flight Dynamics;
                          i: Instrument Team;

                     the second letter defines the reference period of the
                     data:

                          c: Cruise phase reference;
                          p: Pre-aerobraking phase reference;
                          a: Aerobraking phase reference;
                          l: Science phase Long term reference;
                          m: Science phase Medium term reference;
                          s: Science phase Short term reference;
                          o: Undefined reference;

                     the third letter indicates the type of data

                          p: Predicted data;
                          m: Measured data;
                          r: Reconstructed data;
                          t: Test data;

           ID        mapping to the original file product IDs as defined per
                     an ICD document (optional);

           DESC      description of the original reference file of any
                     particular of the original file (optional) e.g:

                          npo: Nadir Power-optimized s/c attitude;
                          noa: Nadir Orbit-aligned s/c attitude;
                          axis: Orientation of the spin axis of EDM;
                          spin: Angular velocity od the spin axis of EDM;

           YYYYMMDD  coverage start and stop times in TDB (required);

           SCLK      reference to SCLK used to created the CK (required):

                         sYYYYMMDD: SCLK version YYMMDD for type ``step''
                         tYYYYMMDD: SCLK version YYMMDD for type ``stretch''
                         fYYYYMMDD: SCLK version YYMMDD for type ``fictional''

           NN        CK version number -- 2 digits (required).


      See [5] for further details on the SCLK types available to ExoMars2016.

   If multiple versions of a C-Kernel file are provided, always use the latest
   version (unless earlier version is needed for some special reasons.)


Current CK Kernels Set
--------------------------------------------------------

    em16_tgo_sc_slt_npo_NNN_NN_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO long term predicted attitude. The file
       is generated by the ESA SPICE Service using a default nadir
       power-optimized attitude profile.


    em16_tgo_sc_smp_NNN_NN_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO predicted attitude. This is an
       intermediate planning product generated by the SGS.


    em16_tgo_sc_fmp_NNN_NN_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO predicted attitude, generated at medium
       term planning based on the attitude requests provided by the SGS. The
       source data is originated by Flight Dynamics.


    em16_tgo_sc_fpp_NNN_NN_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO predicted attitude for the
       pre-aerobraking phase and as commanded to the S/C in the operations
       loop. The source data is originated by Flight Dynamics.


    em16_tgo_sc_fsp_NNN_NN_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO predicted attitude, for short term
       planning and as commanded to the S/C in the operations loop. The
       source data is originated by Flight Dynamics.


    em16_tgo_sc_ssm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO measured attitude as provided by the
       quaternions on the housekeeping telemetry during the science phase.
       A filter has been applied to remove spurious quaternions due
       to erroneous time stamps. Note that his filter works well in most cases
       but fails in some situations in which there is a predominance of
       wrong time stamps.


    em16_tgo_sc_sam_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO measured attitude as provided by the
       quaternions on the housekeeping telemetry during the aerobraking
       phase. A filter has been applied to remove spurious quaternions due
       to erroneous time stamps. Note that his filter works well in most cases
       but fails in some situations in which there is a predominance of
       wrong time stamps.


    em16_tgo_sc_spm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO measured attitude as provided by the
       quaterinons on the housekeeping telemetry during the pre-aerobraking
       phase. A filter has been applied to remove spurious quaternions due
       to erroneous time stamps. Note that his filter works well in most cases
       but fails in some situations in which there is a predominance of
       wrong time stamps.


    em16_tgo_sc_scm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains TGO measured attitude as provided by the
       quaternions on the housekeeping telemetry during the cruise phase.
       A filter has been applied to remove spurious quaternions due
       to erroneous time stamps. Note that his filter works well in most cases
       but fails in some situations in which there is a predominance of
       wrong time stamps.


    em16_tgo_hga_sop_zero_20160314_20300101_s20190425_v01.bc

       SPICE CK file that contains canonical orientation of the High Gain
       Antenna Frame (zero azimuth and elevation angles).


    em16_tgo_hga_scm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the High Gain
       Antenna Frame during cruise phase.


    em16_tgo_hga_spm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the High Gain
       Antenna Frame during pre-aerobraking phase.


    em16_tgo_hga_sam_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the High Gain
       Antenna Frame during aerobraking phase.


    em16_tgo_hga_ssm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the High Gain
       Antenna Frame during science phase.


    em16_tgo_sa_sop_zero_20180314_203001001_s20190518_v01.bc

       SPICE CK file that contains canonical orientation of the Solar Arrays
       Frames (zero rotation).


    em16_tgo_sa_scm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the Solar Arrays
       Frames during cruise phase.


    em16_tgo_sa_spm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the Solar Arrays
       Frames during pre-aerobraking phase.


    em16_tgo_sa_sam_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the Solar Arrays
       Frames during aerobraking phase.


    em16_tgo_sa_ssm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured orientation of the Solar Arrays
       Frames during science phase.


    em16_tgo_nomad_sop_default_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains default predicted position of the NOMAD
       flip mirror.


    em16_tgo_nomad_scp_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains predicted position of the NOMAD flip
       mirror for the cruise phase.


    em16_tgo_nomad_scm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the NOMAD flip
       mirror for the cruise phase.


    em16_tgo_nomad_spm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the NOMAD flip
       mirror for the pre-aerobraking phase.


    em16_tgo_nomad_sam_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the NOMAD flip
       mirror for the aerobraking phase.


    em16_tgo_nomad_ssm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the NOMAD flip
       mirror for the science phase.


    em16_tgo_cassis_scp_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains predicted position of the CaSSIS telescope
       rotation mechanism for the cruise phase.


    em16_tgo_cassis_ilp_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains predicted position of the CaSSIS telescope
       rotation mechanism as provided by the CaSSIS instrument team.


    em16_tgo_cassis_ssm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the CaSSIS telescope
       rotation mechanism for the science phase.


    em16_tgo_acs_sop_default_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains default predicted position of the
       ACS TIRVIM scanner.


    em16_tgo_acs_ssm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the ACS TIRVIM
       scanner for the science phase.


    em16_tgo_acs_sam_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the ACS TIRVIM
       scanner for the aerobraking phase.


    em16_tgo_acs_spm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the ACS TIRVIM
       scanner for the pre-aerobraking phase.


    em16_tgo_acs_scm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains measured position of the ACS TIRVIM
       scanner for the cruise phase.


    em16_edm_sop_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc

       SPICE CK file that contains predicted attitude of the EDM lander
       generated by the ESA SPICE Service.


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

     aareadme.txt         This file.


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

     Nothing to report.


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

     The most detailed description of the data in a binary CK 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:

           Marc Costa Sitja
           (+34) 91-8131-457
           esa_spice@sciops.esa.int, marc.costa@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
             (818) 354-8136
             Boris.Semenov@jpl.nasa.gov


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

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

     2. ``C-Kernel Required Reading'', NAIF Document

     3. ``SCLK Required Reading'', NAIF Document

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

     5. ``ExoMars2016 SCLK file naming conventions,'' aareadme.txt file in
        kernels/sclk directory.


End of aareadme file.