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 April 26, 2021 by Ricardo Valles Blanco, ESAC/ESA. Brief Summary -------------------------------------------------------- CK (Camera-Matrix Kernel) files contain time varying orientation for the ExoMars2016 TGO spacecraft, its structures, and science instruments. 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 acronym of the spacecraft (required): tgo: for the Trace Gas Orbiter (TGO) spacecraft; edm: 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; acs: for the Atmospheric Chemistry Suite ACS; 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 of the spin axis of EDM; cassis: C-Smithed CKs produced by the CaSSIS team; 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 version number -- 2 digits (required; e.g. 01). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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 this filter works well in most cases but fails in some situations in which there is a predominance of wrong time stamps. Created by the ESA SPICE Service (ESS). 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 this filter works well in most cases but fails in some situations in which there is a predominance of wrong time stamps. Created by the ESA SPICE Service (ESS). 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 this filter works well in most cases but fails in some situations in which there is a predominance of wrong time stamps. Created by the ESA SPICE Service (ESS). 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 this filter works well in most cases but fails in some situations in which there is a predominance of wrong time stamps. Created by the ESA SPICE Service (ESS). em16_tgo_sc_isr_cassis_20200101_20210101_s20230330_v01.bc SPICE CK file that contains TGO reconstructed attitude using as input single C-Smithed CKs produced by the CaSSIS team generated through ISIS processing techniques (control nets, jitter analysis, etc...). These CK kernels are intended to mimick CKs provided by individual mission (NAV teams). Finally all these C-Smithed CKs have been merged in a yearly ranged CKs with the utility DAFCAT and ADCSng. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). em16_tgo_sa_sam_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc SPICE CK file that contains measured orientation of the Solar Arrays Frames during aerobraking phase. Created by the ESA SPICE Service (ESS). em16_tgo_sa_ssm_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc SPICE CK file that contains measured orientation of the Solar Arrays Frames during science phase. Created by the ESA SPICE Service (ESS). em16_tgo_nomad_sop_default_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc SPICE CK file that contains default predicted position of the NOMAD flip mirror. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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_cassis_tel_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc SPICE CK file that contains planned position of the CaSSIS telescope rotation mechanism for the cruise phase. em16_tgo_acs_sop_default_YYYYMMDD_YYYYMMDD_sYYYYMMDD_vNN.bc SPICE CK file that contains default predicted position of the ACS TIRVIM scanner. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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. Created by the ESA SPICE Service (ESS). 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 (ESS). 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: 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 (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.