INSIGHT Reconstructed EDL Orientation CK File, INSIGHT EDL Team Solution ============================================================================ Created in March 2019 by Mark Johnson, INSIGHT EDL Team/LMCO; coverage shortened and comments added on May 2, 2019 by Boris Semenov, NAIF/JPL. Orientation Data in the File -------------------------------------------------------- This file contains reconstructed orientation of the INSIGHT cruise frame, 'INSIGHT_LANDER_CRUISE' (NAIF Frame ID -189000), relative to the INSIGHT Mars Mean Equator (MME) of J2000 inertial frame, 'INSIGHT_MME_2000' (NAIF Frame ID -189910), during EDL. Status -------------------------------------------------------- This file was prepared for archiving in the Planetary Data System (PDS). Pedigree -------------------------------------------------------- This file represents the attitude and attitude rates of the INSIGHT spacecraft during its descent to Mars on Nov 26 2018. The data in the original CK file named ``insight_rt_high_rate_bkwd_att_and_rate.bc'' spanned the period from approximately approximately 20 min before atmospheric entry interface to shortly after touchdown. In preparation for the archive the coverage of the file was shortened to start 7 minutes before the EDL interface time, when telemetry data rate became to 1 Hz, and to end 20 seconds after touchdown. The data presented in this CK is a result of combining telemetered attitude data (from ~E-7 min to just prior to Entry), generally at 1 second intervals, with calculated attitude quaternions generated by processing the 200 Hz data from the IMU. Data represents the transformation from the Mars-centered, Mars Mean Equator, IAU node of J2000 (MME 2000) inertial frame to the INSIGHT Cruise frame (body fixed). Attitude rates are provided in the MME 2000 frame. The raw IMU data was processed by Tom Kennedy, LMCO (thomas.kennedy@lmco.com). The processed data was integrated into a full trajectory reconstruction by Gene Bonfiglio, JPL (eugene.bonfiglio@jpl.nasa.gov) and Brooke Harper, JPL (brooke.harper@jpl.nasa.gov). Telemetered attitude/rate data was collected from the spacecraft and included in the reconstructed data file as separate records. Combination of the telemetry and high-rate data and generation of this CK file was performed by Mark Johnson, LMCO (mark.z.johnson@lmco.com) using the MSOPCK program (see Appendix 1 for the MSOPCK Setup and Run-time Traceback). The coverage of the file was shortened using the CKSLICER program (see Appendix 2 for the CKSLICER log). Approximate Time Coverage -------------------------------------------------------- This file is a type 3 CK file which provides continuous coverage by linearly interpolating between all orientation data points stored in the file. It covers the following time interval: COVERAGE BEGIN TIME (UTC): 2018-NOV-26 19:32:05.337 COVERAGE END TIME (UTC): 2018-NOV-26 19:45:12.740 Usage Note -------------------------------------------------------- In order to use this file an INSIGHT SCLK file, containing coefficients mapping INSIGHT on-board time to ET, standard LSK file, providing UTC to ET mapping, and INSIGHT Frames kernel, providing definition of the INSIGHT cruise and MME 2000 frames must be loaded into a user program. Contacts -------------------------------------------------------- If you have questions regarding this data contact INSIGHT EDL Team: Mark A. Johnson (303)-971-2169 Mark.Z.Johnson@lmco.com or NAIF: Boris Semenov (818)-354-8136, Boris.Semenov@jpl.nasa.gov Appendix 1: MSOPCK Setup and Run-time Traceback -------------------------------------------------------- ******************************************************************************* MSOPCK SETUP FILE: k:\matlab\lma_toolbox\mice\kernels\msopcksetupINSIGHT_v4.txt ******************************************************************************* \begindata LSK_FILE_NAME = 'k:\matlab\lma_toolbox\mice\kernels\gen\lsk\naif0012.tls' SCLK_FILE_NAME = 'k:\matlab\lma_toolbox\mice\kernels\sclk_scet\NSY_SCLKSCET.00009.tsc' FRAMES_FILE_NAME = 'k:\matlab\lma_toolbox\mice\kernels\gen\fk\insight_v02.tf' INTERNAL_FILE_NAME = 'INSIGHT s/c orientation' CK_TYPE = 3 CK_SEGMENT_ID = 'INSIGHT s/c orientation' INSTRUMENT_ID = -189000 REFERENCE_FRAME_NAME = 'INSIGHT_MME_2000' ANGULAR_RATE_PRESENT = 'YES' ANGULAR_RATE_FRAME = 'INSTRUMENT' MAXIMUM_VALID_INTERVAL = 1800.0 INPUT_TIME_TYPE = 'UTC' INPUT_DATA_TYPE = 'MSOP QUATERNIONS', PRODUCER_ID = 'Johnson, Mark, LMSS' \begintext ******************************************************************************* RUN-TIME OBTAINED META INFORMATION ******************************************************************************** PRODUCT_CREATION_TIME = 2019-03-07T11:29:35 START_TIME = 2018-11-26T19:19:21.036 STOP_TIME = 2018-11-26T19:45:12.740 ******************************************************************************* INTERPOLATION INTERVALS IN THE FILE SEGMENTS: ******************************************************************************* SEG.SUMMARY: ID -189000, COVERG: 2018-11-26T19:19:21.036 2018-11-26T19:45:12.740 ------------------------------------------------------------------------------- 2018-11-26T19:19:21.036 2018-11-26T19:45:12.740 ******************************************************************************* Appendix 2: CKSLICER Log -------------------------------------------------------- ******************************************************************************* This CK file was created using CKSLICER Utility Ver. 1.3.0, October 28, 2011 linked against SPICE Toolkit Ver. N0066. This file contains a subset of the pointing data between: UTC 2018-11-26T19:32:05.337 and UTC 2018-11-26T19:45:13.000 for segments for the instrument -189000 from the source CK file: insight_rt_high_rate_bkwd_att_and_rate.bc LSK file: /ftp/pub/naif/INSIGHT/kernels/lsk/naif0012.tls and SCLK file(s): /ftp/pub/naif/INSIGHT/kernels/sclk/NSY_SCLKSCET.00012.tsc were used by CKSLICER to support required time conversions. This file was created on 2019-05-02 13:48:22. Text below is the contents of the comment area of the source CK file. ******************************************************************************* End of comments.