M01 Spacecraft Orientation CK File for Aerobraking, 2002-01 =========================================================================== Created by Boris Semenov, NAIF/JPL, Fri Mar 8 09:48:03 PST 2002 Orientation Data in the File -------------------------------------------------------- This file contains orientation and angular velocity data for the Mars-01 Odyssey (M01) spacecraft frame, 'M01_SPACECRAFT', relative to the 'MARSIAU' inertial frame. The NAIF ID code for the 'M01_SPACECRAFT' frame is -53000. Status -------------------------------------------------------- This file was created by NAIF for archiving with the Planetary Data System (PDS) from daily CK files produced by NAIF Team, JPL. Pedigree -------------------------------------------------------- The original CK files used to create this file were officially delivered to the M01 project by the NAIF Team. These files contained spacecraft frame orientation relative to the 'MARSIAU' inertial frame. The orientation was computed, converted to quaternions and filtered on-board; filtered quaternions were transmitted to the Earth in the channelized telemetry. On the ground quaternions were extracted from telemetry and written to daily CK files using the MSOPCK program. The individual daily files were merged together to provide complete coverage on a mission/monthly phase basis. A table containing the complete list of original CK files from which data were included in this file is provided at the end of these comments. Approximate Time Coverage -------------------------------------------------------- This file covers the following interval of the Aerobraking phase of the mission: Coverage Begin UTC Coverage End UTC ------------------------ ------------------------ 2002-JAN-01 00:00:01.169 2002-JAN-31 23:59:57.490 This file is a type 3 CK file which provides linear interpolation between orientation data points extracted from telemetry. Such interpolation is not applied to the whole coverage of the file but only inside intervals where enough orientation telemetry data was available and orientation data points were close to each other in time for such interpolation to make sense. The nominal quaternion time spacing in the telemetry stream varied from a fraction of a second to 3-4 seconds between adjacent data points. Considering that the s/c was nominally nadir pointed for all science data collection periods and three axis stabilized from most other operation regimes, the duration of the longest interval over which the data may be interpolated was set to 60 seconds. For all requests for data falling between two adjacent data points separated by more than 60 seconds the SPICELIB CK readers will return a logical flag stating "POINTING NOT FOUND". A table containing the complete list of valid interpolation intervals in the file is provided at the end of these comments. Angular Rate Data Note -------------------------------------------------------- Data records in this file do not contain actual angular rates computed on-board because the angular rates were not available in all telemetry packets containing quaternions. Instead, the angular rates stored in the file were "manufactured" by MSOPCK program using an assumption that the spacecraft was rotating at a constant rate between each two orientations specified by neighbor quaternions. Usage Note -------------------------------------------------------- In order to use this file an M01 SCLK file containing coefficients mapping M01 on-board time to ET must be loaded into a user's program. Related Kernels -------------------------------------------------------- This file was created using the following LSK and SCLK files: naif0007.tls ORB1_SCLKSCET.00028.tsc Contacts -------------------------------------------------------- If you have any questions regarding this data contact NAIF at JPL: Charles H. Acton, Jr (818)-354-3869 chuck.acton@jpl.nasa.gov Boris V. Semenov (818)-354-8136 boris.semenov@jpl.nasa.gov Appendix 1: List of the original CK files -------------------------------------------------------- m01_sc_2002-01-01.bc m01_sc_2002-01-02.bc m01_sc_2002-01-03.bc m01_sc_2002-01-04.bc m01_sc_2002-01-05.bc m01_sc_2002-01-06.bc m01_sc_2002-01-07.bc m01_sc_2002-01-08.bc m01_sc_2002-01-09.bc m01_sc_2002-01-10.bc m01_sc_2002-01-11.bc m01_sc_2002-01-12.bc m01_sc_2002-01-13.bc m01_sc_2002-01-14.bc m01_sc_2002-01-15.bc m01_sc_2002-01-16.bc m01_sc_2002-01-17.bc m01_sc_2002-01-18.bc m01_sc_2002-01-19.bc m01_sc_2002-01-20.bc m01_sc_2002-01-21.bc m01_sc_2002-01-22.bc m01_sc_2002-01-23.bc m01_sc_2002-01-24.bc m01_sc_2002-01-25.bc m01_sc_2002-01-26.bc m01_sc_2002-01-27.bc m01_sc_2002-01-28.bc m01_sc_2002-01-29.bc m01_sc_2002-01-30.bc m01_sc_2002-01-31.bc Appendix 2: Interpolation Intervals in the File -------------------------------------------------------- The information in this section has been generated by running CKBRIEF utility program using -dump -utc command line options. CKBRIEF Version: 2.0.0, 2001-05-16. SPICE Toolkit Version: N0052. Summary for: m01_sc_ab0201.bc Segment No.: 1 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-01 00:00:01.169 2002-JAN-01 19:25:16.930 Y 2002-JAN-01 19:26:30.629 2002-JAN-01 21:28:36.205 Y 2002-JAN-01 21:31:20.904 2002-JAN-01 23:15:04.883 Y 2002-JAN-01 23:55:51.075 2002-JAN-02 00:20:21.073 Y 2002-JAN-02 00:25:50.670 2002-JAN-02 12:18:24.837 Y 2002-JAN-02 12:21:20.739 2002-JAN-02 20:35:47.834 Y Segment No.: 2 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-02 20:35:47.834 2002-JAN-03 04:17:56.538 Y 2002-JAN-03 04:50:14.730 2002-JAN-03 11:57:38.651 Y 2002-JAN-03 11:58:48.452 2002-JAN-03 12:19:08.646 Y 2002-JAN-03 12:20:38.048 2002-JAN-04 11:13:19.964 Y 2002-JAN-04 11:15:52.964 2002-JAN-04 11:47:55.559 Y 2002-JAN-04 11:49:28.160 2002-JAN-04 12:08:32.154 Y 2002-JAN-04 12:10:48.154 2002-JAN-04 15:59:55.006 Y Segment No.: 3 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-04 15:59:55.006 2002-JAN-04 16:40:56.100 Y 2002-JAN-04 17:15:24.094 2002-JAN-04 19:13:26.275 Y 2002-JAN-04 19:15:12.076 2002-JAN-05 00:13:40.019 Y 2002-JAN-05 00:15:10.519 2002-JAN-05 20:45:59.767 Y 2002-JAN-05 21:18:23.760 2002-JAN-06 05:09:31.867 Y 2002-JAN-06 05:11:51.668 2002-JAN-06 10:22:08.203 Y Segment No.: 4 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-06 10:22:08.203 2002-JAN-06 11:52:43.781 Y 2002-JAN-06 11:54:23.582 2002-JAN-06 12:03:47.581 Y 2002-JAN-06 12:05:37.780 2002-JAN-07 10:58:28.707 Y 2002-JAN-07 11:01:01.707 2002-JAN-07 11:36:42.099 Y 2002-JAN-07 11:45:07.297 2002-JAN-07 11:51:55.296 Y 2002-JAN-07 11:58:43.296 2002-JAN-07 12:03:43.495 Y 2002-JAN-07 12:05:49.494 2002-JAN-07 20:50:47.191 Y 2002-JAN-07 20:52:06.288 2002-JAN-08 01:18:16.042 Y Segment No.: 5 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-08 01:18:16.042 2002-JAN-08 12:03:49.221 Y 2002-JAN-08 12:05:37.220 2002-JAN-09 11:58:50.744 Y 2002-JAN-09 12:00:50.744 2002-JAN-09 16:18:11.291 Y Segment No.: 6 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-09 16:18:11.291 2002-JAN-09 21:46:00.829 Y 2002-JAN-09 21:52:18.625 2002-JAN-10 01:29:46.591 Y 2002-JAN-10 01:31:54.591 2002-JAN-10 05:09:46.552 Y 2002-JAN-10 05:16:58.552 2002-JAN-10 20:27:46.378 Y 2002-JAN-10 21:02:06.371 2002-JAN-11 06:51:34.367 Y 2002-JAN-11 06:54:07.367 2002-JAN-11 07:32:50.758 Y 2002-JAN-11 07:38:38.257 2002-JAN-11 07:56:25.853 Y Segment No.: 7 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-11 07:56:25.853 2002-JAN-11 08:19:36.051 Y 2002-JAN-11 08:21:58.250 2002-JAN-12 08:19:01.847 Y 2002-JAN-12 08:44:05.841 2002-JAN-12 08:44:42.044 Y 2002-JAN-12 08:47:17.840 2002-JAN-12 10:15:01.813 Y 2002-JAN-12 10:43:17.803 2002-JAN-12 11:38:05.990 Y 2002-JAN-12 11:39:53.786 2002-JAN-12 11:54:01.781 Y 2002-JAN-12 12:40:32.968 2002-JAN-12 14:06:53.941 Y 2002-JAN-12 14:32:17.732 2002-JAN-12 14:32:41.935 Y 2002-JAN-12 14:36:41.732 2002-JAN-12 15:01:57.722 Y 2002-JAN-12 15:03:45.722 2002-JAN-14 07:42:44.962 Y Segment No.: 8 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-14 07:42:44.962 2002-JAN-14 16:22:12.795 Y 2002-JAN-14 16:55:36.785 2002-JAN-14 21:29:22.901 Y 2002-JAN-14 21:30:24.698 2002-JAN-14 21:39:10.901 Y 2002-JAN-14 21:41:22.900 2002-JAN-14 22:10:12.687 Y 2002-JAN-14 22:34:00.681 2002-JAN-14 22:34:48.681 Y 2002-JAN-14 22:36:56.681 2002-JAN-15 23:31:16.296 Y 2002-JAN-15 23:43:28.295 2002-JAN-15 23:43:48.295 Y 2002-JAN-15 23:51:16.291 2002-JAN-17 07:13:46.033 Y Segment No.: 9 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-17 07:13:46.033 2002-JAN-17 21:40:51.816 Y 2002-JAN-17 21:41:55.617 2002-JAN-18 15:51:43.354 Y 2002-JAN-18 16:18:47.348 2002-JAN-19 19:31:38.946 Y 2002-JAN-19 19:33:33.145 2002-JAN-19 19:36:33.144 Y 2002-JAN-19 19:38:09.144 2002-JAN-20 02:14:02.849 Y Segment No.: 10 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-20 02:14:02.849 2002-JAN-20 13:18:50.681 Y 2002-JAN-20 13:43:02.675 2002-JAN-21 03:09:58.468 Y 2002-JAN-21 03:31:08.665 2002-JAN-21 10:39:20.561 Y 2002-JAN-21 10:40:58.358 2002-JAN-22 13:11:56.155 Y 2002-JAN-22 13:17:25.951 2002-JAN-22 22:11:49.815 Y Segment No.: 11 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-22 22:11:49.815 2002-JAN-23 03:29:41.732 Y 2002-JAN-23 03:36:17.731 2002-JAN-23 11:51:45.606 Y 2002-JAN-23 11:57:45.601 2002-JAN-23 12:00:01.804 Y 2002-JAN-23 12:01:37.601 2002-JAN-23 12:01:45.601 Y 2002-JAN-23 12:03:05.601 2002-JAN-25 11:09:01.055 Y 2002-JAN-25 11:11:28.856 2002-JAN-25 11:28:40.850 Y 2002-JAN-25 11:30:31.049 2002-JAN-25 18:08:36.745 Y Segment No.: 12 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-25 18:08:36.745 2002-JAN-27 04:12:36.398 Y 2002-JAN-27 04:15:04.194 2002-JAN-28 03:36:00.005 Y 2002-JAN-28 03:37:06.005 2002-JAN-28 03:58:27.800 Y 2002-JAN-28 04:00:05.999 2002-JAN-28 09:04:55.716 Y 2002-JAN-28 09:18:31.711 2002-JAN-28 09:19:35.711 Y 2002-JAN-28 09:21:43.711 2002-JAN-28 10:57:07.682 Y 2002-JAN-28 14:24:31.624 2002-JAN-28 14:34:47.724 Y 2002-JAN-28 14:58:59.816 2002-JAN-28 18:47:22.752 Y Segment No.: 13 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-28 18:47:22.752 2002-JAN-28 22:05:15.499 Y 2002-JAN-28 22:06:43.498 2002-JAN-29 01:58:55.434 Y 2002-JAN-29 02:51:05.616 2002-JAN-29 14:17:11.224 Y 2002-JAN-29 14:24:26.423 2002-JAN-30 19:41:58.016 Y 2002-JAN-30 19:43:30.016 2002-JAN-30 20:15:10.009 Y 2002-JAN-30 20:17:06.009 2002-JAN-30 20:25:26.008 Y 2002-JAN-30 20:39:06.003 2002-JAN-30 20:39:58.003 Y 2002-JAN-30 20:41:58.003 2002-JAN-31 15:45:48.978 Y Segment No.: 14 Object: -53000 Interval Begin UTC Interval End UTC AV ------------------------ ------------------------ --- 2002-JAN-31 15:45:48.978 2002-JAN-31 23:59:57.490 Y