M01 Spacecraft Orientation CK File for Cruise, Part 3 =========================================================================== Created by Boris Semenov, NAIF/JPL, November 14, 2001 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 at JPL, Pasadena. 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 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 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 last part of the Cruise phase of the mission: COVERAGE BEGIN TIME (UTC): 2001-09-01T00:00:04.643 COVERAGE END TIME (UTC): 2001-10-23T23:59:59.933 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 with LSK file naif0007.tls and M01 SCLK file ORB1_SCLKSCET.00017.tsc. Contacts -------------------------------------------------------- If you have any question 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_2001-09-01.bc m01_sc_2001-09-02.bc m01_sc_2001-09-03.bc m01_sc_2001-09-04.bc m01_sc_2001-09-05.bc m01_sc_2001-09-06.bc m01_sc_2001-09-07.bc m01_sc_2001-09-08.bc m01_sc_2001-09-09.bc m01_sc_2001-09-10.bc m01_sc_2001-09-11.bc m01_sc_2001-09-12.bc m01_sc_2001-09-13.bc m01_sc_2001-09-14.bc m01_sc_2001-09-15.bc m01_sc_2001-09-16.bc m01_sc_2001-09-17.bc m01_sc_2001-09-18.bc m01_sc_2001-09-19.bc m01_sc_2001-09-20.bc m01_sc_2001-09-21.bc m01_sc_2001-09-22.bc m01_sc_2001-09-23.bc m01_sc_2001-09-24.bc m01_sc_2001-09-25.bc m01_sc_2001-09-26.bc m01_sc_2001-09-27.bc m01_sc_2001-09-28.bc m01_sc_2001-09-29.bc m01_sc_2001-09-30.bc m01_sc_2001-10-01.bc m01_sc_2001-10-02.bc m01_sc_2001-10-03.bc m01_sc_2001-10-04.bc m01_sc_2001-10-05.bc m01_sc_2001-10-06.bc m01_sc_2001-10-07.bc m01_sc_2001-10-08.bc m01_sc_2001-10-09.bc m01_sc_2001-10-10.bc m01_sc_2001-10-11.bc m01_sc_2001-10-12.bc m01_sc_2001-10-13.bc m01_sc_2001-10-14.bc m01_sc_2001-10-15.bc m01_sc_2001-10-16.bc m01_sc_2001-10-17.bc m01_sc_2001-10-18.bc m01_sc_2001-10-19.bc m01_sc_2001-10-20.bc m01_sc_2001-10-21.bc m01_sc_2001-10-22.bc m01_sc_2001-10-23.bc Appendix 2: Interpolation Intervals in the File -------------------------------------------------------- 2001-09-01T00:00:04.643 2001-09-01T02:46:12.556 2001-09-01T02:47:40.556 2001-09-01T02:47:44.556 2001-09-01T02:52:00.552 2001-09-04T04:35:54.177 2001-09-04T06:05:08.129 2001-09-08T21:55:34.609 2001-09-08T21:57:02.609 2001-09-08T22:25:06.610 2001-09-08T22:39:31.809 2001-09-08T22:45:43.808 2001-09-08T22:49:01.812 2001-09-08T22:49:55.812 2001-09-08T22:51:19.812 2001-09-14T14:20:02.939 2001-09-14T15:15:44.142 2001-09-16T05:16:47.027 2001-09-16T05:18:50.226 2001-09-16T06:09:31.027 2001-09-16T08:30:39.032 2001-09-16T08:46:43.031 2001-09-16T08:48:43.031 2001-09-19T13:33:32.089 2001-09-19T13:53:56.092 2001-09-19T14:07:56.091 2001-09-19T14:13:24.090 2001-09-20T06:09:00.143 2001-09-20T06:24:50.142 2001-09-20T06:39:04.145 2001-09-20T06:41:26.145 2001-09-20T21:34:48.210 2001-09-20T21:51:08.208 2001-09-22T14:43:32.287 2001-09-22T14:55:40.290 2001-09-22T14:58:26.290 2001-09-22T15:01:14.290 2001-09-25T02:21:38.378 2001-09-25T02:22:48.377 2001-09-25T02:29:26.377 2001-09-25T02:31:24.377 2001-09-26T21:40:56.344 2001-09-26T21:46:32.344 2001-09-29T21:58:36.257 2001-09-29T22:12:00.256 2001-09-29T22:12:08.256 2001-09-29T22:14:56.256 2001-09-29T22:15:12.256 2001-09-29T22:17:48.256 2001-09-29T22:52:40.355 2001-09-29T22:54:48.257 2001-09-29T23:01:48.256 2001-09-29T23:22:48.255 2001-09-29T23:39:52.254 2001-09-29T23:42:38.253 2001-09-29T23:44:40.253 2001-09-29T23:46:50.253 2001-10-04T04:11:26.110 2001-10-04T04:12:44.109 2001-10-04T04:12:52.113 2001-10-04T04:13:56.113 2001-10-04T22:55:20.077 2001-10-04T23:18:04.079 2001-10-04T23:38:02.077 2001-10-04T23:40:56.077 2001-10-05T22:52:16.040 2001-10-05T22:56:54.040 2001-10-08T22:48:19.918 2001-10-08T22:52:31.918 2001-10-12T16:55:38.028 2001-10-12T16:56:46.028 2001-10-14T21:20:05.894 2001-10-14T21:31:55.893 2001-10-15T21:19:01.833 2001-10-15T21:30:55.832 2001-10-16T23:47:43.765 2001-10-17T00:06:53.763 2001-10-17T01:02:49.759 2001-10-17T01:04:55.759 2001-10-17T16:51:49.723 2001-10-17T16:55:25.723 2001-10-17T20:07:13.712 2001-10-17T20:13:49.712 2001-10-17T20:23:07.711 2001-10-17T20:24:09.711 2001-10-19T04:19:57.626 2001-10-19T04:21:53.630 2001-10-19T05:46:57.619 2001-10-19T09:32:29.712 2001-10-19T09:48:57.609 2001-10-19T09:53:25.609 2001-10-19T21:13:45.577 2001-10-19T21:25:37.576 2001-10-21T15:48:49.452 2001-10-21T15:52:29.452 2001-10-21T16:05:33.451 2001-10-21T16:06:49.451 2001-10-21T16:07:41.454 2001-10-21T16:09:01.454 2001-10-21T16:10:05.454 2001-10-21T16:12:45.454 2001-10-21T16:12:45.454 2001-10-21T16:17:57.454 2001-10-23T00:43:37.616 2001-10-23T00:45:37.616 2001-10-23T00:52:43.616 2001-10-23T00:58:29.619 2001-10-23T17:49:52.840 2001-10-23T17:54:04.844 2001-10-23T23:59:59.933