2001 Mars Odyssey Extended Phase SPK, M01 NAV Solution =========================================================================== Created by Boris Semenov, NAIF/JPL, Mon Feb 4 18:03:08 PST 2013 Objects in the Ephemeris -------------------------------------------------------- This SPK file contains ephemeris data for the 2001 Mars Odyssey (M01) spacecraft. The NAIF ID code for M01 is -53. Approximate Time Coverage -------------------------------------------------------- This file covers the following part of the Extended Phase of the M01 mission (orbits 47897 through 49014): Start of Interval (ET) End of Interval (ET) -------------------------------- -------------------------------- 2012 OCT 01 00:01:07.182 2013 JAN 01 01:01:07.183 Status -------------------------------------------------------- This file was created by merging regular reconstructed OD solution SPK files produced by the M01 NAV team during the Extended Phase of the mission. This file was created by NAIF for archiving in the Planetary Data System (PDS). Pedigree -------------------------------------------------------- The original SPK files used to create this file contained only reconstructed trajectory. They were officially delivered to the M01 project data base by the M01 NAV team. The list of the original files data from which has been merged into this file is provided in Appendix 1 of these comments. Segment Boundary Discontinuities -------------------------------------------------------- This SPK file contains a large number of SPK segments that came from original individual SPK files. Although, each segment provides continuous trajectory within the interval that it covers, in general a position and velocity discontinuity exists at the boundary of the segment and the segments whose coverages immediately precede or follow it. The times and magnitudes of these discontinuities are provided in Appendix 2 of these comments. Usage -------------------------------------------------------- This file should be used together with DE405 planetary ephemeris and MAR063 satellite ephemeris since the original SPK files contained subsets of these particular ephemeris in them. Contacts -------------------------------------------------------- If you have questions regarding this data contact Boris V. Semenov (818)-354-8136 Boris.Semenov@jpl.nasa.gov Appendix 1: Original SPK List -------------------------------------------------------- The original SPK files, the data from which has been included into this file, are: spk_m_od47849-47931_rec_v1.bsp spk_m_od47929-48020_rec_v1.bsp spk_m_od48017-48101_rec_v1.bsp spk_m_od48100-48185_rec_v1.bsp spk_m_od48184-48277_rec_v1.bsp spk_m_od48276-48323_rec_v1.bsp spk_m_od48320-48441_rec_v1.bsp spk_m_od48440-48513_rec_v1.bsp spk_m_od48512-48611_rec_v1.bsp spk_m_od48610-48698_rec_v1.bsp spk_m_od48697-48781_rec_v1.bsp spk_m_od48780-48868_rec_v1.bsp spk_m_od48864-48942_rec_v1.bsp spk_m_od48941-49042_rec_v1.bsp Appendix 2: Segment Boundary Discontinuity Summary -------------------------------------------------------- This SPK file contains a large number of SPK segments that came from original individual SPK files. Although, each segment provides continuous trajectory within the interval that it covers, in general a position and velocity discontinuity exists at the boundary of the segment and the segments whose coverage immediately precede and follow it. The times and magnitudes of these discontinuities are provided in the table included in this Appendix. The top portion of the table contains the name of this SPK file. All descriptive lines in the top portion of the file start with the ``#'' character to allow direct plotting of the data in the freeware ``gnuplot'' application. The table consists of 5 columns. The first column is the orbit number within which a segment boundary with discontinuity occurs. The next column contains the UTC time of that segment boundary. The last three columns (3..5) contain view coordinate frame components -- ``down track'' (this direction is parallel to the velocity vector), ``normal to plane'' (this direction is computed as cross product of position vector by velocity vector) and ``in plane'' (this direction is computed as a cross product of ``down track'' by ``normal to plane'') -- of the difference between the state vectors computed at that UTC time defining segment boundary at which a discontinuity exists. The pairs of segments and discontinuity times are determined using an algorithm that emulates the standard SPK loading priority -- ``last loaded segment takes precedence''. Therefore, the discontinuities summarized in the file are those which a user reading file would actually see. The difference components in the view coordinate frame were computed for each discontinuity using the following algorithm: -- A single state was computed from each pair of segment the J2000 frame at the time of discontinuity. -- For this pair of states, a position difference vector was computed by subtracting the state computed from the segment with higher priority from the state computed from segment with lower priority. Then, a frame transformation matrix rotating these difference vectors from J2000 to the view coordinate frame defined by the state obtained from the higher priority segment was computed, and the position difference vector was rotated to the view frame coordinates using this matrix. The segment boundary discontinuities for this file are: # # Summary of discontinuities at segment boundaries for # SPK file ./m01_ext33.bsp: # #ORBNUM BOUNDARY TIME (UTC) DOWNTRK INPLANE NORMAL #------- ----------------------- ------- ------- ------- 47911 2012-10-02T05:03:52.817 0.004 0.000 0.001 47928 2012-10-03T14:33:52.817 -0.009 0.000 -0.002 47946 2012-10-05T02:13:52.817 -0.018 0.001 -0.003 47962 2012-10-06T10:38:52.817 0.000 0.001 -0.000 47982 2012-10-08T00:44:22.817 -0.010 0.000 -0.000 47995 2012-10-09T02:23:52.817 -0.005 0.000 -0.000 48007 2012-10-10T02:23:52.817 0.019 -0.000 0.003 48016 2012-10-10T20:58:52.817 -0.010 -0.000 0.001 48031 2012-10-12T01:58:52.817 -0.015 0.000 -0.002 48050 2012-10-13T15:58:52.817 0.001 0.000 -0.000 48063 2012-10-14T18:08:52.817 -0.029 0.001 0.004 48079 2012-10-16T01:48:17.817 -0.008 0.000 0.001 48092 2012-10-17T02:03:52.817 0.032 -0.000 0.003 48099 2012-10-17T15:50:52.817 -0.010 -0.000 -0.001 48113 2012-10-18T20:28:52.817 -0.049 -0.000 0.003 48124 2012-10-19T18:13:52.817 0.019 -0.000 -0.001 48138 2012-10-20T22:06:52.817 0.015 0.000 -0.002 48154 2012-10-22T05:03:52.817 0.032 -0.001 0.002 48166 2012-10-23T05:33:52.817 -0.023 -0.001 0.002 48183 2012-10-24T13:48:52.817 -0.002 -0.000 -0.000 48199 2012-10-25T21:46:47.817 0.004 -0.000 0.000 48215 2012-10-27T04:56:57.817 0.013 0.001 0.001 48224 2012-10-27T22:41:57.817 0.028 0.000 0.001 48236 2012-10-28T23:27:22.817 -0.012 0.000 0.001 48249 2012-10-30T01:28:52.817 -0.032 0.000 0.002 48261 2012-10-31T01:03:52.817 0.057 0.000 -0.005 48275 2012-11-01T04:43:52.817 0.037 -0.000 -0.003 48287 2012-11-02T03:02:52.817 0.010 0.000 0.001 48296 2012-11-02T22:14:52.817 0.042 0.001 -0.003 48306 2012-11-03T17:58:52.817 0.013 0.000 -0.001 48318 2012-11-04T17:05:52.817 0.022 -0.000 -0.001 48319 2012-11-04T19:13:52.817 -0.046 -0.000 0.003 48330 2012-11-05T17:23:52.817 0.166 0.002 -0.009 48347 2012-11-07T01:28:52.817 0.021 0.000 0.001 48359 2012-11-08T01:30:37.817 0.059 -0.000 0.004 48369 2012-11-08T21:03:52.817 -0.031 -0.000 -0.002 48382 2012-11-09T23:48:52.817 0.015 0.001 -0.001 48388 2012-11-10T10:38:52.817 0.036 0.001 0.003 48402 2012-11-11T14:13:47.817 -0.039 -0.001 -0.003 48419 2012-11-13T01:27:17.817 -0.024 -0.001 -0.001 48439 2012-11-14T16:10:22.817 -0.072 -0.000 0.007 48459 2012-11-16T08:17:22.817 0.022 -0.000 0.000 48476 2012-11-17T17:27:12.817 -0.030 -0.000 0.003 48490 2012-11-18T20:27:12.817 0.053 0.000 -0.001 48500 2012-11-19T17:11:52.817 0.060 0.000 0.001 48511 2012-11-20T14:58:52.817 0.013 0.000 0.001 48529 2012-11-22T01:33:52.817 -0.024 0.000 0.001 48539 2012-11-22T21:05:52.817 0.073 -0.000 0.002 48548 2012-11-23T15:48:52.817 -0.085 -0.000 0.004 48552 2012-11-24T00:09:52.817 -0.071 -0.000 -0.009 48564 2012-11-24T22:02:52.817 -0.037 -0.000 -0.005 48576 2012-11-25T21:44:52.817 -0.017 -0.000 -0.002 48584 2012-11-26T13:33:52.817 0.002 0.000 0.000 48598 2012-11-27T17:27:12.816 -0.082 -0.001 -0.008 48609 2012-11-28T15:14:42.816 -0.041 -0.000 -0.003 48626 2012-11-30T01:47:32.816 -0.069 -0.001 0.005 48646 2012-12-01T16:37:02.816 0.041 -0.000 -0.004 48658 2012-12-02T17:22:02.816 0.084 0.000 0.011 48671 2012-12-03T17:22:02.816 0.056 0.001 0.010 48674 2012-12-04T00:53:52.816 0.084 0.000 0.009 48685 2012-12-04T21:58:52.816 0.037 -0.000 -0.007 48696 2012-12-05T18:53:52.816 -0.022 0.000 -0.004 48714 2012-12-07T06:53:52.816 -0.022 0.001 0.002 48730 2012-12-08T15:38:52.816 -0.080 -0.000 -0.015 48746 2012-12-09T21:28:52.816 -0.022 -0.000 -0.005 48756 2012-12-10T17:38:52.816 0.024 0.000 0.001 48768 2012-12-11T17:38:52.816 -0.073 0.001 0.013 48779 2012-12-12T15:57:52.816 -0.029 -0.000 0.003 48792 2012-12-13T17:37:52.816 0.067 -0.000 -0.007 48804 2012-12-14T17:23:52.816 0.005 -0.000 -0.000 48816 2012-12-15T17:38:52.816 -0.047 -0.000 -0.012 48828 2012-12-16T16:28:52.816 0.033 0.000 -0.008 48843 2012-12-17T21:23:52.816 0.050 0.000 0.004 48854 2012-12-18T20:21:22.816 0.015 0.000 0.002 48863 2012-12-19T13:50:52.816 -0.045 0.000 0.005 48878 2012-12-20T18:38:52.816 0.002 0.000 -0.000 48892 2012-12-21T22:14:52.816 -0.030 0.000 -0.001 48900 2012-12-22T15:10:52.816 -0.054 0.000 -0.007 48914 2012-12-23T17:38:52.816 -0.026 -0.000 -0.002 48929 2012-12-24T23:11:17.816 -0.064 -0.000 -0.010 48940 2012-12-25T22:13:52.816 0.031 0.000 0.006 48952 2012-12-26T20:58:52.816 0.038 -0.001 -0.008 48962 2012-12-27T17:38:52.816 0.031 0.000 0.005 48974 2012-12-28T17:38:52.816 -0.007 -0.000 -0.002 48986 2012-12-29T15:39:52.816 -0.003 0.000 -0.001 48999 2012-12-30T17:42:52.816 -0.015 -0.000 0.002 49012 2012-12-31T20:27:52.816 0.032 0.000 0.007