Log file for SPACIT Version 7.1.1. ******************************************************************************** Comments From File: near_erosorbit_nav_v1.bsp \beginlabel PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 1024 ^SPICE_KERNEL = "NEAR_EROSORBIT_NAV_V1.BSP" MISSION_NAME = "NEAR EARTH ASTEROID RENDEZVOUS" SPACECRAFT_NAME = "NEAR EARTH ASTEROID RENDEZVOUS" DATA_SET_ID = "NEAR-A-SPICE-6-EROS/ORBIT-V1.0" KERNEL_TYPE_ID = SPK PRODUCT_ID = "NEAR_EROSORBIT_NAV_V1.BSP" PRODUCT_CREATION_TIME = 2001-09-05T12:29:49 PRODUCER_ID = "NEAR-NAV/JPL" MISSION_PHASE_NAME = EROS PRODUCT_VERSION_TYPE = ACTUAL PLATFORM_OR_MOUNTING_NAME = "N/A" START_TIME = 1999-12-31T23:58:56 STOP_TIME = 2001-02-12T19:44:16 SPACECRAFT_CLOCK_START_COUNT = "N/A" SPACECRAFT_CLOCK_STOP_COUNT = "N/A" TARGET_NAME = EROS INSTRUMENT_NAME = "N/A" NAIF_INSTRUMENT_ID = "N/A" SOURCE_PRODUCT_ID = "N/A" NOTE = "See comments in the file for details" OBJECT = SPICE_KERNEL INTERCHANGE_FORMAT = BINARY KERNEL_TYPE = EPHEMERIS DESCRIPTION = "NEAR spacecraft trajectory SPK file covering the end of cruise, Eros orbit insertion, whole Eros orbit, and Eros descent and landing phases of the mission created by merging final reconstructed OD solution SPK files from the NEAR NAV Team/JPL. " END_OBJECT = SPICE_KERNEL \endlabel NEAR Eros Orbit SPK file, NEAR NAV Team Solution =========================================================================== Created by Boris Semenov, NAIF/JPL, July 18, 2001. Objects in the Ephemeris -------------------------------------------------------- This file contains ephemeris data for the Near Earth Asteroid Rendezvous (NEAR) spacecraft. NAIF ID code for NEAR is -93. Approximate Time Coverage -------------------------------------------------------- This file covers the end of cruise, Eros orbit insertion, whole Eros orbit, and Eros descent and landing phases of the mission: COVERAGE BEGIN TIME (ET) COVERAGE END TIME (ET) ------------------------ ------------------------ 2000 JAN 01 00:00:00.000 2001 FEB 12 19:45:20.000 To provide continuous gap-less file coverage, the coverages of the individual segments in the file overlap. In cases when segments overlap, there can be a trajectory discontinuity. These discontinuities are summarized in the Appendix 1 of these comments. Status -------------------------------------------------------- This SPK file contains the final NEAR orbit reconstruction solution provided by the NEAR NAV team at JPL. Pedigree -------------------------------------------------------- The original SPK files used to make this file were created and delivered to the NEAR project by the NEAR NAV team at JPL. The data from the following original files have been included into this file: Original SPK File Name Start Time (ET) Stop Time (ET) ------------------------------- ---------------- ---------------- near_1999218_2000101_merged_v02 2000-01-01 00:00 2000-02-09 00:00 near_2000040_2001043_merged_v01 2000-02-09 00:00 2001-02-12 17:57 near_land_case44 2001-02-12 17:57 2001-02-12 19:45 The comments from the original SPK files are provided in the Appendix 2 of these comments. Contacts -------------------------------------------------------- If you have any questions regarding this data contact Boris V. Semenov, NAIF/JPL +1 818 354-8136 bsemenov@spice.jpl.nasa.gov or the members of the NEAR NAV team at JPL: James K. Miller +1 818 354-4652 James.K.Miller@jpl.nasa.gov Steven R. Chesley +1 818 354-9615 Steven.R.Chesley@jpl.nasa.gov Peter G. Antreasian +1 818 354-4381 Peter.G.Antreasian@jpl.nasa.gov Appendix 1: Segment Boundary Discontinuities =========================================================================== This table summarizes the discontinuities at the segment boundaries. BOUNDARY TIME (UTC) DOWNTRK INPLANE NORMAL ------------------------ ------- ------- ------- 2000-01-02T23:58:55.816 19.519 -36.699 20.260 2000-02-08T22:58:55.815 20.265 0.005 -0.222 2000-02-08T23:58:55.815 15.851 -1.792 3.066 2000-04-30T16:58:55.814 -0.006 0.002 -0.003 2000-07-31T20:58:55.816 0.006 -0.002 0.000 2000-09-21T23:58:55.817 0.006 0.007 0.001 2000-10-26T17:58:55.817 0.010 0.002 0.005 2000-12-07T15:58:55.816 -0.035 -0.058 -0.034 2000-12-27T19:58:55.816 -0.003 -0.006 -0.004 2001-01-19T23:58:55.815 -0.001 0.007 0.007 2001-01-28T18:58:55.815 0.004 -0.001 -0.000 2001-02-06T17:58:55.815 0.000 -0.018 0.001 2001-02-12T17:55:55.814 0.008 -0.021 0.011 The table consists of 4 columns. The first column contains the UTC time at which a segment boundary with discontinuity occurs. The next three columns (2..4) contain view coordinate frame components in kilometers -- ``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. Appendix 2: Comments From the Original SPK Files =========================================================================== Comments from ``near_1999218_2000101_merged_v02.bsp'' -------------------------------------------------------- ; /usr3/pga/spkmerge/near_1999218_2000101_merged_v02.bsp LOG FILE ; Created 2000-02-22/16:16:22.00. ; ; BEGIN SPKMERGE COMMANDS LEAPSECONDS_KERNEL = /usr2/nnav/dat/naif0007.tls SPK_KERNEL = /usr3/pga/spkmerge/near_1999218_2000101_mer ged_v02.bsp LOG_FILE = near_1999218_2000101_merged_v02.log SOURCE_SPK_KERNEL = /usr2/nnav/export/curr/near_2000052_2000101 _v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 FEB 21 17:58:55.815 END_TIME = 2000 APR 10 21:19:49.814 SOURCE_SPK_KERNEL = /usr2/nnav/export/curr/near_2000045_2000063_v 01_noburn.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 FEB 14 16:58:55.815 END_TIME = 2000 FEB 21 17:58:55.815 SOURCE_SPK_KERNEL = near_1999218_2000101_merged_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 1999 AUG 05 23:58:55.817 END_TIME = 2000 FEB 14 16:58:55.815 ; END SPKMERGE COMMANDS LABEL_START MISSION_NAME = "NEAR" ORGANIZATION = "JPL" AUTHOR = "Peter Antreasian" CONTACT = "pga@pop.jpl.nasa.gov, 818-354-4381" TYPE = "EPHEMERIS" CREATION_DATE = "22-FEB-2000" TARGET = {EROS} START_UTC = "1999-08-05T23:58:55.815" END_UTC = "2000-04-10T00:00:00" END_DET_UTC = "2000-02-22T00:08:30" SOURCE_FILES = {de403s.bsp, eros9845.bsp} MERGED_FILES = {see spkmerge file list below } DESCRIPTION = "Merged spacecraft trajectory file" BURN1_START_TIME = "1999-08-12T17:00:00 UTC" BURN1_STOP_TIME = "1999-08-12T17:02:00 UTC" BURN2_START_TIME = "1999-10-20T15:29:59 UTC" BURN2_STOP_TIME = "1999-10-20T15:30:11 UTC" BURN3_START_TIME = "1999-12-06T15:29:59 UTC" BURN3_STOP_TIME = "1999-12-06T15:30:09 UTC" BURN4_START_TIME = "2000-02-02T04:59:10 UTC" BURN4_STOP_TIME = "2000-02-02T04:59:11 UTC" BURN5_START_TIME = "2000-02-03T17:00:02 UTC" BURN5_STOP_TIME = "2000-02-03T17:01:07 UTC" BURN6_START_TIME = "2000-02-08T22:00:03 UTC" BURN6_STOP_TIME = "2000-02-08T22:00:28 UTC" BURN7_START_TIME = "2000-02-24T17:00:00 UTC" BURN7_STOP_TIME = "2000-02-24T17:00:16 UTC" BURN8_START_TIME = "2000-03-03T18:00:00 UTC" BURN8_STOP_TIME = "2000-03-03T18:00:02 UTC" BURN9_START_TIME = "2000-04-01T01:00:00 UTC" BURN9_STOP_TIME = "2000-04-01T01:00:03 UTC" LABEL_END FREE FORM COMMENTS: TCM19-23 and OIM are reconstructed. Future burns OCM1,2,3 are included. __________________________________________________________________ _______ spkmerge file list: naif0007.tls near_2000052_2000101_v01.bsp near_2000045_2000063_v01_noburn.bsp near_1999218_2000101_merged_v01.bsp Comments from ``near_2000040_2001043_merged_v01.bsp'' -------------------------------------------------------- ; near_2000040_2001043_merged_reconstr_v01.bsp LOG FILE ; Created 2001-04-27/16:14:02.00. ; ; BEGIN SPKMERGE COMMANDS LEAPSECONDS_KERNEL = /usr2/nnav/dat/naif0007.tls SPK_KERNEL = near_2000040_2001043_merged_reconstr_v01.bsp LOG_FILE = near_2000040_2001043_merged_reconstr_v01.log SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2001020_2001060_ reconstr_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2001 JAN 19 23:58:55.816 END_TIME = 2001 FEB 12 19:44:15.815 SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2000362_2001022_ reconstr_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 DEC 27 19:58:55.816 END_TIME = 2001 JAN 19 23:58:55.816 SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2000342_2000365_ reconstr_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 DEC 07 15:58:55.817 END_TIME = 2000 DEC 27 19:58:55.816 SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2000300_2000345_ reconstr_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 OCT 26 17:58:55.818 END_TIME = 2000 DEC 07 15:58:55.817 SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2000266_2000304_ reconstr_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 SEP 21 23:58:55.818 END_TIME = 2000 OCT 26 17:58:55.818 SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2000213_2000270_ reconstr_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 JUL 31 20:58:55.817 END_TIME = 2000 SEP 21 23:58:55.818 SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2000121_2000215_ reconstr_v01.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 APR 30 16:58:55.815 END_TIME = 2000 JUL 31 20:58:55.817 SOURCE_SPK_KERNEL = /usr2/nnav/export/merged/near_2000040_2000125_ reconstr_v02.bsp INCLUDE_COMMENTS = NO BODIES = -93 BEGIN_TIME = 2000 FEB 08 23:58:55.815 END_TIME = 2000 APR 30 16:58:55.815 ; END SPKMERGE COMMANDS LABEL_START MISSION_NAME = "NEAR" ORGANIZATION = "JPL" AUTHOR = "Steve Chesley" CONTACT = "Steve.Chesley@jpl.nasa.gov, 818-354-9615" TYPE = "EPHEMERIS" CREATION_DATE = "27-APR-2001" TARGET = {EROS} START_UTC = "2000-02-08T23:58:55.818" END_UTC = "2001-02-12T19:44:15.815" END_DET_UTC = "2001-02-12T19:44:15.815" SOURCE_FILES = {erosephem_1999004_2002181.xsp} MERGED_FILES = {none} DESCRIPTION = "Merged spacecraft trajectory" BURN1_START_TIME = "2000-02-14T22:33:00 UTC" BURN1_STOP_TIME = "2000-02-14T22:34:07 UTC" BURN2_START_TIME = "2000-02-24T17:00:00 UTC" BURN2_STOP_TIME = "2000-02-24T17:00:16 UTC" BURN3_START_TIME = "2000-03-03T18:00:00 UTC" BURN3_STOP_TIME = "2000-03-03T18:00:16 UTC" BURN4_START_TIME = "2000-03-15T19:58:00 UTC" BURN4_STOP_TIME = "2000-03-15T19:59:29 UTC" BURN5_START_TIME = "2000-03-23T15:20:00 UTC" BURN5_STOP_TIME = "2000-03-23T15:21:29 UTC" BURN6_START_TIME = "2000-04-02T02:03:20 UTC" BURN6_STOP_TIME = "2000-04-02T02:03:23 UTC" BURN7_START_TIME = "2000-04-11T21:20:00 UTC" BURN7_STOP_TIME = "2000-04-11T21:20:06 UTC" BURN8_START_TIME = "2000-04-22T17:50:00 UTC" BURN8_STOP_TIME = "2000-04-22T17:50:03 UTC" BURN9_START_TIME = "2000-04-30T16:15:00 UTC" BURN9_STOP_TIME = "2000-04-30T16:17:35 UTC" BURN10_START_TIME = "2000-05-10T14:00:00 UTC" BURN10_STOP_TIME = "2000-05-10T14:00:10 UTC" BURN11_START_TIME = "2000-05-17T13:00:00 UTC" BURN11_STOP_TIME = "2000-05-17T13:00:01 UTC" BURN12_START_TIME = "2000-05-24T13:00:00 UTC" BURN12_STOP_TIME = "2000-05-24T13:00:01 UTC" BURN13_START_TIME = "2000-05-31T16:00:00 UTC" BURN13_STOP_TIME = "2000-05-31T16:01:50 UTC" BURN14_START_TIME = "2000-06-07T16:00:00 UTC" BURN14_STOP_TIME = "2000-06-07T16:01:50 UTC" BURN15_START_TIME = "2000-06-14T16:00:00 UTC" BURN15_STOP_TIME = "2000-06-14T16:01:50 UTC" BURN16_START_TIME = "2000-06-21T16:00:00 UTC" BURN16_STOP_TIME = "2000-06-21T16:01:50 UTC" BURN17_START_TIME = "2000-06-28T16:00:00 UTC" BURN17_STOP_TIME = "2000-06-28T16:01:50 UTC" BURN18_START_TIME = "2000-07-07T18:00:00 UTC" BURN18_STOP_TIME = "2000-07-07T18:00:32 UTC" BURN19_START_TIME = "2000-07-14T03:00:00 UTC" BURN19_STOP_TIME = "2000-07-14T03:00:23 UTC" BURN20_START_TIME = "2000-07-24T17:00:00 UTC" BURN20_STOP_TIME = "2000-07-24T17:00:23 UTC" BURN21_START_TIME = "2000-07-31T20:00:00 UTC" BURN21_STOP_TIME = "2000-07-31T20:00:48 UTC" BURN22_START_TIME = "2000-08-08T23:25:00 UTC" BURN22_STOP_TIME = "2000-08-08T23:26:17 UTC" BURN23_START_TIME = "2000-08-26T23:25:00 UTC" BURN23_STOP_TIME = "2000-08-26T23:26:52 UTC" BURN24_START_TIME = "2000-09-05T23:00:02 UTC" BURN24_STOP_TIME = "2000-09-05T23:01:17 UTC" BURN25_START_TIME = "2000-09-20T17:00:00 UTC" BURN25_STOP_TIME = "2000-09-20T17:01:50 UTC" BURN26_START_TIME = "2000-10-13T05:45:00 UTC" BURN26_STOP_TIME = "2000-10-13T05:46:45 UTC" BURN27_START_TIME = "2000-10-20T21:40:00 UTC" BURN27_STOP_TIME = "2000-10-20T21:40:44 UTC" BURN28_START_TIME = "2000-10-25T22:10:00 UTC" BURN28_STOP_TIME = "2000-10-25T22:10:04 UTC" BURN29_START_TIME = "2000-10-26T17:40:00 UTC" BURN29_STOP_TIME = "2000-10-26T17:42:42 UTC" BURN30_START_TIME = "2000-11-03T03:00:00 UTC" BURN30_STOP_TIME = "2000-11-03T03:00:03 UTC" BURN31_START_TIME = "2000-11-15T20:00:00 UTC" BURN31_STOP_TIME = "2000-11-15T20:00:01 UTC" BURN32_START_TIME = "2000-11-29T17:30:00 UTC" BURN32_STOP_TIME = "2000-11-29T17:30:01 UTC" BURN33_START_TIME = "2000-12-07T15:20:00 UTC" BURN33_STOP_TIME = "2000-12-07T15:21:35 UTC" BURN34_START_TIME = "2000-12-13T20:15:00 UTC" BURN34_STOP_TIME = "2000-12-13T20:16:22 UTC" BURN35_START_TIME = "2000-12-27T19:25:00 UTC" BURN35_STOP_TIME = "2000-12-27T19:25:01 UTC" BURN36_START_TIME = "2001-01-09T18:41:40 UTC" BURN36_STOP_TIME = "2001-01-09T18:41:41 UTC" BURN37_START_TIME = "2001-01-24T16:05:00 UTC" BURN37_STOP_TIME = "2001-01-24T16:05:04 UTC" BURN38_START_TIME = "2001-01-28T01:25:00 UTC" BURN38_STOP_TIME = "2001-01-28T01:25:04 UTC" BURN39_START_TIME = "2001-01-28T18:05:00 UTC" BURN39_STOP_TIME = "2001-01-28T18:05:04 UTC" BURN40_START_TIME = "2001-02-02T08:51:00 UTC" BURN40_STOP_TIME = "2001-02-02T08:52:03 UTC" BURN41_START_TIME = "2001-02-06T17:43:56 UTC" BURN41_STOP_TIME = "2001-02-06T17:43:58 UTC" BURN42_START_TIME = "2001-02-12T15:13:56 UTC" BURN42_STOP_TIME = "2001-02-12T15:14:11 UTC" BURN43_START_TIME = "2001-02-12T18:58:52 UTC" BURN43_STOP_TIME = "2001-02-12T19:05:55 UTC" BURN44_START_TIME = "2001-02-12T19:14:13 UTC" BURN44_STOP_TIME = "2001-02-12T19:19:21 UTC" BURN45_START_TIME = "2001-02-12T19:30:13 UTC" BURN45_STOP_TIME = "2001-02-12T19:37:38 UTC" BURN46_START_TIME = "2001-02-12T19:41:13 UTC" BURN46_STOP_TIME = "2001-02-12T19:45:33 UTC" LABEL_END FREE FORM COMMENTS: This trajectory is a merge of all of the orbit phase flight reconstructions to date. It includes the following (46) burns: OIM 14-FEB-2000 15:33:05 UTC OCM-1 24-FEB-2000 17:00:00 UTC OCM-2 03-MAR-2000 18:00:00 UTC MCM-1 15-MAR-2000 19:58:00 UTC MCM-2 23-MAR-2000 15:20:00 UTC OCM-3 02-APR-2000 02:03:20 UTC OCM-4 11-APR-2000 21:20:00 UTC OCM-5 22-APR-2000 17:50:00 UTC OCM-6 30-APR-2000 16:15:00 UTC MCM-3 10-MAY-2000 14:00:00 UTC MCM-4 17-MAY-2000 13:00:00 UTC MCM-5 24-MAY-2000 13:00:00 UTC MCM-6 31-MAY-2000 16:00:00 UTC MCM-7 07-JUN-2000 16:00:00 UTC MCM-8 14-JUN-2000 16:00:00 UTC MCM-9 21-JUN-2000 16:00:00 UTC MCM-10 28-JUN-2000 16:00:00 UTC OCM-7 07-JUL-2000 18:00:00 UTC OCM-8 14-JUL-2000 03:00:00 UTC OCM-9 24-JUL-2000 17:00:00 UTC OCM-10 31-JUL-2000 20:00:00 UTC OCM-11 08-AUG-2000 23:25:00 UTC OCM-12 26-AUG-2000 23:25:00 UTC OCM-13 05-SEP-2000 23:00:00 UTC MCM-12 20-SEP-2000 17:00:00 UTC OCM-14 13-OCT-2000 05:45:00 UTC OCM-15 20-OCT-2000 21:40:00 UTC OCM-16 25-OCT-2000 22:10:00 UTC OCM-17 26-OCT-2000 17:40:00 UTC OCM-18 03-NOV-2000 03:00:00 UTC MCM-13 15-NOV-2000 20:00:00 UTC MCM-14 29-NOV-2000 17:30:00 UTC OCM-19 07-DEC-2000 15:20:00 UTC OCM-20 13-DEC-2000 20:15:00 UTC MCM-15 27-DEC-2000 19:25:00 UTC MCM-16 09-JAN-2001 18:41:40 UTC OCM-21 24-JAN-2001 16:05:00 UTC OCM-22 28-JAN-2001 01:25:00 UTC OCM-23 28-JAN-2001 18:05:00 UTC OCM-24 02-FEB-2001 08:51:00 UTC OCM-25 06-FEB-2001 17:43:56 UTC EMM-1 312-FEB-2001 15:13:56 UTC EMM-2 312-FEB-2001 18:58:52 UTC EMM-3 312-FEB-2001 19:14:13 UTC EMM-4 312-FEB-2001 19:30:13 UTC EMM-5 312-FEB-2001 19:41:13 UTC - This is the merger of files: /usr2/nnav/export/merged/near_2001020_2001060_reconstr_v01.bsp /usr2/nnav/export/merged/near_2000362_2001022_reconstr_v01.bsp /usr2/nnav/export/merged/near_2000342_2000365_reconstr_v01.bsp /usr2/nnav/export/merged/near_2000300_2000345_reconstr_v01.bsp /usr2/nnav/export/merged/near_2000266_2000304_reconstr_v01.bsp /usr2/nnav/export/merged/near_2000213_2000270_reconstr_v01.bsp /usr2/nnav/export/merged/near_2000121_2000215_reconstr_v01.bsp /usr2/nnav/export/merged/near_2000040_2000125_reconstr_v02.bsp Comments from ``near_land_case44.bsp'' -------------------------------------------------------- ; pv.bsp LOG FILE ; ; Created 2001-06-12/03:50:06.00. ; ; BEGIN NIOSPK COMMANDS LEAPSECONDS_FILE = /net/tube/usr2/nnav/dat/leapseconds.ker SPK_FILE = pv.bsp SOURCE_NIO_FILE = pv.nio BODIES = -93 BODY_MAP = 9 2000433 BEGIN_TIME = 2001 FEB 12 17:55:55.8149237 END_TIME = 2001 FEB 12 19:44:55.8149220 ; END NIOSPK COMMANDS ********************************************************************************