JUNO Nominal Orientation CK File, for 03/26/15 Reference Trajectory, ver 0.1 ============================================================= Created on April 9, 2015 by Boris Semenov, NAIF/JPL. Summary ------------------------------------------------------------- This CK contains the nominal orientation of the JUNO spacecraft frame (JUNO_SPACECRAFT) based on the spin axis pointing and rotation timelines for the attitude specification from Stuart Stephens' spreadsheet Juno_CK_Specs_for_150326_Ref_Traj_150408.xlsx from 04/08/15. Implementation Notes ------------------------------------------------------------- The JUNO_SPACECRAFT orientation is provided in this file using a combination of two kinds of segments: - segments providing the orientation of the JUNO spin axis (+Z) encapsulated in the orientation of the JUNO_SPIN_AXIS frame (frame ID -61900) relative to the J2000 inertial frame. These segments were generated using SPICE utility program "prediCkt" based on the spin axis pointing profile from the source e-mail. See Appendix 1 below for more details about these segments ("prediCkt" inputs, fit accuracy, etc.) - segments providing the rotation of the spacecraft about the spin axis encapsulated in the orientation of the JUNO_SPACECRAFT frame (frame ID -61000) relative to the JUNO_SPIN_AXIS frame. These segments were generated using SPICE utility program "msopck" based on the rotation profile from the source e-mail. See Appendix 2 below for details about these segments ("msopck" setup parameters, input, etc.). The segments generated by "prediCkt" and "msopck" were merged together into a single file (this file) using SPICE utility "dafcat". After merging the file was augmented with these comments. Modeling Notes ------------------------------------------------------------- Users of this CK file should be aware that: - the time-lines in the source spreadsheet did not include Earth-repointing precessions - the spin axis pointing (+Z of the JUNO_SPIN_AXIS frame) was modeled to be within 0.25 degrees of JUNO-Earth, or JUNO-Anti Orbital Momentum Vector (depending of the attitude mode). The ZX plane of the JUNO_SPIN_AXIS frame was modeled to always contain Ecliptic North, with the +X axis to be as close to it as possible. - five minute windows were used for continuous transitions between the spin axis pointing modes. Coverage ------------------------------------------------------------- This file provides the continuous coverage for the following time period: Begin UTC End UTC ------------------------ ------------------------ 2015-MAR-25 23:58:53.816 2018-FEB-21 11:39:42.814 Related Kernels ------------------------------------------------------------- This was generated with and must be used together with the following kernels: Type Name ---- ------------------------------------------ LSK naif0011.tls SCLK JNO_SCLKSCET.00030.tsc FK juno_v08.tf (or later version) SPK jup310.bsp SPK spk_ref_150326_180221_150326.bsp Contact Information ------------------------------------------------------------- Contact Boris Semenov (Boris.Semenov@jpl.nasa.gov) if you have any questions regarding this file. Appendix 1: Information for Spin Axis Orientation Segments ============================================================= This C-kernel was produced using the SPICE program "prediCkt" on 2015-APR-09 16:24:23. The following files were provided in support of the construction of the attitude given in this kernel. File Type Name ---- ------------------------------------------ SPK jup310.bsp SPK spk_ref_150326_180221_150326.bsp TEXT naif0011.tls This C-kernel matches the specification given below to 0.25000 degrees. The text kernel used to specify the orientation of structures included in this file is given below. ============================================================= Spin Axis Orientation ----------------------------------------------------------------- The spin axis Orientation segments contain the orientation data for the JUNO_SPIN_AXIS frame (frame ID -61900) relative to the J2000 inertial frame based on the attitude specification from Stuart Stephens' spreadsheet Juno_CK_Specs_for_150326_Ref_Traj_150408.xlsx. These segments were generated using PREDICKT with the direction, orientation, and schedule specifications provided below based on the spreadsheet data. Directions ----------------------------------------------------------------- The directions defined in this section are based on the descriptions from sheet 3 of the spreadsheet. TOSUN is the geometric position of the Sun relative to JUNO. TOEARTH is the geometric position of the Earth relative to JUNO. JUNOPOS is the geometric position of JUNO relative to Jupiter. JUNOVEL is the geometric velocity of JUNO relative to Jupiter. JUNOORB is the JUNO orbital momentum vector computed as the cross product of the JUNO position and velocity relative to Jupiter. JUNOORB14 is the JUNO orbital momentum vector rotated by -14 degrees about JUNOPOS. ECLIPN is the +Z axis (North pole) of the Ecliptic of J2000 inertial frame (ECLIPJ2000). JOIZ is the reference direction for +Z axis during JOI burn -- RA=268.422 deg, Dec=62.359 deg in EME2000. PRMZ is the reference direction for +Z axis during PRM burn -- RA=268.381 deg, Dec=60.061 deg in EME2000. DEORBITZ is the reference direction for +Z axis during the Deorbit burn -- RA=88.163 deg, Dec=-28.354 deg in EME2000. \begindata DIRECTION_SPECS += ( 'TOSUN = POSITION OF SUN -' ) DIRECTION_SPECS += ( 'FROM JUNO -' ) DIRECTION_SPECS += ( 'CORRECTION NONE' ) DIRECTION_SPECS += ( 'TOEARTH = POSITION OF EARTH -' ) DIRECTION_SPECS += ( 'FROM JUNO -' ) DIRECTION_SPECS += ( 'CORRECTION NONE' ) DIRECTION_SPECS += ( 'JUNOPOS = POSITION OF JUNO -' ) DIRECTION_SPECS += ( 'FROM JUPITER -' ) DIRECTION_SPECS += ( 'CORRECTION NONE' ) DIRECTION_SPECS += ( 'JUNOVEL = VELOCITY OF JUNO -' ) DIRECTION_SPECS += ( 'FROM JUPITER -' ) DIRECTION_SPECS += ( 'CORRECTION NONE' ) DIRECTION_SPECS += ( 'JUNOORB = CROSS PRODUCT -' ) DIRECTION_SPECS += ( 'JUNOPOS JUNOVEL ' ) DIRECTION_SPECS += ( 'JUNOORB14 = ROTATE JUNOORB -' ) DIRECTION_SPECS += ( '-14 DEGREES -' ) DIRECTION_SPECS += ( 'ABOUT JUNOPOS ' ) DIRECTION_SPECS += ( 'ECLIPN = FIXED ECLIPJ2000 -' ) DIRECTION_SPECS += ( 'XYZ 0 0 1' ) DIRECTION_SPECS += ( 'JOIZ = FIXED J2000 -' ) DIRECTION_SPECS += ( 'RA 268.422 degrees -' ) DIRECTION_SPECS += ( 'DEC 62.359 degrees ' ) DIRECTION_SPECS += ( 'PRMZ = FIXED J2000 -' ) DIRECTION_SPECS += ( 'RA 268.381 degrees -' ) DIRECTION_SPECS += ( 'DEC 60.061 degrees ' ) DIRECTION_SPECS += ( 'DEORBITZ = FIXED J2000 -' ) DIRECTION_SPECS += ( 'RA 88.163 degrees -' ) DIRECTION_SPECS += ( 'DEC -28.354 degrees ' ) \begintext Orientations ----------------------------------------------------------------- The orientation modes defined in this section are based on the descriptions from sheet 3 of the spreadsheet. SUNPOINTED orientation has +Z along direction from JUNO to the Sun and Ecliptic North pole defining the ZX plane. EARTHPOINTED orientation has +Z along direction from JUNO to the Earth and Ecliptic North pole defining the ZX plane. MWRATTITUDE orientation has -Z along JUNO orbital momentum vector (POS cross VEL) and Ecliptic North pole defining the ZX plane. MWRATTITUDETILT14 orientation has -Z along JUNO orbital momentum vector (POS cross VEL) rotated by -14 degrees about POS and Ecliptic North pole defining the ZX plane. JOIBURN orientation has +Z along the reference direction during the JOI burn and Ecliptic North pole defining the ZX plane. PRMBURN orientation has +Z along the reference direction during the PRM burn and Ecliptic North pole defining the ZX plane. DEORBITBURN orientation has +Z along the reference direction during the DEORBIT burn and Ecliptic North pole defining the ZX plane. \begindata ORIENTATION_NAME += 'SUNPOINTED' PRIMARY += '+Z = TOSUN' SECONDARY += '+X = ECLIPN' BASE_FRAME += 'J2000' ORIENTATION_NAME += 'EARTHPOINTED' PRIMARY += '+Z = TOEARTH' SECONDARY += '+X = ECLIPN' BASE_FRAME += 'J2000' ORIENTATION_NAME += 'MWRATTITUDE' PRIMARY += '-Z = JUNOORB' SECONDARY += '+X = ECLIPN' BASE_FRAME += 'J2000' ORIENTATION_NAME += 'MWRATTITUDETILT14' PRIMARY += '-Z = JUNOORB14' SECONDARY += '+X = ECLIPN' BASE_FRAME += 'J2000' ORIENTATION_NAME += 'JOIBURN' PRIMARY += '+Z = JOIZ' SECONDARY += '+X = ECLIPN' BASE_FRAME += 'J2000' ORIENTATION_NAME += 'PRMBURN' PRIMARY += '+Z = PRMZ' SECONDARY += '+X = ECLIPN' BASE_FRAME += 'J2000' ORIENTATION_NAME += 'DEORBITBURN' PRIMARY += '+Z = DEORBITZ' SECONDARY += '+X = ECLIPN' BASE_FRAME += 'J2000' \begintext Schedule ----------------------------------------------------------------- The orientation schedule defined in this section implements the spin axis pointing timeline from sheet 1 of the spreadsheet. These times in 'AT' modifiers and START/STOP keywords are given as ETs. Five minute gaps were inserted at the attitude mode boundaries to ensure smooth transitions. \begindata CK-SCLK = 61 CK-SPK = -61 CK-FRAMES = -61900 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2015-03-26/00:00:01 CK-61900STOP += @2016-07-05/01:51:16.184 CK-61900ORIENTATION += 'JOIBURN AT 2016-07-05/02:48:46.184' CK-61900START += @2016-07-05/01:46:16.184 CK-61900STOP += @2016-07-05/03:51:16.184 CK-61900ORIENTATION += 'SUNPOINTED AT 2016-07-05/03:48:46.184' CK-61900START += @2016-07-05/03:46:16.184 CK-61900STOP += @2016-07-05/14:51:16.184 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-07-05/14:46:16.184 CK-61900STOP += @2016-08-26/17:54:58.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2016-08-27/09:52:28.183' CK-61900START += @2016-08-26/17:49:58.183 CK-61900STOP += @2016-08-27/20:24:58.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-08-27/20:19:58.183 CK-61900STOP += @2016-10-19/17:14:45.182 CK-61900ORIENTATION += 'PRMBURN AT 2016-10-19/18:12:15.182' CK-61900START += @2016-10-19/17:09:45.182 CK-61900STOP += @2016-10-19/19:14:45.182 CK-61900ORIENTATION += 'SUNPOINTED AT 2016-10-19/19:12:15.182' CK-61900START += @2016-10-19/19:09:45.182 CK-61900STOP += @2016-10-20/06:14:45.182 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-10-20/06:09:45.182 CK-61900STOP += @2016-11-01/22:56:07.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2016-11-02/14:53:37.183' CK-61900START += @2016-11-01/22:51:07.183 CK-61900STOP += @2016-11-02/22:13:07.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-11-02/22:08:07.183 CK-61900STOP += @2016-11-15/21:58:24.183 CK-61900ORIENTATION += 'MWRATTITUDE AT 2016-11-16/16:58:26.183' CK-61900START += @2016-11-15/21:53:24.183 CK-61900STOP += @2016-11-16/23:12:24.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-11-16/23:07:24.183 CK-61900STOP += @2016-11-29/20:55:59.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2016-11-30/12:53:29.183' CK-61900START += @2016-11-29/20:50:59.183 CK-61900STOP += @2016-11-30/20:12:59.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-11-30/20:07:59.183 CK-61900STOP += @2016-12-13/19:53:36.183 CK-61900ORIENTATION += 'MWRATTITUDE AT 2016-12-14/14:54:24.183' CK-61900START += @2016-12-13/19:48:36.183 CK-61900STOP += @2016-12-14/21:07:36.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-12-14/21:02:36.183 CK-61900STOP += @2016-12-27/18:51:13.184 CK-61900ORIENTATION += 'MWRATTITUDE AT 2016-12-28/13:52:23.184' CK-61900START += @2016-12-27/18:46:13.184 CK-61900STOP += @2016-12-28/20:05:13.184 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2016-12-28/20:00:13.184 CK-61900STOP += @2017-01-10/19:03:15.184 CK-61900ORIENTATION += 'MWRATTITUDETILT14 AT 2017-01-11/14:04:48.184' CK-61900START += @2017-01-10/18:58:15.184 CK-61900STOP += @2017-01-11/16:47:15.184 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-01-11/16:42:15.184 CK-61900STOP += @2017-01-24/18:00:50.185 CK-61900ORIENTATION += 'MWRATTITUDE AT 2017-01-25/13:02:45.185' CK-61900START += @2017-01-24/17:55:50.185 CK-61900STOP += @2017-01-25/19:14:50.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-01-25/19:09:50.185 CK-61900STOP += @2017-02-07/16:58:25.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-02-08/08:55:55.185' CK-61900START += @2017-02-07/16:53:25.185 CK-61900STOP += @2017-02-08/16:15:25.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-02-08/16:10:25.185 CK-61900STOP += @2017-02-21/15:55:59.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-02-22/07:53:29.185' CK-61900START += @2017-02-21/15:50:59.185 CK-61900STOP += @2017-02-22/15:12:59.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-02-22/15:07:59.185 CK-61900STOP += @2017-03-07/14:16:22.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-03-08/06:13:52.185' CK-61900START += @2017-03-07/14:11:22.185 CK-61900STOP += @2017-03-08/11:33:22.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-03-08/11:28:22.185 CK-61900STOP += @2017-03-21/13:13:57.186 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-03-22/05:11:27.186' CK-61900START += @2017-03-21/13:08:57.186 CK-61900STOP += @2017-03-22/12:30:57.186 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-03-22/12:25:57.186 CK-61900STOP += @2017-04-04/12:11:31.186 CK-61900ORIENTATION += 'MWRATTITUDETILT14 AT 2017-04-05/07:15:16.186' CK-61900START += @2017-04-04/12:06:31.186 CK-61900STOP += @2017-04-05/13:25:31.186 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-04-05/13:20:31.186 CK-61900STOP += @2017-04-18/11:09:05.186 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-04-19/03:06:35.186' CK-61900START += @2017-04-18/11:04:05.186 CK-61900STOP += @2017-04-19/08:26:05.186 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-04-19/08:21:05.186 CK-61900STOP += @2017-05-02/11:21:04.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-05-03/03:18:34.185' CK-61900START += @2017-05-02/11:16:04.185 CK-61900STOP += @2017-05-03/08:38:04.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-05-03/08:33:04.185 CK-61900STOP += @2017-05-16/10:18:35.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-05-17/02:16:05.185' CK-61900START += @2017-05-16/10:13:35.185 CK-61900STOP += @2017-05-17/09:35:35.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-05-17/09:30:35.185 CK-61900STOP += @2017-05-30/09:16:07.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-05-31/01:13:37.185' CK-61900START += @2017-05-30/09:11:07.185 CK-61900STOP += @2017-05-31/08:33:07.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-05-31/08:28:07.185 CK-61900STOP += @2017-06-13/08:13:41.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-06-14/00:11:11.185' CK-61900START += @2017-06-13/08:08:41.185 CK-61900STOP += @2017-06-14/05:30:41.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-06-14/05:25:41.185 CK-61900STOP += @2017-06-27/08:44:18.184 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-06-28/00:41:48.184' CK-61900START += @2017-06-27/08:39:18.184 CK-61900STOP += @2017-06-28/06:01:18.184 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-06-28/05:56:18.184 CK-61900STOP += @2017-07-11/07:41:50.184 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-07-11/23:39:20.184' CK-61900START += @2017-07-11/07:36:50.184 CK-61900STOP += @2017-07-12/06:58:50.184 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-07-12/06:53:50.184 CK-61900STOP += @2017-07-25/06:39:24.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-07-25/22:36:54.183' CK-61900START += @2017-07-25/06:34:24.183 CK-61900STOP += @2017-07-26/05:56:24.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-07-26/05:51:24.183 CK-61900STOP += @2017-08-08/05:36:57.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-08-08/21:34:27.183' CK-61900START += @2017-08-08/05:31:57.183 CK-61900STOP += @2017-08-09/04:53:57.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-08-09/04:48:57.183 CK-61900STOP += @2017-08-22/05:11:45.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-08-22/21:09:15.183' CK-61900START += @2017-08-22/05:06:45.183 CK-61900STOP += @2017-08-23/04:28:45.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-08-23/04:23:45.183 CK-61900STOP += @2017-09-05/04:09:22.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-09-05/20:06:52.183' CK-61900START += @2017-09-05/04:04:22.183 CK-61900STOP += @2017-09-06/03:26:22.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-09-06/03:21:22.183 CK-61900STOP += @2017-09-19/03:06:59.182 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-09-19/19:04:29.182' CK-61900START += @2017-09-19/03:01:59.182 CK-61900STOP += @2017-09-20/00:23:59.182 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-09-20/00:18:59.182 CK-61900STOP += @2017-10-03/02:04:33.182 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-10-03/18:02:03.182' CK-61900START += @2017-10-03/01:59:33.182 CK-61900STOP += @2017-10-04/01:21:33.182 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-10-04/01:16:33.182 CK-61900STOP += @2017-10-17/01:39:21.182 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-10-17/17:36:51.182' CK-61900START += @2017-10-17/01:34:21.182 CK-61900STOP += @2017-10-18/00:56:21.182 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-10-18/00:51:21.182 CK-61900STOP += @2017-10-31/00:36:52.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-10-31/16:34:22.183' CK-61900START += @2017-10-31/00:31:52.183 CK-61900STOP += @2017-10-31/23:53:52.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-10-31/23:48:52.183 CK-61900STOP += @2017-11-13/23:34:23.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-11-14/15:31:53.183' CK-61900START += @2017-11-13/23:29:23.183 CK-61900STOP += @2017-11-14/22:51:23.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-11-14/22:46:23.183 CK-61900STOP += @2017-11-27/22:31:54.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-11-28/14:29:24.183' CK-61900START += @2017-11-27/22:26:54.183 CK-61900STOP += @2017-11-28/21:48:54.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-11-28/21:43:54.183 CK-61900STOP += @2017-12-11/22:06:31.183 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-12-12/14:04:01.183' CK-61900START += @2017-12-11/22:01:31.183 CK-61900STOP += @2017-12-12/21:23:31.183 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-12-12/21:18:31.183 CK-61900STOP += @2017-12-25/21:03:58.184 CK-61900ORIENTATION += 'EARTHPOINTED AT 2017-12-26/13:01:28.184' CK-61900START += @2017-12-25/20:58:58.184 CK-61900STOP += @2017-12-26/20:20:58.184 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2017-12-26/20:15:58.184 CK-61900STOP += @2018-01-08/20:01:28.184 CK-61900ORIENTATION += 'EARTHPOINTED AT 2018-01-09/11:58:58.184' CK-61900START += @2018-01-08/19:56:28.184 CK-61900STOP += @2018-01-09/19:18:28.184 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2018-01-09/19:13:28.184 CK-61900STOP += @2018-01-22/18:58:56.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2018-01-23/10:56:26.185' CK-61900START += @2018-01-22/18:53:56.185 CK-61900STOP += @2018-01-23/18:15:56.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2018-01-23/18:10:56.185 CK-61900STOP += @2018-02-05/17:56:25.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2018-02-06/09:53:55.185' CK-61900START += @2018-02-05/17:51:25.185 CK-61900STOP += @2018-02-06/18:56:25.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2018-02-06/18:51:25.185 CK-61900STOP += @2018-02-13/12:40:13.185 CK-61900ORIENTATION += 'DEORBITBURN AT 2018-02-13/15:07:43.185' CK-61900START += @2018-02-13/12:35:13.185 CK-61900STOP += @2018-02-13/17:40:13.185 CK-61900ORIENTATION += 'EARTHPOINTED' CK-61900START += @2018-02-13/17:35:13.185 CK-61900STOP += @2018-02-19/11:43:22.185 CK-61900ORIENTATION += 'EARTHPOINTED AT 2018-02-20/11:40:52.185' CK-61900START += @2018-02-19/11:38:22.185 CK-61900STOP += @2018-02-21/11:40:51 \begintext Appendix 2: Information for Rotation About Spin Axis Segment ============================================================= ******************************************************************************** MSOPCK SETUP FILE: juno_sc_nom_150326_180221_v01_spin.setup ******************************************************************************** Spin Orientation ----------------------------------------------------------------- The spin orientation segment contains the orientation data representing rotation of the JUNO_SPACECRAFT frame (frame ID -61000) about the JUNO_SPIN_AXIS frame (frame ID -61900) based on the attitude specification from Stuart Stephens' spreadsheet Juno_CK_Specs_for_150326_Ref_Traj_150408.xlsx: Spin Rate Start UTC End UTC Note --------- ----------------- ----------------- -------- 2 rpm 03/25/15 23:58:53 07/05/16 01:47:38 5 rpm 07/05/16 01:47:38 07/05/16 03:47:38 JOI Burn 2 rpm 07/05/16 03:47:38 10/19/16 17:11:07 5 rpm 10/19/16 17:11:07 10/19/16 19:11:07 PRM Burn 2 rpm 10/19/16 19:11:07 02/21/18 11:39:43 The profile above was converted to the following input provided to MSOPCK to make this segment (the columns are: start time, stop time, initial orientation as three angles set to zero, and angular velocity representing CCW rotation about +Z): 2015-03-26/00:00:01TDB 07/05/16-01:47:38 0 0 0 0 0 0.20943951023932 07/05/16-01:47:38 07/05/16-03:47:38 0 0 0 0 0 0.52359877559830 07/05/16-03:47:38 10/19/16-17:11:07 0 0 0 0 0 0.20943951023932 10/19/16-17:11:07 10/19/16-19:11:07 0 0 0 0 0 0.52359877559830 10/19/16-19:11:07 2018-02-21/11:40:51TDB 0 0 0 0 0 0.20943951023932 The following MSOPCK setup parameters were used to generate this segment: \begindata LSK_FILE_NAME = 'naif0011.tls' SCLK_FILE_NAME = 'JNO_SCLKSCET.00030.tsc' FRAMES_FILE_NAME = 'juno_v08.tf' INTERNAL_FILE_NAME = 'JUNO NOMINAL SPIN ATTITUDE, 03/26/15' CK_TYPE = 2 CK_SEGMENT_ID = 'JUNO NOMINAL SPIN ATTITUDE, 03/26/15' INSTRUMENT_ID = -61000 REFERENCE_FRAME_NAME = 'JUNO_SPIN_AXIS' ANGULAR_RATE_PRESENT = 'YES' INPUT_TIME_TYPE = 'UTC' INPUT_DATA_TYPE = 'EULER ANGLES' EULER_ANGLE_UNITS = 'RADIANS' EULER_ROTATIONS_ORDER = ( 'X' 'Y' 'Z' ) ANGULAR_RATE_FRAME = 'INSTRUMENT' PRODUCER_ID = 'NAIF/JPL' \begintext ******************************************************************************** RUN-TIME OBTAINED META INFORMATION: ******************************************************************************** PRODUCT_CREATION_TIME = 2015-04-09T16:36:49 START_TIME = 2015-03-25T23:58:53.814 STOP_TIME = 2018-02-21T11:39:42.814 ******************************************************************************** INTERPOLATION INTERVALS IN THE FILE SEGMENTS: ******************************************************************************** SEG.SUMMARY: ID -61000, COVERG: 2015-03-25T23:58:53.814 2018-02-21T11:39:42.814 -------------------------------------------------------------------------------- 2015-03-25T23:58:53.814 2018-02-21T11:39:42.814 ******************************************************************************** End of comments.