Galileo Orbiter at Jupiter Trajectory Data Readme Introduction ============ This document contains information pertaining to the Galileo Orbiter at Jupiter Trajectory Data Bundle. All data are stored in ASCII tables. All files give time values in Spacecraft Event Time (SCET). Some files may give an additional time column that contains the Earth Received Time (ERT) in addition to the SCET. Users of these data are encouraged to acknowledge both the PDS and the principal investigators of the instruments whose data is used in analysis in all publications. This bundle is organized into 4 collections, including: Galileo Jupiter Moon Trajectory Data Collection (urn:nasa:pds:galileo-traj-jup:data-moon-traj), Galileo Jupiter Trajectory Rotor Attitude Data Collection (urn:nasa:pds:galileo-traj-jup:data-rotor-attitude), Galileo Trajectory Jupiter Centered Coordinates Data Collection (urn:nasa:pds:galileo-traj-jup:data-sc-traj-jup-coords), Galileo Jupiter Trajectory Moon Centered Coordinates Data Collection (urn:nasa:pds:galileo-traj-jup:data-sc-traj-moon-coords). PDS4 documentation is all XML. There is an XML label for every product in the archive. Galileo Jupiter Moon Trajectory Data Collection ============================================================================ This collection contains data for System III (1965.0) trajectory and Sun and Earth phase angles of Galileo and selected Jovian moons when Galileo was inside 30 Jupiter radii from Jupiter. Trajectories are sampled every 20 seconds. Galileo Jupiter Trajectory Rotor Attitude Data Collection ============================================================================ This collection contains the attitude data for the rotor of the Galileo spacecraft. The data provided are derived from the Attitude and Articulation Control System (AACS) data downlink as provided by the Galileo project to the magnetometer team. This collection covers portions of the Jupiter Approach (JA) and all orbit operation mission phases (J0-J35). Galileo Trajectory Jupiter Centered Coordinates Data Collection ============================================================================ This collection contains Galileo trajectory data in various Jupiter centered coordinate systems (System III 1965.0, Jupiter Solar Equatorial, Jupiter Solar Magnetospheric) for all orbit operation mission phases. Galileo Jupiter Trajectory Moon Centered Coordinates Data Collection ============================================================================ This collection contains Galileo trajectory data in moon (Amalthea, Io, Europa, Ganymede, Callisto) centered coordinates for all of the near satellite encounters. Ephemeris data are provided every two seconds for approximately one hour about closest approach. These data were originally archived in the following PDS3 data sets: GO-J-POS-6-MOON-TRAJ-JUP-COORDS-V1.0 (https://doi.org/10.17189/1519674), GO-J-POS-6-REDR-ROTOR-ATTITUDE-V1.0 (https://doi.org/10.17189/1519675), GO-J-POS-6-SC-TRAJ-JUP-COORDS-V1.0 (https://doi.org/10.17189/1519676), GO-J-POS-6-SC-TRAJ-MOON-COORDS-V1.0 (https://doi.org/10.17189/1519677). ============================================================================ Mission Facts ============================================================================ The Galileo spacecraft and some science instruments were reprogrammed after arrival at Jupiter so that data acquisition and downlink could be achieved at the low bit rates associated with the mission after the high gain antenna (HGA) anomaly. New software was telemetered to the spacecraft in early May 1996 in a period known as the 'Inflight Load' or IFL. The mission prior to the IFL is known as the Phase 1 mission. After the IFL the mission is referred to as the Phase 2 mission. In Phase 1 raw data were provided to the instrument teams in Experiment Data Record (EDR) format. In Phase 2, the whole telemetry stream and ground data system were changed. The raw data were 'packetized' and delivered electronically as packet files or instrument packet files (IPF). The difference between a packet file and an IPF is a single 44 byte header called an SFDU. The Io data stored on this Bundle were acquired during Phase 1 and downlinked after the IFL by use of the new capabilities of the Phase 2 flight software. As such, they are a hybrid form of data that were acquired by using flight software that may differ from other files of the same raw data format. This is primarily of concern when instrument reprogramming has resulted in a change in the contents of the raw data (i.e. MAG).The data are derived from SPICE SP kernels which are archived at the NAIF Node of the PDS. The Galileo orbits were named by concatenating the first letter of the name of the primary target in each orbit with the orbit number. Thus, the fourth Jupiter orbit, in which Europa is the primary target, is called E4. The project defined orbits according to spacecraft command load boundaries rather than the normal convention of apoapsis to apoapsis. The navigation team did not always adhere to this convention, causing some confusion. The PDS has organized the data and data delivery schedules around the project defined orbit boundaries. The following tables contain information about the orbital tour and satellite encounters: --------------------------------------------------------------------- Galileo Orbit Information --------------------------------------------------------------------- Orbit Orbit <--- Periapsis Info ----> <-- Apoapsis Info --> Name Start Periapsis Range Local Apoapsis Range Local Date Date/Time Time Date Time --------------------------------------------------------------------- Jupiter 0 95-12-03 95-12-07 21:54 4.00 16:21 96-03-29 267.7 03:39 Ganymede 1 96-06-23 96-06-28 00:31 11.03 15:36 96-08-09 125.3 03:24 Ganymede 2 96-09-01 96-09-07 13:38 10.65 15:22 96-10-07 113.0 03:12 Callisto 3 96-11-02 96-11-06 13:31 9.21 15:34 96-11-27 89.1 03:28 Europa 4 96-12-15 96-12-19 03:22 9.16 15:21 97-01-04 72.1 03:00 Jupiter 5* 97-01-15 97-01-20 00:26 9.05 14:54 97-02-04 72.1 02:48 Europa 6 97-02-16 97-02-20 20:55 9.12 14:28 97-03-14 89.2 02:20 Ganymede 7 97-03-30 97-04-04 11:03 9.12 14:14 97-04-21 75.9 01:56 Ganymede 8 97-05-04 97-05-08 11:42 9.27 13:29 97-06-02 100.2 01:21 Callisto 9 97-06-22 97-06-27 11:52 10.77 12:35 97-08-08 143.0 00:21 Callisto 10 97-09-14 97-09-18 23:10 9.17 12:44 97-10-13 98.9 00:36 Europa 11 97-11-02 97-11-06 23:02 9.03 12:36 97-11-26 84.1 00:29 Europa 12 97-12-15 97-12-16 06:35 8.80 12:29 97-12-20 46.6 00:37 Jupiter 13* 98-02-09 98-02-10 23:09 8.85 12:33 98-03-06 95.2 00:25 Europa 14 98-03-28 98-03-29 07:59 8.83 12:17 98-04-30 199.7 00:16 Europa 15 98-05-30 98-06-01 02:34 8.85 12:12 98-06-26 100.4 00:03 Europa 16 98-07-20 98-07-20 17:18 9.93 11:54 98-08-23 124.4 23:51 Europa 17 98-09-25 98-09-26 08:26 8.91 11:44 98-10-24 110.4 23:34 Europa 18 98-11-21 98-11-22 03:57 9.23 11:24 98-12-27 129.0 23:17 Europa 19 99-01-31 99-02-01 02:38 9.24 10:56 99-03-18 154.3 22:40 Callisto 20 99-05-02 99-05-03 17:00 9.37 10:24 99-06-02 114.5 21:46 Callisto 21 99-06-29 99-07-02 05:04 7.27 10:04 99-07-22 89.0 21:57 Callisto 22 99-08-11 99-08-12 10:58 7.32 09:50 99-08-29 77.1 21:23 Callisto 23 99-09-13 99-09-14 19:57 6.55 09:17 99-09-27 65.7 20:46 Io 24 99-10-10 99-10-11 03:31 5.68 08:41 99-11-01 97.7 20:47 Io 25 99-11-25 99-11-26 23:30 5.94 08:39 99-12-15 87.2 20:28 Europa 26 00-01-01 00-01-04 03:33 5.78 08:14 00-01-28 102.7 20:05 Io 27 00-02-20 00-02-22 12:30 5.85 07:56 00-04-06 154.4 19:55 Ganymede 28 00-05-17 00-05-21 04:52 6.68 07:18 00-09-08 289.9 18:37 Ganymede 29 00-12-27 00-12-29 03:26 7.49 06:03 01-03-11 216.3 17:37 Callisto 30 01-05-07 01-05-23 17:33 7.28 05:11 01-06-29 136.8 16:27 Io 31 01-08-04 01-08-06 04:52 5.93 04:14 01-09-10 132.2 16:05 Io 32 01-10-14 01-10-15 23:56 5.78 03:53 01-12-01 160.7 15:39 Io 33 02-01-16 02-01-17 16:23 5.54 03:13 02-06-13 348.1 14:21 Amalthea 34 02-11-04 02-11-05 07:23 1.99 01:40 03-04-14 336.7 12:49 Jupiter 35 03-09-21 03-09-21 18: 1.00 * Solar Conjunction - no data from this orbit ** Rj = 71492 km ------------------------------------------------------------ Satellite Flyby Characteristics* ------------------------------------------------------------ Satellite Planetocentric Coords Range Lat E Lon Orb Moon C/A Time (Rm**) (deg) (deg) Note ------------------------------------------------------------ 0 IO 95-12-07 17:45:58 1.50 -9.6 258.9 W 24 IO 99-10-11 04:33:03 1.34 4.5 135.9 U 27 IO 00-02-22 13:46:41 1.11 18.5 157.4 U 31 IO 01-08-06 04:59:21 1.11 77.5 187.7 P 32 IO 01-10-16 01:23:21 1.10 -78.5 135.3 P 33 IO 02-01-17 14:08:28 1.06 -43.5 41.8 F 4 EUR 96-12-19 06:52:58 1.45 -1.7 322.4 F 6 EUR 97-02-20 17:06:10 1.38 -17.0 34.7 F 11 EUR 97-11-06 20:31:44 2.31 25.7 218.7 F 12 EUR 97-12-16 12:03:20 1.13 -8.7 134.4 U 14 EUR 98-03-29 13:21:05 2.06 12.2 131.2 U 15 EUR 98-05-31 21:12:57 2.62 15.0 225.4 W 19 EUR 99-02-01 02:19:50 1.93 30.5 28.1 U 26 EUR 00-01-03 17:59:43 1.22 -47.1 83.4 U 1 GAN 96-06-27 06:29:07 1.32 30.4 246.7 W 2 GAN 96-09-06 18:59:34 1.10 79.3 236.4 P 7 GAN 97-04-05 07:09:58 2.18 55.8 270.4 W 8 GAN 97-05-07 15:56:10 1.61 28.3 84.8 U 28 GAN 00-05-20 10:10:10 1.31 -19.0 92.4 U 29 GAN 00-12-28 08:25:27 1.89 62.2 269.0 P 3 CALL 96-11-04 13:34:28 1.47 13.2 282.3 W 9 CALL 97-06-25 13:47:50 1.17 2.0 101.0 U 10 CALL 97-09-17 00:18:55 1.22 4.6 281.3 W 30 CALL 01-05-25 11:23:58 1.06 13.6 254.6 W 34 AMA 02-11-05 06:18:40 2.89 -47.7 74.8 U * Satellite encounters with recorded data only J2000 reference, body fixed spherical coordinates. ** Moon Rm (km) ======================= Amalthea 86.2 Io 1818 Europa 1560 Ganymede 2634 Callisto 2409 Notes: Negative latitudes are southern hemisphere, U = upstream F = flank W = wake P = polar Errata ====== An errata file has been included. If more issues are discovered, they will be noted in this file. Every effort has been made to insure that the data are of the best quality available. However, users are encouraged to verify the correctness of the data prior to submitting any publications or other work based on these data and report any issues to PDS/PPI. ============================================================================ Contacts ============================================================================ For questions or problems regarding this archive, please contact the PDS/PPI PDS operator: Email pds_operator@igpp.ucla.edu