Galileo Jupiter Star Scanner Derived Bundle Readme ============================================================================== Brief Bundle Description ============================================================================== The Galileo star scanner is providing data on the instantaneous flux of 1.5 to 30 MeV electrons in the Jovian environment. It is able to measure fluxes of ~1 x 105 electrons cm-2 sec-1 or greater which generally means the data are usable inside of about 12 and rarely as far out as 16.5 Jovian Radii (RJ). Typically, the data points are spaced about 400 or 80 seconds apart with infrequent periods of more rapid data depending upon the operational mode. It should be noted that data are generally accurate in time to only within 20 seconds without special processing. Pitch angle information generally cannot be extracted from this bundle. Separate files exist for the Jovian insertion event (Orbit 0) and all subsequent perijove passes except Orbit 5 which occurred during a period of solar conjunction. Most data are stored in ASCII tables although some binary data are also included. 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. Bundle Organization: Galileo Jupiter Star Scanner Derived Data Collection (urn:nasa:pds:galileo-ssd-jup-derived:data) PDS4 documentation is all XML. There is an XML label for every product in the archive. Galileo Jupiter Star Scanner Derived Data Collection ============================================================================ This collection contains data on the instantaneous flux of 1.5 to 30 MeV electrons in the Jovian environment. It is able to measure fluxes of ~1 x 105 electrons cm-2 sec-1 or greater which generally means the data are usable inside of about 12 and rarely as far out as 16.5 Jovian Radii (RJ). These data were originally archived in the following PDS3 data sets: GO-J-SSD-5-DDR-STAR-SENSOR-V1.0 (https://doi.org/10.17189/1519686). ============================================================================== 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 raw 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 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 Orbit 4. 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 --> Num Start Periapsis Range Local Apoapsis Range Local Date Date/Time Time Date Time --------------------------------------------------------------------- 0 95-12-03 95-12-07 21:54 4.00 16:21 96-03-29 267.7 03:39 1 96-06-23 96-06-28 00:31 11.03 15:36 96-08-09 125.3 03:24 2 96-09-01 96-09-07 13:38 10.65 15:22 96-10-07 113.0 03:12 3 96-11-02 96-11-06 13:31 9.21 15:34 96-11-27 89.1 03:28 4 96-12-15 96-12-19 03:22 9.16 15:21 97-01-04 72.1 03:00 5* 97-01-15 97-01-20 00:26 9.05 14:54 97-02-04 72.1 02:48 6 97-02-16 97-02-20 20:55 9.12 14:28 97-03-14 89.2 02:20 7 97-03-30 97-04-04 11:03 9.12 14:14 97-04-21 75.9 01:56 8 97-05-04 97-05-08 11:42 9.27 13:29 97-06-02 100.2 01:21 9 97-06-22 97-06-27 11:52 10.77 12:35 97-08-08 143.0 00:21 10 97-09-14 97-09-18 23:10 9.17 12:44 97-10-13 98.9 00:36 11 97-11-02 97-11-06 23:02 9.03 12:36 97-11-26 84.1 00:29 12 97-12-15 97-12-16 06:35 8.80 12:29 97-12-20 46.6 00:37 13* 98-02-09 98-02-10 23:09 8.85 12:33 98-03-06 95.2 00:25 14 98-03-28 98-03-29 07:59 8.83 12:17 98-04-30 199.7 00:16 15 98-05-30 98-06-01 02:34 8.85 12:12 98-06-26 100.4 00:03 16 98-07-20 98-07-20 17:18 9.93 11:54 98-08-23 124.4 23:51 17 98-09-25 98-09-26 08:26 8.91 11:44 98-10-24 110.4 23:34 18 98-11-21 98-11-22 03:57 9.23 11:24 98-12-27 129.0 23:17 19 99-01-31 99-02-01 02:38 9.24 10:56 99-03-18 154.3 22:40 20 99-05-02 99-05-03 17:00 9.37 10:24 99-06-02 114.5 21:46 21 99-06-29 99-07-02 05:04 7.27 10:04 99-07-22 89.0 21:57 22 99-08-11 99-08-12 10:58 7.32 09:50 99-08-29 77.1 21:23 23 99-09-13 99-09-14 19:57 6.55 09:17 99-09-27 65.7 20:46 24 99-10-10 99-10-11 03:31 5.68 08:41 99-11-01 97.7 20:47 25 99-11-25 99-11-26 23:30 5.94 08:39 99-12-15 87.2 20:28 26 00-01-01 00-01-04 03:33 5.78 08:14 00-01-28 102.7 20:05 27 00-02-20 00-02-22 12:30 5.85 07:56 00-04-06 154.4 19:55 28 00-05-17 00-05-21 04:52 6.68 07:18 00-09-08 289.9 18:37 29 00-12-27 00-12-29 03:26 7.49 06:03 01-03-11 216.3 17:37 30 01-05-07 01-05-23 17:33 7.28 05:11 01-06-29 136.8 16:27 31 01-08-04 01-08-06 04:52 5.93 04:14 01-09-10 132.2 16:05 32 01-10-14 01-10-15 23:56 5.78 03:53 01-12-01 160.7 15:39 33 02-01-16 02-01-17 16:23 5.54 03:13 02-06-13 348.1 14:21 34 02-11-04 02-11-05 07:23 1.99 01:40 03-04-14 336.7 12:49 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 ============================================================================ Contacts ============================================================================ For questions or problems regarding this archive, please contact the PDS/PPI PDS operator: Email pds_operator@igpp.ucla.edu