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GO JUP HIC HIGHRES ENERGETIC ION COUNT RATE V1.0 (PDS)

NSSDCA ID: PSFP-00291

Availability: Archived at NSSDC, accessible from elsewhere

Description

This description was generated automatically using input from the Planetary Data System. Overview: ========= This data set provides energetic (MeV) ion count rates and events measured by the Heavy Ion Counter (HIC) instrument on the Galileo spacecraft. These data are derived from high time resolution raw data that were recorded to tape and then played back later in the orbit. There are two basic types of data files associated with the full-rate reduced data: Detector Count Rates and Events (Pulse Heights). Both types of files set are stored as ASCII tables, where the file parameters are functions of time. Appropriate information concerning the operation of the instrument can be found in Garrard, Gehrels and Stone, Space Sci. Rev., 60, 305, 1992 [GARRARDETAL1992]. This data set is highly discontinuous in time. Because of the severe limitations in the downlink capability of the Galileo spacecraft, LPW rate data were recorded only for targeted observations. Most of these data were acquired near the Galilean moons, although selected observations were made in various locations around the magnetosphere. Table 1 below provides a listing of the start and stop times of the recorded data segments, organized according to. where the data were acquired. ----------------------------------------------------------------Table 1. LPW Resolution Data Coverage** ----------------------------------------------------------------Io Flybys: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------I00 IO 95-12-07 15:21 184 5.4- 7.7 10.6-12.3 204-290 I24 IO 99-10-11 03:42 66 5.7- 6.0 10.1-10.9 59- 87 2 I25 IO N/A 1 I27 IO 00-02-22 13:04 81 5.9- 6.0 8.4- 9.4 64- 97 I31 IO 01-08-06 04:25 64 5.9 3.9- 4.7 145-171 I32 IO 01-10-16 01:06 73 5.9- 6.1 4.8- 5.7 253-283 I33 IO N/A 1 Europa Flybys: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID* Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------E04 EUR 96-12-19 06:33 51 9.4- 9.5 16.6-16.9 147-173 E06 EUR 97-02-20 16:37 312 9.5- 9.1 12.8-14.8 326-125 E11 EUR 97-11-06 20:09 162 9.0- 9.4 10.8-11.9 211-294 E12 EUR 97-12-16 11:42 46 9.4- 9.6 14.5-14.8 107-131 E14 EUR 98-03-29 13:05 55 9.4- 9.6 14.3-14.7 176-204 E15 EUR 98-05-31 20:42 61 9.4- 9.6 9.9-10.3 277-308 E16 EUR N/A 1 E18 EUR N/A 1 E19 EUR 99-02-01 01:49 50 9.2- 9.4 9.7-10.0 245-270 E26 EUR 00-01-03 17:29 61 9.2- 9.7 2.8- 3.1 346- 18 Ganymede Flybys: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------G01 GAN 96-06-27 06:07 45 14.9-15.2 11.2-11.3 163-188 G02 GAN 96-09-06 18:32 56 14.8-15.2 10.7-10.9 143-174 G07 GAN 97-04-05 06:44 56 14.8-15.2 19.7-19.8 5- 37 G08 GAN 97-05-07 15:36 46 14.8-15.1 8.1- 8.2 276-302 G28 GAN 00-05-20 09:40 60 14.7-15.3 0.7- 0.8 335- 9 G29 GAN 00-12-28 07:57 57 14.7-15.2 23.9- 0.0 205-237 Callisto Flybys: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------C03 CALL 96-11-04 13:15 45 26.1-26.4 7.8 231-258 C09 CALL 97-06-25 13:25 46 26.1-26.4 5.5 47- 74 C10 CALL 97-09-16 23:49 60 26.0-26.4 5.0- 5.1 318-354 C30 CALL 01-05-25 11:09 36 26.2-26.5 13.1-13.2 68- 89 Amalthea Flyby: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------34 AMA 02-11-05 02:44 231 6.2- 2.3 6.4- 3.0 102-149 Inner Magnetosphere: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------J00 PJOV 95-12-07 23:22 124 4.0- 5.2 18.4-20.5 18- 62 I24 TOR N/A 1 I32 TOR 01-10-15 22:55 33 5.8- 5.9 3.0- 3.4 198-211 I25 TOR 99-11-25 21:07 174 5.9- 7.0 5.1- 7.0 336- 53 2 A34 PSX7 02-11-05 01:05 90 6.3- 7.7 17.7-18.2 24- 70 C23 PJOV 99-09-14 14:36 412 6.5- 7.7 6.1-10.3 52-239 C21 PJOV 99-07-01 23:53 113 7.6- 8.2 7.4- 8.3 247-301 C22 PJOV 99-08-12 08:18 288 7.3- 7.6 8.4-11.0 225- 0 E11 EQX (see E11 EUR) 3 I32 RAMP 01-10-15 15:31 115 7.8-8.9 22.9-23.7 354- 52 C10 EQX 97-09-18 22:34 46 9.2 12.5-12.8 102-125 C20 PJOV 99-05-03 15:59 122 9.4 10.0-10.8 45-106 A34 PSX6 02-11-04 21:48 45 10.3 17.0-17.1 285-300 Middle Magnetosphere: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------C09 TAR 97-06-28 13:50 61 18.1-18.5 18.1-18.2 324-359 C03 TAR 96-11-05 07:04 40 19.3-19.0 8.9- 9.0 140-163 G08 QRS 97-05-06 13:00 129 25.0-25.8 5.9- 6.0 63-140 G01 PSX 96-06-30 02:00 46 27.2-27.5 22.8 292-319 A34 PSX2 02-11-03 15:28 45 29.4-29.0 15.6 276-303 A34 PSX1 02-11-03 10:38 45 31.8-31.4 15.5 102-132 G02 PSX 96-09-11 02:38 40 39.2-39.4 23.8-23.9 121-145 G07 PSX 97-03-30 18:49 46 46.2-46.4 4.8 125-152 Magnetotail: ----------------------------------------------------------------Dur. Jup Range Local Time S3 WLON Obs. ID Start Time (min) (Rj) (hours) (deg). Note ----------------------------------------------------------------C09 DSK1 97-07-04 14:09 118 64 22.1 99-170 C09 DSK2 97-07-14 10:03 45 107 23.2 357- 25 E18 DSK 98-12-10 19:36 288 109 22.5 285- 98 C09 DSK3 97-07-23 13:11 46 129 23.7 18- 45 C09 DAWN 97-08-23 14:07 122 130 0.9- 1.0 17- 90 C09 APJ 97-08-07 11:06 101 143 0.3 30- 91 * The ID element is derived from the SEF identifier for the recorded observation. The recording identifiers translate to: IO, GAN, EUR, CALL - satellites PSX - plasma sheet crossing TAR - trans-auroral region QRS - quarter rotation survey DSK - dusk side of orbit (see local time) DAWN - dawn side of orbit (see local time) APJ - apojove TOR - Io torus EQX - magnetic equator crossing PJOV - perijove RAMP - outer torus These designations were defined by the sequence team. ** LPW coverage indicates time periods that were recorded in LPW format. Not all HIC data files span entire recorded interval. Notes: 1 = Recording lost due to spacecraft safing/anomaly 2 = Stats given for primary observation interval only, data file. includes additional intervals of 'ridealong' data. 3 = E11 EUR and EQU are continuous and listed as a single observation. Table 2 provides a listing of the various satellite closest approach times and the location of the spacecraft, relative to the satellite at these times. -----------------------------------------------------------Table 2. 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 ** 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 Processing: =========== The data are processed from the level 2 data obtained from the Query Server at JPL. The rate files are a level 3 product where the instrument counting rates have been converted into units of counts/second and are given at full time resolution. The event files are a level 3 product where the event data has been extracted from the data stream, a nuclear charge (Z) of each event has been calculated along with the appropriate livetime and geometry factor. The energy deposited in each of three detectors is also given in MeV. Every 2 seconds the HIC instrument zeros the rate counters and begins accumulation. One event per minor frame is selected (based on a priority scheme) and transmitted to the spacecraft along with 2 - 3 rates. Some of the less important / scientifically interesting rates are subcommutated and thus only transmitted once every 16 HIC packets (1 HIC packet equals 3 minor frames equals 2 seconds). The data, with 2 second time resolution, consists of (up to) 3 events and 8 rates. The different rates respond to different energy ranges. These are given in MeV/nucleon (for oxygen) below: Rate Energy Range (MeV/nuc for oxygen) ---------------------------------------------------------single LET E rates LE1 15.1 - 25.3 LE2 14.9 - 176.0 LE3 15.4 - 192.0 LE4 17.9 - 177.0 LE5 44.8 - 185.0 coincidence LET E rates DUBL 17.0 - 18.0 TRPL 18.0 - 24.0 WDSTP 30.0 - 48.0 WDPEN 48.0 - 185.0 single LET B rates LB1 1.9 - 5000.0 LB2 1.9 - 7000.0 LB3 2.1 - 13000.0 LB4 16.6 - 95000.0 coincidence LET B rates LETB 4.8 - 17.5 The rate data can be converted to fluxes using the geometry factors given in the technical document included on this CD. Each event transmitted is tagged according to its event type. The corresponding event numbers are given below. Set of Event TYPEs -----------------20 LETB Single 21 LETB Double 22 LETB Triple 23 LETE Double 24 LETE Triple 25 LETE WDSTP 26 LETE WDSTPL1 27 LETE WDPEN 28 LETE WDPENL1 It was determined that at times the LETB sensor was mistagging events. A check was implemented in the ground event processing to determine the correct tag for a given event based on the returned pulse heights. An extended set of event types (given below) were created to indicate those events which were originally mistagged. For these events no Z (nuclear charge) or livetime value is determined. It is possible to group the events, based on the pulse heights, into 3 basic compositional categories (S, Na or S, and O or Na or S). Extended Set of Event TYPEs --------------------------(Occasionally LETB events are mistagged. By examining the pulse heights the events can be reclassified. ---------------------------------------------------------------30 = was a LETB single, now is a O/Na/S LETB single 31 = was a LETB single, now is a Na/S LETB single 32 = was a LETB single, now is a S LETB single 33 = was a LETB double, now is a O/Na/S LETB single 34 = was a LETB double, now is a Na/S LETB single 35 = was a LETB double, now is a S LETB single 36 = was a LETB triple, now is a O/Na/S LETB single 37 = was a LETB triple, now is a Na/S LETB single 38 = was a LETB triple, now is a S LETB single 40 = was a LETB single, now is a LETB double 41 = N/A 42 = was a LETB triple, now is a LETB double 50 = was a LETB single, now is a LETB triple 51 = was a LETB double, now is a LETB triple 52 = N/A Ancillary Data: =============== There are no ancillary data uniquely associated with the HIC reduced data archive. However, the spacecraft trajectory and attitude data, and the As-run Spacecraft Events Files that are provided on the same archive volume as these data are useful ancillary products for users of the HIC data. Coordinate System: ================== These are scalar data. Software: ========= There is no software provided with this archive. Media/Format: ============= Event Data: ----------The Event data are stored as a simple ASCII data table. The first 18 lines of the original data file consisted of a header that has been moved to the PDS label (file and data info sections). The header contains summary information describing the 12 columns of data. The summary includes: - Count of adjustments by event type Occasionally portions of data required for processing at this level is missing from instrument records. In these cases a default 'livetime' value has been supplied. The number of times this 'adjustment' was performed is reported by event type. - Count of events by event type Event TYPE values that fall within the set (see below for explanation of the set) of expected values are counted. The accumulated count of these events are reported here by event type. - Number of bad event types Only certain values are expected in the TYPE field. Event TYPE values falling outside the set of expected values are counted. The accumulated count of these events are reported here. Each data line consists of a PDS date/time string, an spacecraft clock (SLK) counter string and 10 numeric fields. These fields are all floating point with the exception of the 'DateTime', 'SCLK' and 'TYPE' columns. The data are contained in ASCII format. The columns are in the following order: Column Heading Contents Format Example ------- -------- ------ ------DateTime Spacecraft Event Time (SCET) in UTC, derived from PB (Playback) level0 telemetry header data format: %4d-%02d-%02dT%02s:%02d:%06.3f example: 1995-12-07T15:30:08.439Z SCLK Spacecraft clock from %07ld:%02ld:0:0 3497588:00:0:0 raw telemetry header TYPE Telescope ID with which the %2d 23 event is associated. For set of values and definitions, see below. e1 Energy (MeV) deposited in %8.2f 15.63 the e1 detector e2 Energy (MeV) deposited in %8.2f 15.63 the e2 detector e3 Energy (MeV) deposited in %8.2f 15.63 the e3 detector <z> Estimated nuclear charge %8.2f 7.52 of particle. Note: incomplete or no data 99.90 is indicated by the special value of 99.90 dz Difference of 2 calculations %8.2f 0.54 of nuclear charge; indicates approximate error in <z>. Eavg Rough estimate of incident %10.4f 122.1000 energy of particle. SCTHavg Rough estimate of secant of %10.4f 122.1000 of incident angle of particle. livetime livetime (in seconds) %11.4 0.5333 appropriate for the event; calculated from the ratio of rates to telemetered events. gf Geometry factor appropriate %8.4 0.4293 for the event type. The logic conditions and approximate energy ranges for the other rates are given below. Rate Logic Energy Range (MeV/nuc for oxygen) ----------------------------------------------------------------------DUBL LE1.LE2.LE3* 17.0 - 18.0 TRPL LE1.LE2.LE3.LE4* 18.0 - 24.0 WDSTP LE2.LE3.LE4.LE5* 30.0 - 48.0 WDSTPL1 LE1.LE2.LE3.LE4.LE5* 30.0 - 48.0 (has smaller geometry factor than WDSTP) WDPEN LE2.LE3.LE4.LE5 48.0 - 185.0 WDPENL1 LE1.LE2.LE3.LE4.LE5 48.0 - 185.0 (has smaller geometry factor than WDPEN) LETB (20) LB1.LB4* 2.4 - 17.5 LETB (21) LB1.LB2.LB4* 4.8 - 17.5 LETB (22) LB1.LB2.LB3.LB4* 6.5 - 17.5 X.Y = logical AND of X and Y X* = logical NOT X Pulse height energies are returned for only 3 detectors, which 3 depends on the event type: Event Type PHA3 detector PHA2 detector PHA1 detector ----------------------------------------------------------------------DUBL ----- LE1 LE2 TRPL LE3 LE1 LE2 WDSTP and WDSTPL1 LE3 LE4 LE2 WDPEN LE3 LE4+LE5 LE2 LETB LB3 LB2 LB1 Event types (and extended types) are described above in the Data Processing section. Rate Data: ---------The Rate data are stored as a simple ASCII data table. The first 4 lines of the original data file consisted of a header that has been moved to the PDS label (file and data info sections). The header contains summary column headings for the 17 columns of data plus some summary data. The summary typically consists of a descriptor and an identifier in the form: xxx: yyy where xxx is a single word descriptor and yyy is an identifier. Examples: TYPE: PB2R DATE: 96/02/25 Each line consists of a date/time string and 16 numeric fields. These fields are all floating point with the exception of the ''DateTime'' and ''COM SUB STAT'' columns. Column Heading Contents Format Example ------- -------- ------ ------DateTime Spacecraft Event Time (SCET) in UTC, Derived from PB (Playback) level0 telemetry header data format: %4d-%02d-%02dT%02s:%02d:%06.2f example: 1994-05-22T17:23:56.123Z SCLK Spacecraft clock derived %07ld:%02ld:0:0 3497588:00:0:0 from PB (Playback) level0 telemetry header data SCET COM SUB STAT Sub-commutated status value. %2d 11 The output facilities are shared by the rate types LE2 through LE5 and LB1 through LB4. -1 is a flag value (the last 8 columns have no-data). Rates Per The valid values are in counts 1604.50 Second per second. A no-data value -99.0 is shown as a negative number. DUBL Rates of respective types %7.2f 1234.00 TRPL from the LET E sensor (see WDSTP below). WDPEN LETB Count rate of LETB %8.2f 30528.00 LE1 Count rate of LE1 %8.2f 30528.00 LE2 Count rate of LE2 %8.2f 30528.00 LE3 Count rate of LE3 %8.2f 30528.00 LE4 Count rate of LE4 %8.2f 30528.00 LE5 Count rate of LE5 %8.2f 30528.00 LB1 Count rate of LB1 %8.2f 30528.00 LB2 Count rate of LB2 %8.2f 30528.00 LB3 Count rate of LB3 %8.2f 30528.00 LB4 Count rate of LB4 %8.2f 30528.00 Explanation of Rates: --------------------The LET E logic conditions and approximate energy ranges for the other rates are given below. Rate Logic Energy Range (MeV/nuc for oxygen) -----------------------------------------------------------------DUBL LE1.LE2.LE3* 17.0 - 18.0 TRPL LE1.LE2.LE3.LE4* 18.0 - 24.0 WDSTP LE2.LE3.LE4.LE5* 30.0 - 48.0 WDPEN LE2.LE3.LE4.LE5 48.0 - 185.0 LETB LB1.LB2.LB4* 4.8 - 17.5 X.Y = logical AND of X and Y X* = logical NOT X LE1, LE2, LE3, LE4, LE5, LB1, LB2, LB3 and LB4 are single detector rates which respond in the approximate energy ranges given below. Rate Energy Range (MeV/nuc for oxygen) ----------------------------------------------------LE1 15.1 - 25.3 LE2 14.9 - 176.0 LE3 15.4 - 192.0 LE4 17.9 - 177.0 LE5 44.8 - 185.0 LB1 1.9 - 5000.0 LB2 1.9 - 7000.0 LB3 2.1 - 13000.0 LB4 16.6 - 95000.0

Alternate Names

  • GO-J-HIC-3-RDR-HIGHRES-COUNTRATE-V1.0

Discipline

  • Planetary Science: Fields and Particles

Additional Information

Spacecraft

Experiments

Questions and comments about this data collection can be directed to: Dr. Edwin V. Bell, II

 

Personnel

NameRoleOriginal AffiliationE-mail
Prof. Edward C. Stone, Jr.Data ProviderCalifornia Institute of Technologyecs@srl.caltech.edu
Dr. Christina CohenGeneral ContactCalifornia Institute of Technologycohen@srl.caltech.edu
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