GALD.CAT REVISION HISTORY ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- CHANGES BELOW THIS LINE REFER TO GALD.CAT, REVIEWED 3/6/96 ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- 1/19/99 Added: LABEL_REVISION_NOTE = " 1995 Final data deliveries (through 1992) to PDS SBN by DDS Science Team (E. Gruen, MPI Heidelberg) 01 Jan 1996 Creation of V1.0 by M. Sykes (SBN) 06 Mar 1996 PDS SBN Peer Review (Tucson, Arizona) 1999 Final data updates and new data deliveries (through 1997) to PDS SBN by DDS Science Team (H. Krueger, MPI Heidelberg) Jan 1999 Upgrades and corrections for V2.0 by M. Sykes (SBN) 08 Mar 1999 PDS SBN Peer Review (Heidelberg, Germany)" ---------------------------------------------------------------------------- 12/03/98 DATA_SET_ID = "GO-D-GDDS-5-DUST-V1.0" -> "GO-D-GDDS-5-DUST-V2.0" ---------------------------------------------------------------------------- 12/03/98 DATA_SET_NAME = "GALILEO DUST DETECTOR SYSTEM V1.0" -> "GALILEO DUST DETECTION SYSTEM V2.0" ---------------------------------------------------------------------------- 12/03/98 Changed START_TIME from 1989-12-31T10:08 to 1989-12-28T17:20 (the event data begins earlier than the impact data) ---------------------------------------------------------------------------- 01/20/99 Changed STOP_TIME from 1992-12-28T15:47 to 1997-12-20T03:10 (the noise data ends later than the impact data) ---------------------------------------------------------------------------- 12/03/98 Changed DATA_SET_RELEASE_DATE from 1996-03-06 to 1998-11-06 ---------------------------------------------------------------------------- 03/25/99 In Dataset Overview, "The data presented with this dataset includes" is changed to "This data set contains information on dust the dust environment in interplanetary space within the inner solar system and in the Jupiter system, within and without the Jovian magnetosphere and around the Galilean satellites. This information is collected with a dust impact experiment, DDS, from which may be inferred direction of motion, mass, velocity and charge (see GALDINST.CAT). The data presented in this dataset include instrumental readouts, inferred metadata, calibration information and a calendar of events. Specifically: " ---------------------------------------------------------------------------- 12/03/98 Included galdevnt.tab and galdstat.tab in Dataset Overview section and renumbered included datasets accordingly. ---------------------------------------------------------------------------- 12/04/98 In Dataset Overview, "[GRUNETAL1995B]" is changed to "(Gruen et al., 1995b and Krueger et al., 1999b)" ---------------------------------------------------------------------------- 12/04/98 In Dataset Overview, in the description of galdarea.tab, "speed" is changed to "velocity". ---------------------------------------------------------------------------- 12/04/98 In Dataset Overview, the elements of the list introduced by a colon are separated by a semi-colon, changed from a comma. The last element is also thus separated. ---------------------------------------------------------------------------- 12/10/98 In Dataset Overview, "SPACECRAFT SOLAR DISTANCE" is changed to "SPACECRAFT-SUN DISTANCE", "SPACECRAFT EARTH DISTANCE" is changed to "SPACECRAFT-EARTH DISTANCE", and "DATE JULIAN" is changed to "JULIAN DATE". ---------------------------------------------------------------------------- 12/04/98 In Dataset Overview, "e.g." is changed to "e.g.," throughout. ---------------------------------------------------------------------------- 12/04/98 In Dataset Overview, "status ," is changed to "status,". ---------------------------------------------------------------------------- 12/04/98 In Dataset Overview, "The instrument readings are the amplitude codes of the detectors aboard the instrument, the rise time integer codes of the charge level rise times of the detectors, the integer code representing the difference in starting times of the ion signal and the electron signal, and coincidences between the electron and ion signals, and between the ion and channeltron signals." is changed to "The instrument readings include the amplitude codes of the detectors aboard the instrument and the integer codes representing the charge level rise times of the detectors, the difference in starting times of the ion signal and the electron signal, electron and ion signal coincidence, and ion and channeltron signal coincidence." ---------------------------------------------------------------------------- 12/04/98 In Calibration Data, and CONFIDENCE_LEVEL_NOTE, Calibration Data, "[GOLLER1988]" is changed to "Goller (1988)" ---------------------------------------------------------------------------- 03/18/99 In Calibration Data, add "The data were provided in a private communication to M. Sykes (Jun 29 03:04 MST 1995) by M. Baguhl. They are the results of these experiments for impacts at an angle of 34 degrees from the detector axis." ---------------------------------------------------------------------------- 12/04/98 In Processing Level, "Some processing is done at the time of the impact observation. This processing categorizes the detector responses to transmit the data efficiently back to Earth." is changed to "Some processing was done at the time of the impact observation. This processing categorized the detector responses to transmit the data efficiently back to Earth." and "On Earth, these integer codes are then fit..." is changed to "On Earth, these integer codes were then fit..." and ". See [GOLLER&GRUEN1989 and GRUENETAL1995C]" is changed to "(Goller and Gruen 1989; Gruen et al., 1995c)." and "physcial" (typo) is changed to "physical" ---------------------------------------------------------------------------- 12/03/98 In Sampling Parameters, "occurance" (typo) is changed to "occurrence" ---------------------------------------------------------------------------- 12/10/98 In Data Reduction - Impact Speed, "If IT=0, then VIT is invalid and set to -99.9" is changed to "If IT=0, then VIT is invalid" and "If ET=0, then VET is invalid and set to -99.9" is changed to "If ET=0, then VET is invalid" ---------------------------------------------------------------------------- 12/04/98 In Data Reduction - Impact Speed, "[GOLLER&GRUEN1989 and GRUENETAL1995C]" is changed to "(Goller and Gruen 1989; Gruen et al., 1995c)" and "corresonding" (typo) is changed to "corresponding" ---------------------------------------------------------------------------- 03/18/99 In Data Reduction - Impact Speed, "... procedures described in part by GRUNETAL1995C and below (see B072295.ASC in the /document directory of this volume)." is changed to "... procedures described in part by Gruen et al. (1995c) and a private communication to M. Sykes (Jul 22 03:43 MST 1995) from M. Baguhl." ---------------------------------------------------------------------------- 03/18/99 In Data Reduction - Impact Speed Error Factor, "(see B030696.ASC in the /document directory of this volume)" is changed to "(private communication to M. Sykes from M. Baguhl, Mar 6 03:57 MST 1996) ---------------------------------------------------------------------------- 03/18/99 In Data Reduction - Impactor Mass Error Factor, "(see B030696.ASC in the /document directory of this volume...)" is changed to "(Private communication to M. Sykes from M. Baguhl, Mar 6 03:57 MST 1996...)" ---------------------------------------------------------------------------- 12/04/98 In Data Reduction - Impact Speed, and Data Reduction - Impactor Mass, "[GRUENETAL1995C]" and GRUENETAL1995C are changed to "Gruen et al. (1995c)" throughout. ---------------------------------------------------------------------------- 12/04/98 In Data Reduction - Impactor Mass Error Factor "GRUENETAL1995A is changed to "Gruen et al. (1995a)" and "MEF=10**(sqrt((3.5*log(VEF))**2+(log(2.))**2)" is changed to "MEF=10**(sqrt((3.5*log(VEF))**2+(log(2.))**2))" ---------------------------------------------------------------------------- 12/06/98 In Coordinate System, "Equinox" is changed to "equinox" throughout. ---------------------------------------------------------------------------- 03/24/99 CONFIDENCE_LEVEL_NOTE, Time Error Value (TEV), has been added: "Prior to 1993, data were not released with individual TEV values. Time resolutions given by Gruen et al. (1995b) and applied retrospectively to data prior to 1993 yields the following distribution of TEV across those impact and noise events: galddust galdevnt IMPACT SEQUENCE NUMBER | TEV EVENT SEQUENCE NUMBER | TEV ------------------------------ ----------------------------- 001-099 | 66 0001-0607 | 0 100-138 | 259 0608-1099 | 66 139-147 | 0 1100-1218 | 259 148-344 | 259 1219-1851 | 0 345-352 | 0 1852-3244 | 259 353-359 | 259 3245-4627 | 0 4628-5446 | 259 These values were confirmed in a private communication to M. Sykes (Dec 9 05:06 MST 1998) by H. Krueger. Based on information in Krueger et al. (1999b), TEV values were changed for the following events to the values below: IMPACT SEQUENCE NUMBER | TEV EVENT SEQUENCE NUMBER | TEV ------------------------------ ----------------------------- 2762-2767 | 70 8991-8996 | 70 2768-2837 | 2 8997-9069 | 2 2848-2851 | 33 9080-9083 | 33 2852-2869 | 2 9084-9101 | 2 NOTE: In the current (1998) PDS release, the Galileo DDS Status File (galdstat.tab) extends only through the end of 1995. Thus, Time Error Factors for 1996 and 1997 impact and event data cannot be checked against the sampling mode of the DDS until the release of the updated status file." ---------------------------------------------------------------------------- 12/04/98 CONFIDENCE_LEVEL_NOTE, Impact Times, "The impact times are recorded with an accuracy of 4 hours for most of the Galileo mission (this value has been set in order to bridge gaps in the data transmission as long as one month) [GRUNETAL1995C]" is changed to: "The impact times during the Cruise phase of the mission were recorded with an accuracy of 1.1 hours. After June 25, 1990, inclusive, the accuracy was 4.3 hours (this value has been set in order to bridge gaps in the data transmission as long as one month) (Gruen et al. 1995b; Krueger et al. 1999b). There were also periods in which more frequent memory reads resulted in a time resolution of 2/3 seconds." ---------------------------------------------------------------------------- 03/22/99 CONFIDENCE_LEVEL_NOTE, Sector, has been added: "In V1.0 of this data set, SECTOR was reported in degrees. In V2.0 Sector is reported as its original 8-bit word, and has a value between 0 and 255 (when valid). Conversion to degrees may be accomplished through scaling by 1.40625." ---------------------------------------------------------------------------- 03/18/99 CONFIDENCE_LEVEL_NOTE, Impact Speed, "The reason for the exclusion of the values IA=49 and EA=15 is empirical. These values are close to the switching points of the amplifier ranges and therefore produce incorrect time measurements. The adjustment of the times in amplifier range 2 was made in order to prevent illegal time values (see B072295.ASC)." is changed to "In a private communication to M. Sykes (Jul 22 03:43 MST 1995), M. Baguhl stated that the reason for the exclusion of the values IA=49 and EA=15 is empirical. These values are close to the switching points of the amplifier ranges and therefore produce incorrect time measurements. The adjustment of the times in amplifier range 2 was made in order to prevent illegal time values." --------------------------------------------------------------------------- 12/03/98 CONFIDENCE_LEVEL_NOTE, Spacecraft Earth distance, has been added: "The value for the same impact event in galddust.tab and galdevnt.tab is different, but less than 7500 km." ---------------------------------------------------------------------------- 12/03/98 CONFIDENCE_LEVEL_NOTE, Entrance Grid Amplitude Code (PA), has been added: "In the data that have been published in the literature and electronically prior to 11/98, there are values of PA which exceed 47. In a private communication to M. Sykes (Mar 6 03:57 MST 1996), Michael Baguhl and Rainer Riemann stated: 'Values of PA greater 47 are caused by a bit flip (caused by a timing bug in the sensor electronics) of the MSB. For values greater 47, a value of 16 has to be subtracted.' This correction was made to all PDS DDS files prior to 11/98. As a consequence of subsequent uncertainty about the origin of PA values greater than 47, in a private communication to M. Sykes (Nov 6 04:07 MST 1998), H. Krueger requested that PA values greater than 47 be corrected to '99'. This has been done in releases of the DDS data through the PDS after 11/98." ---------------------------------------------------------------------------- 03/18/99 CONFIDENCE_LEVEL_NOTE, Ion Channeltron Coincidence (ICC), has been added: "The designation ICC is used following Gruen et al. (1995c) and Krueger et al. (1999b), noting that in Gruen et al. (1995a and b) and Krueger et al. (1999a) the designation is IIC." ---------------------------------------------------------------------------- 03/18/99 CONFIDENCE_LEVEL_NOTE, Channeltron Voltage Level (HV), has been added: "The nominal high voltage HV=4 (1250V) could not be used because of unexpected noise on the channeltron. It is assumed that the nearby radioactive thermal generators (RTGs) are to blame, although other causes cannot be excluded. During ground tests (without RTGs) no such noise was observed. See Gruen et al. (1995b)." ---------------------------------------------------------------------------- 12/03/98 In the REFERENCE_KEY_IDs "GOLLER&GRUN1989" --> "GOLLER&GRUEN1989" "GRUNETAL1995A" --> "GRUENETAL1995A" "GRUNETAL1995B" --> "GRUENETAL1995B" "GRUNETAL1995C" --> "GRUENETAL1995C" ---------------------------------------------------------------------------- 12/03/98 Added: OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "KRUEGERETAL1999A" END_OBJECT = DATA_SET_REFERENCE_INFORMATION OBJECT = DATA_SET_REFERENCE_INFORMATION REFERENCE_KEY_ID = "KRUEGERETAL1999B" END_OBJECT = DATA_SET_REFERENCE_INFORMATION ---------------------------------------------------------------------------- 12/03/98 Removed all REFERENCE_DESC. ----------------------------------------------------------------------------