PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = " 01 Jan 1996 Creation of V1.0 by M. Sykes (SBN) 31 Dec 1998 Final data updates and new data deliveries (through 1995) to PDS SBN by DDS Science Team (H. Krueger, MPI Heidelberg) Upgrades and corrections for V2.0 by M. Sykes (SBN) Added 3 columns: column 2 EVENT_SEQUENCE_NUMBER column 3 EVENT_TIME column 27 SPACECRAFT-EARTH_DISTANCE " /* File Characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 165 FILE_RECORDS = 1477 /* Data Object Pointers */ ^TABLE = "ulyddust.tab" /* Identification Keywords */ DATA_SET_NAME = "ULYSSES DUST DETECTION SYSTEM V2.0" DATA_SET_ID = "ULY-D-UDDS-5-DUST-V2.0" PRODUCT_ID = "ULYD-ULYDDUST-199903" PRODUCT_NAME = "Ulysses DDS Impacts Table" SPACECRAFT_NAME = ULYSSES INSTRUMENT_NAME = "ULYSSES DUST DETECTION SYSTEM" TARGET_NAME = DUST START_TIME = 1990-10-28T13:51 STOP_TIME = 1995-12-28T01:08 PRODUCT_CREATION_TIME = 1998-11-06 RECORD_FORMAT = "(i6,1x,i6,1x,a14,1x,f12.4,1x,i1,1x,i1, 1x,i3,1x,i2,1x,i2,1x,i2,1x,i2,1x,i2,1x,i2,1x,i1,1x,i1,1x,i2,1x,i2,1x,i1, 1x,i1,1x,i1,1x,i1,1x,i1,1x,a1,1x,f7.5,1x,f5.1,1x,f5.1,1x,f7.5,1x,f7.5, 1x,i3,1x,i3,1x,i3,1x,f4.1,1x,f4.1,1x,e8.2,1x,f6.1)" /* Data Object Descriptions */ OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 1477 COLUMNS = 35 ROW_BYTES = 165 DESCRIPTION = "Detector responses and derived quantities from the Ulysses dust detector as well as spacecraft geometry information for reliable dust impacts. See Gruen et al. (1995a) [GRUENETAL1994A] and Krueger et al. (1999a) [KRUEGERETAL1999A] for more information." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "IMPACT SEQUENCE NUMBER" DESCRIPTION = "The number associated with a reliable impact with 1 being the first impact recorded and n being the n'th impact recorded." DATA_TYPE = "ASCII INTEGER" START_BYTE = 1 BYTES = 6 FORMAT = I6 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "EVENT SEQUENCE NUMBER" DESCRIPTION = "The number associated with an event in ULYDEVNT.TAB, with 1 being the first event recorded and n being the n'th event recorded." DATA_TYPE = "ASCII INTEGER" START_BYTE = 8 BYTES = 6 FORMAT = I6 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "EVENT TIME" DESCRIPTION = "The time of the event given in year, day of year, hours and minutes in the general form: yyyy-dddThh:mm. See Confidence Level Note, Impact Times, in ULYD.CAT." DATA_TYPE = "TIME" START_BYTE = 15 BYTES = 14 FORMAT = A14 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "JULIAN DATE" UNIT = "DAY" DESCRIPTION = "The full Julian date of the event." DATA_TYPE = "ASCII REAL" START_BYTE = 30 BYTES = 12 FORMAT = "F12.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "EVENT CLASS" DESCRIPTION = "CLASS (CLN) is the event category class which is represented by a single integer ranging from 0 to 3. Class 0 includes all events which are not categorized in a higher class. For classes 1 through 3 the measured parameters and their relation to each other are increasingly restricted, so that CLASS = 3 generally represents dust impact events only. CLASS is determined from ION AMPLITUDE (IA), CHANNELTRON AMPLITUDE (CA), ELECTRON AMPLITUDE (EA), ELECTRON RISE TIME (ET), ION RISE TIME (IT), ION CHANNELTRON COINCIDENCE (IC), ELECTRON ION COINCIDENCE (EI), and noise counters of the electron collector (EN), ion collector (IN), and the channeltron (CN). On board qualification scheme. Parameters: class 0 class 1 class 2 class 3 EA EA > 0 EA > 0 IA IA > 0 IA > 0 IA > 0 IA > 0 CA CA > 0 CA > 0 CA > 0 CA > 0 ET 1 <= ET <= 15 1 <= ET <= 15 IT 1 <= IT <= 15 1 <= IT <= 15 IC IC = 0 IC = 0 EI EI = 1 EI = 1 Noise counter of: EN EN <= 8 IN IN <= 2 CN CN <= 8 " DATA_TYPE = "ASCII INTEGER" START_BYTE = 43 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "ION AMPLITUDE RANGE" DESCRIPTION = "The ION AMPLITUDE RANGE (AR) is the classification of the ION AMPLITUDE value into one of 6 subranges. Each subrange is denoted by an integer between the values of 1 and 6. The six amplitude sub-ranges correspond roughly to a decade of measured electronic charge. AR | ION AMPLITUDE ----+-------------- 1 | 0 - 7 2 | 8 - 15 3 | 16 - 23 4 | 24 - 32 5 | 48 - 55 6 | 56 - 60 " DATA_TYPE = "ASCII INTEGER" START_BYTE = 45 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "SECTOR" DESCRIPTION = "The angular orientation of the sensor axis about the spacecraft spin axis at the time of each event, measured in the plane perpendicular to the spin axis of Ulysses which points roughly toward the Earth. The angle is defined to be zero when the dust sensor axis looks closest to the Sun, and its value increases counter clockwise when the spacecraft is viewed from Earth. SECTOR is an 8-bit counter having an integer value between 0 and 255, inclusive, and is converted to degrees through scaling by 1.40625. See Confidence Level Note, Sector, in ULYD.CAT." DATA_TYPE = "ASCII INTEGER" START_BYTE = 47 BYTES = 3 FORMAT = "I3" MISSING_CONSTANT = 999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "ION AMPLITUDE CODE" DESCRIPTION = "An integer code (IA) corresponding to the logarithmic mean of the minimum and maximum range of the bin within which falls the maximum observed signal associated with a single event measured by the ion collector. Conversions to units of coulomb are given in ULYDCODE.TAB. Increasing values indicate increasing amplitudes. Eight digitization steps cover about one decade in charge and steps 32 through 47 are not used. Apparent gaps in the otherwise uniform amplitude sequences occur at steps 16, 17 and 48. These are caused by transitions between different amplifiers." DATA_TYPE = "ASCII INTEGER" START_BYTE = 51 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "ELECTRON AMPLITUDE CODE" DESCRIPTION = "An integer code (EA) corresponding to the logarithmic mean of the minimum and maximum range of the bin within which falls the maximum observed signal associated with a single event measured by the electron collector. Conversions to units of coulomb are given in ULYDCODE.TAB. Increasing values indicate increasing amplitudes. Eight digitization steps cover about one decade in charge and steps 32 through 47 are not used. Apparent gaps in the otherwise uniform amplitude sequences occur at steps 16, 17, 18 and 48. These are caused by transitions between different amplifiers." DATA_TYPE = "ASCII INTEGER" START_BYTE = 54 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "CHANNELTRON AMPLITUDE CODE" DESCRIPTION = "An integer code (CA) corresponding to the logarithmic mean of the minimum and maximum range of the bin within which falls the maximum observed signal associated with a single event measured by the channeltron. Conversions to units of coulomb are given in ULYDCODE.TAB. Increasing values indicate increasing amplitudes." DATA_TYPE = "ASCII INTEGER" START_BYTE = 57 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "ION RISE TIME CODE" DESCRIPTION = "An integer code (IT) corresponding to the logarithmic mean of the minimum and maximum range of the bin within which falls the rise time associated with a single event measured by the ion collector. Conversions to units of micro-seconds are given in ULYDCODE.TAB. Increasing values indicate increasing rise times." DATA_TYPE = "ASCII INTEGER" START_BYTE = 60 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "ELECTRON RISE TIME CODE" DESCRIPTION = "An integer code (ET) corresponding to the logarithmic mean of the minimum and maximum ranges of the bin within which falls the rise time associated with a single event measured by the electron collector. Conversions to units of micro-seconds are given in ULYDCODE.TAB. Increasing values indicate increasing rise times." DATA_TYPE = "ASCII INTEGER" START_BYTE = 63 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "ELECTRON ION TIME CODE" DESCRIPTION = "An integer code (EIT) corresponding to the logarithmic mean of the minimum and maximum range of the bin within which falls the difference in time between the start of the electron signal and the start of the ion signal which are associated with a single event. Conversions to units of micro-seconds are given in ULYDCODE.TAB. Increasing values indicate increasing electron minus ion rise time differences." DATA_TYPE = "ASCII INTEGER" START_BYTE = 66 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = "ELECTRON ION COINCIDENCE" DESCRIPTION = "This is an indicator of coincidence of measured negative and positive charge pulses (EIC). The difference in times between the achievement of threshold values for the measured negative and positive charges is determined. If that difference is less than 200 nanoseconds, this variable is set to 1, and 0 otherwise." DATA_TYPE = "ASCII INTEGER" START_BYTE = 69 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = "ION CHANNELTRON COINCIDENCE" DESCRIPTION = "This is an indicator of coincidence of measured channeltron and positive charge pulses (ICC). The difference in times between the achievement of threshold values for the measured channeltron and positive charges is determined. If that difference is less than 200 nanoseconds, this variable is set to 1, and 0 otherwise. See Confidence Level Note, Ion Channeltron Coincidence, in ULYD.CAT." DATA_TYPE = "ASCII INTEGER" START_BYTE = 71 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = "ENTRANCE GRID AMPLITUDE CODE" DESCRIPTION = "An integer code (PA) corresponding to the logarithmic mean of the minimum and maximum range of the bin within which falls the maximum observed signal associated with a single event measured by the entrance grid. Conversions to units of coulomb are given in ULYDCODE.TAB. Increasing values indicate increasing amplitudes. See Confidence Level Note, Entrance Grid Amplitude Code, in ULYD.CAT." DATA_TYPE = "ASCII INTEGER" START_BYTE = 73 BYTES = 2 FORMAT = I2 MISSING_CONSTANT = 99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = "ENTRANCE GRID RISE TIME CODE" DESCRIPTION = "An integer code (PET) corresponding to the logarithmic mean of the minimum and maximum ranges of the bin within which falls the time difference between the entrance grid pulse and the negative charge (electron collector) signal associated with a single event. Conversions to units of micro-seconds are given in ULYDCODE.TAB. Increasing values indicate increasing rise times." DATA_TYPE = "ASCII INTEGER" START_BYTE = 76 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = "EVENT DEFINITION" DESCRIPTION = "The EVENT DEFINITION (EVD) indicates which channels initiates a measuring cycle. The x in each column indicates the channels for which threshold values are exceeded. EVD|Q_I Q_E Q_C ---+----------- 0 | x x x 1 | x x 2 | x x 3 | x 4 | x x 5 | x 6 | x " DATA_TYPE = "ASCII INTEGER" START_BYTE = 79 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = "ION COLLECTOR THRESHOLD" DESCRIPTION = "Code (ICP) corresponding to the threshold set for the positive ion charge impulse(Q_I) at the time of an event. ICP|Q_I (coulomb) ---+---------------- 0 | 9.0E-15 1 | 2.7E-14 2 | 6.3E-14 3 | 1.6E-13 " DATA_TYPE = "ASCII INTEGER" START_BYTE = 81 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 20 NAME = "ELECTRON COLLECTOR THRESHOLD" DESCRIPTION = "Code (ECP) corresponding to the threshold set for the electron charge impulse(Q_E) at the time of an event. ECP|Q_E (coulomb) ---+---------------- 0 | -8.5E-15 1 | -2.6E-14 2 | -6.0E-14 3 | -1.5E-13 " DATA_TYPE = "ASCII INTEGER" START_BYTE = 83 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 21 NAME = "CHANNELTRON THRESHOLD" DESCRIPTION = "Code (CCP) corresponding to the threshold set for the channeltron charge(Q_C) pulse at the time of an event. CCP|Q_C (coulomb) ---+---------------- 0 | -8.8E-14 1 | -2.6E-13 2 | -5.8E-13 3 | -1.5E-12 " DATA_TYPE = "ASCII INTEGER" START_BYTE = 85 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 22 NAME = "ENTRANCE GRID THRESHOLD" DESCRIPTION = "Code (PCP) corresponding to the threshold set for the entrance grid charge pulse(Q_P) at the time of an event separately for positively and negatively charged particles. PCP|Q_P (positive) (coulomb)|Q_P (negative) (coulomb) ---+------------------------+------------------------ 0 | 1.4E-14 | -1.5E-14 1 | 4.3E-14 | -4.4E-14 2 | 1.0E-13 | -1.0E-13 3 | 2.6E-13 | -2.5E-13 " DATA_TYPE = "ASCII INTEGER" START_BYTE = 87 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 23 NAME = "CHANNELTRON VOLTAGE LEVEL" DESCRIPTION = "Code (HV) corresponding to the channeltron high voltage level set at the time of an event with integers representing fixed voltage differences. See Confidence Level Note, Channeltron Voltage Level, in ULYD.CAT. HV|Voltage(Volts) --+------- ?| UNKN X| OFF 0| 200 1| 900 2| 1020 3| 1140 4| 1250 " DATA_TYPE = "CHARACTER" START_BYTE = 89 BYTES = 1 FORMAT = A1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 24 NAME = "SPACECRAFT-SUN DISTANCE" UNIT = "AU" DESCRIPTION = "The distance from the spacecraft to the sun." DATA_TYPE = "ASCII REAL" START_BYTE = 91 BYTES = 7 FORMAT = "F7.5" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 25 NAME = "ECLIPTIC LONGITUDE" UNIT = "DEGREE" DESCRIPTION = "The heliocentric ecliptic longitude (Equinox 1950.0) of the spacecraft." DATA_TYPE = "ASCII REAL" START_BYTE = 99 BYTES = 5 FORMAT = "F5.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 26 NAME = "ECLIPTIC LATITUDE" UNIT = "DEGREE" DESCRIPTION = "The heliocentric ecliptic latitude (Equinox 1950.0) of the spacecraft." DATA_TYPE = "ASCII REAL" START_BYTE = 105 BYTES = 5 FORMAT = "F5.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 27 NAME = "SPACECRAFT-EARTH DISTANCE" UNIT = "AU" DESCRIPTION = "The distance from the spacecraft to Earth." DATA_TYPE = "ASCII REAL" START_BYTE = 111 BYTES = 7 FORMAT = "F7.5" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 28 NAME = "SPACECRAFT-JUPITER DISTANCE" UNIT = "AU" DESCRIPTION = "The distance from the spacecraft to Jupiter." DATA_TYPE = "ASCII REAL" START_BYTE = 119 BYTES = 7 FORMAT = "F7.5" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 29 NAME = "ROTATION ANGLE" UNIT = "DEGREE" DESCRIPTION = "The angular orientation of the sensor axis about the spacecraft spin axis at the time of each event, measured in the plane perpendicular to the spin axis of Ulysses which points roughly toward the Earth. The angle is defined to be zero when the dust sensor axis looks closest to the ecliptic north and it increases as Ulysses rotates positively about its spin axis (by the right hand rule). SECTOR is an 8-bit counter having an integer value between 0 and 255, and may be converted to degrees through scaling by 1.40625. See Confidence Level Note, Sector, in ULYD.CAT." DATA_TYPE = "ASCII INTEGER" START_BYTE = 127 BYTES = 3 FORMAT = I3 MISSING_CONSTANT = 999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 30 NAME = "DETECTOR ECLIPTIC LONGITUDE" UNIT = "DEGREE" DESCRIPTION = "The spacecraft-centered ecliptic longitude (Equinox 1950.0) of the sensor axis." DATA_TYPE = "ASCII INTEGER" START_BYTE = 131 BYTES = 3 FORMAT = I3 MISSING_CONSTANT = 999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 31 NAME = "DETECTOR ECLIPTIC LATITUDE" UNIT = "DEGREE" DESCRIPTION = "The spacecraft-centered ecliptic latitude (Equinox 1950.0) of the sensor axis." DATA_TYPE = "ASCII INTEGER" START_BYTE = 135 BYTES = 3 FORMAT = I3 MISSING_CONSTANT = 999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 32 NAME = "PARTICLE SPEED" UNIT = "KILOMETER PER SECOND" DESCRIPTION = "The impact speed of the particle. See Data Reduction, Impact Speed, in ULYD.CAT. When no speed can be determined, the value is set to 99.9" DATA_TYPE = "ASCII REAL" START_BYTE = 139 BYTES = 4 FORMAT = "F4.1" MISSING_CONSTANT = 99.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 33 NAME = "PARTICLE SPEED ERROR FACTOR" DESCRIPTION = "An upper and lower estimate of impactor speed is obtained by multiplying and dividing, respectively, the particle speed by this factor. When no speed (hence error factor) can be determined, the value of this factor is set to 99.9. See Data Reduction, Impact Speed Error Factor, in ULYD.CAT." DATA_TYPE = "ASCII REAL" START_BYTE = 144 BYTES = 4 FORMAT = "F4.1" MISSING_CONSTANT = 99.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 34 NAME = "PARTICLE MASS" UNIT = "GRAM" DESCRIPTION = "The particle mass. See Data Reduction, Impactor Mass, is ULYD.CAT. When the particle speed is not determined, the mass is not determined and is set to 0.e0." DATA_TYPE = "ASCII REAL" START_BYTE = 149 BYTES = 8 FORMAT = "E8.2" MISSING_CONSTANT = 0 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 35 NAME = "PARTICLE MASS ERROR FACTOR" DESCRIPTION = "An upper and lower estimate of impactor mass is obtained by multiplying and dividing, respectively, the particle mass by this factor. When the speed is not determined, neither is the mass, and this factor is set to 9999.9 . See Data Reduction, Impactor Mass Error Factor, in ULYD.CAT." DATA_TYPE = "ASCII REAL" START_BYTE = 158 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = 9999.9 END_OBJECT = COLUMN END_OBJECT = TABLE END