CCSD3ZF0000100000001NJPL3IF0PDSX00000001 PDS_VERSION_ID = PDS3 /* File Characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 136 FILE_RECORDS = 968 /* Data Object Pointers */ ^TABLE = "ULYDDUST.TAB" /* Identification Keywords */ DATA_SET_NAME = "ULYSSES DUST DETECTOR SYSTEM V1.0" DATA_SET_ID = "UL-D-UDDS-5-DUST-V1.0" PRODUCT_ID = "ULYD-ULYDDUST-199603" SPACECRAFT_NAME = ULYSSES INSTRUMENT_NAME = "Ulysses Dust Detector" TARGET_NAME = DUST START_TIME = 1990-10-28T13:51 STOP_TIME = 1992-12-29T01:06 PRODUCT_CREATION_TIME = 1996-03-06 /* Peer Review Date */ RECORD_FORMAT = "(i5,f13.4,f6.1,5i2,8i3,5i2,f8.5,2f6.1, f8.5,3i4,2f5.1,e9.2,f7.1)" /* Data Object Descriptions */ OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 968 COLUMNS = 32 ROW_BYTES = 136 DESCRIPTION = "Detector responses and derived quantities from the Ulysses dust detector as well as spacecraft geometry information. See [GRUNETAL1995A] for more information." OBJECT = COLUMN NAME = "SEQUENCE NUMBER" DESCRIPTION = "The number associated with the impact with 1 being the first impact recorded and n being the n'th impact recorded." DATA_TYPE = "ASCII INTEGER" START_BYTE = 1 BYTES = 5 FORMAT = I5 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DATE JULIAN" UNIT = "DAY" DESCRIPTION = "The Julian date of the impact." DATA_TYPE = "ASCII REAL" START_BYTE = 6 BYTES = 13 FORMAT = "F13.4" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SECTOR" UNIT = "DEGREES" DESCRIPTION = "The angular orientation of the sensor axis about the spacecraft spin axis at the time of each impact, 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 was originally recorded as an integer value between 0 and 255, but has been converted to degrees through scaling by 1.40625." DATA_TYPE = "ASCII REAL" START_BYTE = 19 BYTES = 6 FORMAT = "F6.1" MISSING_CONSTANT = 999.9 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ION COLLECTOR THRESHOLD" DESCRIPTION = "Code (ICP) corresponding to the threshold set for the positive ion charge impulse(Q_I) at the time of impact. 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 = 25 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ELECTRON COLLECTOR THRESHOLD" DESCRIPTION = "Code (ECP) corresponding to the threshold set for the electron charge impulse(Q_E) at the time of impact. 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 = 27 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CHANNELTRON VOLTAGE LEVEL" DESCRIPTION = "Code (HV) corresponding to the channeltron high voltage level(HV) set at the time of impact with integers representing fixed voltage differences. HV|Voltage(Volts) --+------- 0| 200 1| 900 2| 1020 3| 1140 " DATA_TYPE = "ASCII INTEGER" START_BYTE = 29 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "CHANNELTRON THRESHOLD" DESCRIPTION = "Code (CCP) corresponding to the threshold set for the channeltron charge(Q_C) pulse at the time of impact. 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 = 31 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ENTRANCE GRID THRESHOLD" DESCRIPTION = "Code (PCP) corresponding to the threshold set for the entrance grid charge pulse(Q_P) at the time of impact 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 = 33 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 35 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 38 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 41 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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." DATA_TYPE = "ASCII INTEGER" START_BYTE = 44 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 47 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 50 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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 impact pulse 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 = 53 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 56 BYTES = 3 FORMAT = I3 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 59 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ION CHANNELTRON COINCIDENCE" DESCRIPTION = "This is an indicator of coincidence of measured channeltron and positive charge pulses (IIC). 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." DATA_TYPE = "ASCII INTEGER" START_BYTE = 61 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 63 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 65 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN 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 = 67 BYTES = 2 FORMAT = I2 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPACECRAFT SOLAR DISTANCE" UNIT = "AU" DESCRIPTION = "The distance from the spacecraft to the sun." DATA_TYPE = "ASCII REAL" START_BYTE = 69 BYTES = 8 FORMAT = "F8.5" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ECLIPTIC LONGITUDE" UNIT = "DEGREE" DESCRIPTION = "The heliocentric ecliptic longitude (Equinox 1950.0) of the spacecraft at the time of impact." DATA_TYPE = "ASCII REAL" START_BYTE = 77 BYTES = 6 FORMAT = "F6.1" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ECLIPTIC LATITUDE" UNIT = "DEGREE" DESCRIPTION = "The heliocentric ecliptic latitude (Equinox 1950.0) of the spacecraft at the time of impact." DATA_TYPE = "ASCII REAL" START_BYTE = 83 BYTES = 6 FORMAT = "F6.1" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SPACECRAFT JUPITER DISTANCE" UNIT = "AU" DESCRIPTION = "The distance from the spacecraft to Jupiter." DATA_TYPE = "ASCII REAL" START_BYTE = 89 BYTES = 8 FORMAT = "F8.5" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ROTATION ANGLE" UNIT = "DEGREE" DESCRIPTION = "The angular orientation of the sensor axis about the spacecraft spin axis at the time of each impact, 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." DATA_TYPE = "ASCII INTEGER" START_BYTE = 97 BYTES = 4 FORMAT = I4 MISSING_CONSTANT = 999 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DETECTOR ECLIPTIC LONGITUDE" UNIT = "DEGREE" DESCRIPTION = "The ecliptic longitude (Equinox 1950.0) of the sensor axis." DATA_TYPE = "ASCII INTEGER" START_BYTE = 101 BYTES = 4 FORMAT = I4 MISSING_CONSTANT = 999 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DETECTOR ECLIPTIC LATITUDE" UNIT = "DEGREE" DESCRIPTION = "The ecliptic latitude (Equinox 1950.0) of the sensor axis." DATA_TYPE = "ASCII INTEGER" START_BYTE = 105 BYTES = 4 FORMAT = I4 MISSING_CONSTANT = 999 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PARTICLE SPEED" UNIT = "KILOMETER PER SECOND" DESCRIPTION = "The mean impact speed of the particle. When no speed can be determined, the value is set to 99.9" DATA_TYPE = "ASCII REAL" START_BYTE = 109 BYTES = 5 FORMAT = "F5.1" MISSING_CONSTANT = 99.9 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PARTICLE SPEED ERROR FACTOR" DESCRIPTION = "An upper and lower estimate of impactor speed is obtained by multiplying and dividing, respectively, the mean particle speed by this factor. When no speed (hence error factor) can be determined, the value of this factor is set to 99.9" DATA_TYPE = "ASCII REAL" START_BYTE = 114 BYTES = 5 FORMAT = "F5.1" MISSING_CONSTANT = 99.9 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PARTICLE MASS" UNIT = "GRAM" DESCRIPTION = "The mean particle mass. When the particle is not determined, the mass is not determined and is set to 0.e0." DATA_TYPE = "ASCII REAL" START_BYTE = 119 BYTES = 9 FORMAT = "E9.2" MISSING_CONSTANT = 0 END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PARTICLE MASS ERROR FACTOR" DESCRIPTION = "An upper and lower estimate of impactor mass is obtained by multiplying and dividing, respectively, the mean particle mass by this factor. When the speed is not determined, neither is the mass, and this factor is set to 9999.9 ." DATA_TYPE = "ASCII REAL" START_BYTE = 128 BYTES = 7 FORMAT = "F7.1" MISSING_CONSTANT = 9999.9 END_OBJECT = COLUMN END_OBJECT = TABLE END