PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 256 FILE_RECORDS = 31178 ^TABLE = "CDAEVENTS.TAB" DATA_SET_NAME = "CASSINI CDA DATA V1.0" DATA_SET_ID = "CO-D-CDA-3/4/5-DUST-V1.0" PRODUCT_ID = "CDA_DA_IMPACTS" PRODUCT_NAME = "CASSINI CDA DUST ANALYSER EVENTS TABLE" SPACECRAFT_NAME = "CASSINI ORBITER" INSTRUMENT_NAME = "COSMIC DUST ANALYSER" TARGET_NAME = "DUST" START_TIME = "2007-122T00:00:00" STOP_TIME = "2007-152T23:59:59" PRODUCT_CREATION_TIME = "2008-087T00:22:07" RECORD_FORMAT = "(I10,1X,A17,1X,F14.6,1X,E8.1,1X,I1,1X,E8.1,1X,I1,1X,E8.1,1X,I1,1X,E8.1, 1X,I1,3(1X,E8.1),1X,I1,2(1X,F7.2),1X,F6.4,2(1X,F7.2), 1X,F8.2,3(1X,F6.2),2(1X,F7.2),1X,I2,1X,I3,1X,F5.1,1X,F4.1,1X,E8.1, 1X,F4.1,2(1X,E8.1),1X,I1)" OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 31178 COLUMNS = 35 ROW_BYTES = 256 DESCRIPTION = "Detector responses and derived quantities from the Cassini dust detector as well as spacecraft geometry information for each event wich triggered the instrument. An event class flag is provided to distinguish between 4 differents types of signals: test pulses, noise, weak and strong impacts. However, this flag value may be poorly reliable. Only a carefully analysis of the individual charge signals combined with the CDA documentation (see SRAMAETAL2004B) can confirm the event class. For each event, and for each of the QP, QT, QI, QC channels, a flag is set to 1 if a charge signal was transmitted to Earth. The charge signal can then be found in the appropriate directory." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "EVENT_ID" DESCRIPTION = "An identifier number associated with an event." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 1 BYTES = 10 MISSING_CONSTANT = -999999999 FORMAT = "I10" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "EVENT_TIME" DESCRIPTION = "The UTC time of an event given in year, day of year, hours, minutes, and seconds in the general form:yyyy-dddThh:mm:ss. Uncertainty is smaller than 1 second." DATA_TYPE = "TIME" START_BYTE = 12 BYTES = 17 MISSING_CONSTANT = "9999-999T99:99:99" FORMAT = "A17" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "EVENT_JULIAN_DATE" UNIT = "DAY" DESCRIPTION = "The full Julian date of an event. Uncertainty is smaller than 1 second." DATA_TYPE = "ASCII_REAL" START_BYTE = 30 BYTES = 14 MISSING_CONSTANT = -999999.999999 FORMAT = "F14.6" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "QP_AMPLITUDE" UNIT = "COULOMBS" DESCRIPTION = "Amplitude of the entrance grid channel signal. In case of a dust impact event, particle charge as measured by the signal maximum." DATA_TYPE = "ASCII_REAL" START_BYTE = 45 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "QP_SIGNAL_FLAG" DESCRIPTION = "This flag is set to 1 if a charge signal is provided for this event in the QP_SIGNAL directory." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 54 BYTES = 1 MISSING_CONSTANT = 9 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "QI_AMPLITUDE" UNIT = "COULOMBS" DESCRIPTION = "Amplitude of the signal monitored by the integrating amplifier connected to the ion grid. In case of a dust impact event, fraction of the plasma ion charge yield generated by the impact." DATA_TYPE = "ASCII_REAL" START_BYTE = 56 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "QI_SIGNAL_FLAG" DESCRIPTION = "This flag is set to 1 if a charge signal is provided for this event in the QI_SIGNAL directory." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 65 BYTES = 1 MISSING_CONSTANT = 9 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "QT_AMPLITUDE" UNIT = "COULOMBS" DESCRIPTION = "Amplitude of the signal monitored by the integrating amplifier connected to the impact ionization target (IID). In case of a dust impact event, fraction of the plasma electron charge yield generated by the particle impact." DATA_TYPE = "ASCII_REAL" START_BYTE = 67 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "QT_SIGNAL_FLAG" DESCRIPTION = "This flag is set to 1 if a charge signal is provided for this event in the QT_SIGNAL directory." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 76 BYTES = 1 MISSING_CONSTANT = 9 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "QC_AMPLITUDE" UNIT = "COULOMBS" DESCRIPTION = "Amplitude of the signal monitored by the integrating amplifier connected to the chemical analyser target (CAT). In case of a dust impact event, fraction of the plasma electron charge yield generated by the particle impact." DATA_TYPE = "ASCII_REAL" START_BYTE = 78 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "QCSIGNAL_FLAG" DESCRIPTION = "This flag is set to 1 if a charge signal is provided for this event in the QC_SIGNAL directory." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 87 BYTES = 1 MISSING_CONSTANT = 9 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "QI_RISE_TIME" UNIT = "SECONDS" DESCRIPTION = "The signal from the ion grid is reconstructed and converted to Coulomb. The rise time is that time elapsed between 10% and 90% of the signal maximum. The error on the rise time is set by the channel sampling rate and is of 166.6E-9 s. In case of a noise event, or if the signal amplitude is zero, the rise time is set to its missing value." DATA_TYPE = "ASCII_REAL" START_BYTE = 89 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "QT_RISE_TIME" UNIT = "SECONDS" DESCRIPTION = "The signal from the impact ionization detector is reconstructed and converted to Coulomb. The rise time is that time elapsed between 10% and 90% of the signal maximum. The error on the rise time is set by the channel sampling rateand is of 333.3E-9 s. In case of a noise event, or if the signal amplitude is zero, the rise time is set to its missing value." DATA_TYPE = "ASCII_REAL" START_BYTE = 98 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 14 NAME = "QC_RISE_TIME" UNIT = "SECONDS" DESCRIPTION = "The signal from the chemical analyser target is reconstructed and converted to Coulomb. The rise time is that time elapsed between 10% and 90% of the signal maximum. The error on the rise time is set by the channel sampling rate and is of 166.6E-9 s. In case of a noise event, or if the signal amplitude is zero, the rise time is set to its missing value." DATA_TYPE = "ASCII_REAL" START_BYTE = 107 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 15 NAME = "TARGET_FLAG" DESCRIPTION = "In case of an impact event, the target flag (TF) indicates that portion of the target impacted. TF|Portion: 0|Unknown, 1|Chemical Analyser Target, (inner target), 2|Impact Ionization Detector, (outer target), 3|QP-Grid, 4|CAT-Grid, 5|Wall impacts. Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 116 BYTES = 1 MISSING_CONSTANT = 9 FORMAT = "I1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 16 NAME = "SPACECRAFT_RIGHT_ASCENSION" UNIT = "DEGREES" DESCRIPTION = "The heliocentric right ascension (J2000) of the spacecraft." DATA_TYPE = "ASCII_REAL" START_BYTE = 118 BYTES = 7 MISSING_CONSTANT = -999.99 FORMAT = "F7.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 17 NAME = "SPACECRAFT_DECLINATION" UNIT = "DEGREES" DESCRIPTION = "The heliocentric declination (J2000) of the spacecraft." DATA_TYPE = "ASCII_REAL" START_BYTE = 126 BYTES = 7 MISSING_CONSTANT = -999.99 FORMAT = "F7.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 18 NAME = "SPACECRAFT_SUN_DISTANCE" UNIT = "AU" DESCRIPTION = "The distance from the spacecraft to the Sun." DATA_TYPE = "ASCII_REAL" START_BYTE = 134 BYTES = 6 MISSING_CONSTANT = 9.9999 FORMAT = "F6.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 19 NAME = "SPACECRAFT_SATURN_SYSTEM_III_LONGITUDE" UNIT = "DEGREES" DESCRIPTION = "The sub-Saturn longitude of the spacecraft in the System III coordinates: +z is the pole axis of Saturn, xy the ring plane. +x is the projection of the J2000 vernal equinox direction onto the ring plane" DATA_TYPE = "ASCII_REAL" START_BYTE = 141 BYTES = 7 MISSING_CONSTANT = -999.99 FORMAT = "F7.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 20 NAME = "SPACECRAFT_SATURN_SYSTEM_III_LATITUDE" UNIT = "DEGREES" DESCRIPTION = "The sub-Saturn latitude of the spacecraft in the System III coordinates: +z is the pole axis of Saturn, xy the ring plane. +x is the projection of the J2000 vernal equinox direction onto the ring plane" DATA_TYPE = "ASCII_REAL" START_BYTE = 149 BYTES = 7 MISSING_CONSTANT = -999.99 FORMAT = "F7.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 21 NAME = "SPACECRAFT_SATURN_DISTANCE" UNIT = "SAT_RA" DESCRIPTION = "The distance from the spacecraft to Saturn in Saturnian radii." DATA_TYPE = "ASCII_REAL" START_BYTE = 157 BYTES = 8 MISSING_CONSTANT = -9999.99 FORMAT = "F8.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 22 NAME = "SPACECRAFT_X_VELOCITY" UNIT = "KM/S" DESCRIPTION = "The J2000 heliocentric equatorial X component of the Cassini velocity vector." DATA_TYPE = "ASCII_REAL" START_BYTE = 166 BYTES = 6 MISSING_CONSTANT = -99.99 FORMAT = "F6.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 23 NAME = "SPACECRAFT_Y_VELOCITY" UNIT = "KM/S" DESCRIPTION = "The J2000 heliocentric equatorial Y component of the Cassini velocity vector." DATA_TYPE = "ASCII_REAL" START_BYTE = 173 BYTES = 6 MISSING_CONSTANT = -99.99 FORMAT = "F6.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 24 NAME = "SPACECRAFT_Z_VELOCITY" UNIT = "KM/S" DESCRIPTION = "The J2000 heliocentric equatorial Z component of the Cassini velocity vector." DATA_TYPE = "ASCII_REAL" START_BYTE = 180 BYTES = 6 MISSING_CONSTANT = -99.99 FORMAT = "F6.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 25 NAME = "DETECTOR_RIGHT_ASCENSION" UNIT = "DEGREES" DESCRIPTION = "The spacecraft-centered right ascension (J2000) of the sensor axis." DATA_TYPE = "ASCII_REAL" START_BYTE = 187 BYTES = 7 MISSING_CONSTANT = -999.99 FORMAT = "F7.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 26 NAME = "DETECTOR_DECLINATION" UNIT = "DEGREES" DESCRIPTION = "The spacecraft-centered declination (J2000) of the sensor axis." DATA_TYPE = "ASCII_REAL" START_BYTE = 195 BYTES = 7 MISSING_CONSTANT = -999.99 FORMAT = "F7.2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 27 NAME = "COUNTER_NUMBER" DESCRIPTION = "Event counter assigned by the on-board event evaluation algorithm with a value between 0 and 19. The event counter value is a rough measure for the properties of the registered event." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 203 BYTES = 2 MISSING_CONSTANT = -9 FORMAT = "I2" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 28 NAME = "EVENT_QUALITY" DESCRIPTION = "Event quality assigned by the on-board evaluation algorithm. The event class takes values between 0 and 4 and is a rough measure for the quality of the event 0 - noise 1 - test pulse, 2 - small impact, 3 - strong impact, 4 - impacts with TOF mass spectrum). Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 206 BYTES = 3 MISSING_CONSTANT = -9 FORMAT = "I3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 29 NAME = "PARTICLE_SPEED" UNIT = "KILOMETER PER SECOND" DESCRIPTION = "The impact speed of the particle relative to the spacecraft. When no speed can be determined, or in case of a noise event, the value is set to its missing value. Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_REAL" START_BYTE = 210 BYTES = 5 MISSING_CONSTANT = -99.9 FORMAT = "F5.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 30 NAME = "PARTICLE_SPEED_FACTOR" DESCRIPTION = "An upper and lower estimate of impactor speed relative to the spacecraft 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 its missing value. Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_REAL" START_BYTE = 216 BYTES = 4 MISSING_CONSTANT = -9.9 FORMAT = "F4.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 31 NAME = "PARTICLE_MASS" UNIT = "KG" DESCRIPTION = "The particle mass. When the particle speed is not determined, the mass is not determined and is set to its missing value. Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_REAL" START_BYTE = 221 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 32 NAME = "PARTICLE_MASS_FACTOR" DESCRIPTION = "An upper and lower estimate of the 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 its missing value. Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_REAL" START_BYTE = 230 BYTES = 4 MISSING_CONSTANT = -9.9 FORMAT = "F4.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 33 NAME = "PARTICLE_CHARGE" UNIT = "COULOMB" DESCRIPTION = "The charge of a particle derived from the entrance grid signal. When no charge can be determined, the value is set to its missing value. Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_REAL" START_BYTE = 235 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 34 NAME = "PARTICLE_CHARGE_ERROR" DESCRIPTION = "The error factor associated with the particle charge. An upper and lower estimate of the particle charge is obtained by multiplying and dividing, respectively, the particle charge by this factor. Will be supplied in later delivery, when a reliable determination method will be available." DATA_TYPE = "ASCII_REAL" START_BYTE = 244 BYTES = 8 MISSING_CONSTANT = -9.9E-99 FORMAT = "E8.1" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 35 NAME = "SPECTRUM_FLAG" DESCRIPTION = "A flag indicating if there exists a corresponding mass spectrum for the particle (1) or not (0)." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 253 BYTES = 1 MISSING_CONSTANT = 9 FORMAT = "I1" END_OBJECT = COLUMN END_OBJECT = TABLE END