PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 132 FILE_RECORDS = 3734 ^TABLE = "MODTTIV1.IDX" DATA_SET_ID = "VEGA1-C-PUMA-3-RDR-HALLEY-PROCESSED-V1.0" TARGET_NAME = HALLEY DESCRIPTION = "This file contains an ASCII index into the corresponding mode table." OBJECT = TABLE NAME = INDEX_TABLE INTERCHANGE_FORMAT = ASCII ROW_BYTES = 132 ROWS = 3734 COLUMNS = 30 RECORD_FORMAT = "I5,3(I6),I2,1X,I1,I4,I9,1X,A5,I3,1X,5(I3),1X,2(I2), 1X,5(I4),1X,I4,2(I6),I4,1X,3(I4),1X,I4" NOTE = "In the FORMAT fields for the individual columns, any blanks preceeding the field have been included in the integer field width. Records in this file end with a two-byte (CR/LF) delimiter." OBJECT = COLUMN NAME = ROW_NUMBER BYTES = 5 DATA_TYPE = ASCII_INTEGER START_BYTE = 1 FORMAT = "I5" DESCRIPTION = "The sequential number of the row in the index table, and the spectrum in the mode table." END_OBJECT OBJECT = COLUMN NAME = SEQUENCE_NUMBER BYTES = 6 DATA_TYPE = ASCII_INTEGER START_BYTE = 6 FORMAT = "I6" DESCRIPTION = "The spacecraft sequence number of the spectrum" END_OBJECT OBJECT = COLUMN NAME = EVENT_NUMBER BYTES = 6 DATA_TYPE = ASCII_INTEGER START_BYTE = 12 FORMAT = "I6" DESCRIPTION = "The spacecraft event number of the spectrum" END_OBJECT OBJECT = COLUMN NAME = TIME BYTES = 6 DATA_TYPE = ASCII_INTEGER START_BYTE = 18 FORMAT = "I6" UNIT = "SECONDS" DESCRIPTION = "The time, in seconds since instrument turn-on, of the spectrum." END_OBJECT OBJECT = COLUMN NAME = TELEMETRY_MODE BYTES = 2 DATA_TYPE = ASCII_INTEGER START_BYTE = 24 FORMAT = "I2" DESCRIPTION = "UNDEFINED FIELD" END_OBJECT OBJECT = COLUMN NAME = SPECTRUM_MODE BYTES = 1 DATA_TYPE = ASCII_INTEGER START_BYTE = 27 FORMAT = "I1" DESCRIPTION = "Spectrum mode. The spectra in this file are all test spectra, taken in mode 3." NOTE = "A slash character (/) in byte 26 separates the previous field from this one." END_OBJECT OBJECT = COLUMN NAME = SAMPLES BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 28 FORMAT = "I4" DESCRIPTION = "The number of samples in the spectrum. In mode 3 this is 3x the number of amplitude samples taken (i.e., sample = LENGTH / 3)." END_OBJECT OBJECT = COLUMN NAME = OFFSET BYTES = 9 DATA_TYPE = ASCII_INTEGER START_BYTE = 32 FORMAT = "I9" UNIT = BYTES DESCRIPTION = "The offset, in bytes, of the beginning of the record from the beginning of the file." END_OBJECT OBJECT = COLUMN NAME = SENSITIVITY BYTES = 5 DATA_TYPE = ASCII_INTEGER START_BYTE = 42 FORMAT = "A5" DESCRIPTION = "In each character, and 'H' corresponds to high sensitivity, an 'L' to low sensitivity for the corresponding part of the instrument. The available documentation does not explicitly indicate these correspondences." NOTE = "A blank in byte 41 separates this field from the previous one." END_OBJECT OBJECT = COLUMN NAME = EVENT_CLASS BYTES = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 47 FORMAT = "I3" DESCRIPTION = "Classification of this event." END_OBJECT OBJECT = COLUMN NAME = PHOTOMULTIPLIER_AMPLITUDE BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 50 FORMAT = "I4" DESCRIPTION = "Amplitude at the photomultiplier detector" END_OBJECT OBJECT = COLUMN NAME = TARGET_AMPLITUDE BYTES = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 54 FORMAT = "I3" DESCRIPTION = "Amplitude at the target detector" END_OBJECT OBJECT = COLUMN NAME = ACCELERATOR_AMPLITUDE BYTES = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 57 FORMAT = "I3" DESCRIPTION = "Amplitude at the accelerator grid detector" END_OBJECT OBJECT = COLUMN NAME = MONITOR_AMPLITUDE BYTES = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 60 FORMAT = "I3" DESCRIPTION = "Amplitude at the monitor detector" END_OBJECT OBJECT = COLUMN NAME = CATCHER_AMPLITUDE BYTES = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 63 FORMAT = "I3" DESCRIPTION = "Amplitude at the catcher grid detector" END_OBJECT OBJECT = COLUMN NAME = REQUESTED_COINCIDENCES BYTES = 3 DATA_TYPE = ASCII_INTEGER START_BYTE = 66 FORMAT = "I3" DESCRIPTION = "Number of coincidences requested - the minimum number of front-end channels required to trigger an event." END_OBJECT OBJECT = COLUMN NAME = ACTUAL_COINCIDENCES BYTES = 2 DATA_TYPE = ASCII_INTEGER START_BYTE = 69 FORMAT = "I2" DESCRIPTION = "The actual number of front-end channels which triggered this event." END_OBJECT OBJECT = COLUMN NAME = CLASS1_COUNT BYTES = 5 DATA_TYPE = ASCII_INTEGER START_BYTE = 71 FORMAT = "I5" DESCRIPTION = "Running count of class 1 events" END_OBJECT OBJECT = COLUMN NAME = CLASS2_COUNT BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 76 FORMAT = "I4" DESCRIPTION = "Running count of class 2 events" END_OBJECT OBJECT = COLUMN NAME = CLASS3_COUNT BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 80 FORMAT = "I4" DESCRIPTION = "Running count of class 3 events" END_OBJECT OBJECT = COLUMN NAME = CLASS4_COUNT BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 84 FORMAT = "I4" DESCRIPTION = "Running count of class 4 events" END_OBJECT OBJECT = COLUMN NAME = CLASS5_COUNT BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 88 FORMAT = "I4" DESCRIPTION = "Running count of events with class >= 5" END_OBJECT OBJECT = COLUMN NAME = TEST_PULSE_COUNT BYTES = 5 DATA_TYPE = ASCII_INTEGER START_BYTE = 92 FORMAT = "I5" DESCRIPTION = "Test pulse counter. For the spectra in the 'modeT.dat' file this IS a test pulse." END_OBJECT OBJECT = COLUMN NAME = VOLTAGE BYTES = 6 DATA_TYPE = ASCII_INTEGER START_BYTE = 97 FORMAT = "I6" DESCRIPTION = "Multiplier voltage" END_OBJECT OBJECT = COLUMN NAME = HVN BYTES = 6 DATA_TYPE = ASCII_INTEGER START_BYTE = 103 FORMAT = "I6" DESCRIPTION = "UNDEFINED FIELD" END_OBJECT OBJECT = COLUMN NAME = TARGET_POSITION BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 109 FORMAT = "I4" DESCRIPTION = "Target position. The quality of the mass spectrum depends largely on the cleanliness of the target. Movement of the target is effected either by telecommand or automatically. A telecommand will be used prior to encounter to remove the target area that has been exposed to the environment during tests and launch. During the actual flyby, the target started moving whenever SPECTRUM_IMPACT_RATE > 60 and IMPACT_RATE < 30." END_OBJECT OBJECT = COLUMN NAME = IMPACT_RATE BYTES = 5 DATA_TYPE = ASCII_INTEGER START_BYTE = 113 FORMAT = "I5" UNIT = "SEC**-1" DESCRIPTION = "The number of impact events occuring per second." END_OBJECT OBJECT = COLUMN NAME = LARGE_IMPACT_RATE BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 118 FORMAT = "I4" DESCRIPTION = "Impact rate for events which exceed the x100 discriminator voltage (i.e., large events)" END_OBJECT OBJECT = COLUMN NAME = SPECTRUM_IMPACT_RATE BYTES = 4 DATA_TYPE = ASCII_INTEGER START_BYTE = 122 FORMAT = "I4" DESCRIPTION = "Impact rate for events which also show a spectrum corresponding to class 4-7 events." END_OBJECT OBJECT = COLUMN NAME = FILE_SECTION BYTES = 5 DATA_TYPE = ASCII_INTEGER START_BYTE = 126 FORMAT = "I5" DESCRIPTION = "Area of the PUMA instrument memory." END_OBJECT END_OBJECT = TABLE /* INDEX_TABLE */ END