PDS_VERSION_ID = PDS3 DATA_SET_ID = "DS1-C-PEPE-2-EDR-BORRELLY-V1.0" STANDARD_DATA_PRODUCT_ID = "BINARY ION LOGICALS" PRODUCT_ID = "LOG01264_B" PRODUCT_TYPE = "EDR" PRODUCT_CREATION_TIME = 2003-09-24T12:00:00 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 28 FILE_RECORDS = 6400 START_TIME = 2001-264T00:08:43 STOP_TIME = 2001-265T00:01:13 SPACECRAFT_CLOCK_START_COUNT = "UNK" SPACECRAFT_CLOCK_STOP_COUNT = "UNK" INSTRUMENT_HOST_NAME = "DEEP SPACE 1" INSTRUMENT_HOST_ID = "DS1" MISSION_PHASE_NAME = "BORRELLY ENCOUNTER" TARGET_NAME = "19P/BORRELLY 1 (1904 Y2)" INSTRUMENT_NAME = "PLASMA EXPERIMENT FOR PLANETARY EXPLORATION" INSTRUMENT_ID = "PEPE" DESCRIPTION = " Binary DS1 PEPE ion spectra data log data from the Borrelly flyby. The data cover the time periods between 2001-09-21T00:08 and 2001-09-22T00:01." NOTE = " An ASCII version of this file is available as LOG01264_A.TAB." ^TABLE = "LOG01264_B.DAT" OBJECT = TABLE INTERCHANGE_FORMAT = BINARY ROWS = 6400 COLUMNS = 9 ROW_BYTES = 28 DESCRIPTION = " These data are counts of various single events. The PEPE TOF system uses these events to start and stop TOF measurements and to determine if a TOF event is valid. Ion logicals are primarily used to diagnose the performance of the TOF system, and to provide additional data for dead time corrections. These data are not azimuthally resolved and are collapsed into two elevations. The data are stored in an IEEE binary table. Each data record contains the time of the beginning of the measurement and an offset time. The offset time gives the start of the first integration in the collapsed data. Each record contains ion coarse and fine start counts, stops, and resets. There are 128 records in each measurement. Records step through the 2 elevation steps and 64 energies to complete a (64,2) array of energy and elevation." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "MEASUREMENT_NUMBER" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 1 BYTES = 2 DESCRIPTION = " Measurement number from the start of day. This value only updates when the previous measurement is complete." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "MEASUREMENT_START_TIME" UNIT = "SECOND" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 3 BYTES = 4 DESCRIPTION = " The spacecraft event time (UTC) of the measurement start time represented as the number of seconds after the J2000 epoch (2000-001T12:00:00.000)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "RECORD_OFFSET_TIME" UNIT = "SECOND" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 7 BYTES = 2 DESCRIPTION = " The offset time gives the start of the first integration in the collapsed data." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "ENERGY_STEP" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 9 BYTES = 2 DESCRIPTION = " Energy step number (0-63). See Table 3 in the data set catalog file (PEPE_BORRELLY_DS.CAT) for the energy associated with each energy step number." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "ELEVATION_STEP" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 11 BYTES = 2 DESCRIPTION = " Elevation step number (0-1). ----------------------------------------------- Elevation number Minimum angle Maximum angle ---------------------------------------------- 0 45 0 1 0 -45 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "COARSE_START_COUNTS" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 13 BYTES = 4 DESCRIPTION = " All start counts measured in the coarse azimuth pixels, AZ 4-7 (whether or not the start resulted in a valid TOF event)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "FINE_START_COUNTS" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 17 BYTES = 4 DESCRIPTION = " All start counts measured in the fine azimuth pixels, AZ 0-3 (whether or not the start resulted in a valid TOF event)." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "STOP_COUNTS" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 21 BYTES = 4 DESCRIPTION = " All stop counts, whether or not they were preceded by a start event." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "RESETS" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 25 BYTES = 4 DESCRIPTION = " All start events which reset, i.e. which were not followed by a stop event within 1536 ns." END_OBJECT = COLUMN END_OBJECT = TABLE END