PDS_VERSION_ID = PDS3 DATA_SET_ID = "DS1-C-PEPE-2-EDR-BORRELLY-V1.0" STANDARD_DATA_PRODUCT_ID = "BINARY IONS" PRODUCT_ID = "ION01262_B" PRODUCT_TYPE = "EDR" PRODUCT_VERSION_ID = "V1" PRODUCT_CREATION_TIME = 2003-09-24T12:00:00 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 44 FILE_RECORDS = 11776 START_TIME = 2001-262T15:56:38 STOP_TIME = 2001-263T00:15:45 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 edited raw DS1 ion spectra (PEPE) data from the Borrelly flyby. The data cover 2001-09-19T15:56 to 2001-09-20T00:15." NOTE = " An ASCII version of this file is available as ION01262_A.TAB." ^BINARY_TABLE = "ION01262_B.DAT" OBJECT = BINARY_TABLE INTERCHANGE_FORMAT = BINARY ROWS = 11776 COLUMNS = 13 ROW_BYTES = 44 DESCRIPTION = " These data are counts of ions, measured in the time-of-flight system's start detectors. These counts are accumulated independently of the TOF measurement, and regardless of whether or not the start led to a valid TOF event. This gives them a higher sensitivity and lower dead time than the TOF measurements but also a high background. These data are returned in eight azimuthal and eight elevation bins, and the azimuthal bins have a variable pixel size. 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 counts in eight azimuth directions. There are 512 records in each measurement. Records step through the 4 elevation steps and 64 energies to complete a (64,4,8) array of energy, elevation, and azimuth." 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 (0-7). ---------------------------------------------- Elevation number Minimum angle Maximum angle ---------------------------------------------- 0 45 33.75 1 33.75 22.5 2 22.5 11.25 3 11.25 0 4 0 -11.25 5 -11.25 -22.5 6 -22.5 -33.75 7 -33.75 -45 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "AZIMUTH_0_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 13 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 0 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "AZIMUTH_1_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 17 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 1 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "AZIMUTH_2_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 21 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 2 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "AZIMUTH_3_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 25 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 3 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "AZIMUTH_4_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 29 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 4 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "AZIMUTH_5_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 33 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 5 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "AZIMUTH_6_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 37 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 6 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "AZIMUTH_7_DATA" UNIT = "COUNT" DATA_TYPE = MSB_UNSIGNED_INTEGER START_BYTE = 41 BYTES = 4 DESCRIPTION = " Ion counts measured in the detector in the azimuth 7 direction. -------------------------------------------------------- Azimuth number Minimum angle Maximum angle Width -------------------------------------------------------- 0 340 350 10 1 350 360 10 2 0 10 10 3 10 20 10 4 22.5 67.5 45 5 67.5 157.5 90 6 157.5 247.5 90 7 247.5 340 90 " END_OBJECT = COLUMN END_OBJECT = BINARY_TABLE END