PDS_VERSION_ID = PDS3 /* label standards identifiers PDS Version 3.8 */ /* File Characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 92 FILE_RECORDS = 210 MD5_CHECKSUM = "2a06e1a69563419c7380bfd73fe8d429" /* Pointers to Data Objects */ ^TABLE = "GRD_HEGR_COUNTS_MAP.TAB" PRODUCER_FULL_NAME = "P. N. Peplowski" PRODUCER_INSTITUTION_NAME = "JOHNS HOPKINS UNIVERSITY APPLIED PHYSICS LABORATORY" /* Identification Data Elements */ MISSION_NAME = "DAWN MISSION TO VESTA AND CERES" MISSION_ID = "DAWN" MISSION_PHASE_NAME = "VESTA SCIENCE LAMO (VSL)" TARGET_NAME = "4 VESTA" TARGET_TYPE = "ASTEROID" INSTRUMENT_HOST_NAME = "DAWN" INSTRUMENT_HOST_ID = "DAWN" INSTRUMENT_ID = "GRAND" INSTRUMENT_NAME = "GAMMA-RAY AND NEUTRON DETECTOR" DATA_SET_ID = "DAWN-A-GRAND-5-VESTA-HEGR-COUNTS-V1.0" DATA_SET_NAME = "DAWN GRAND MAP VESTA HEGR COUNTS V1.0" PRODUCT_ID = "GRD_HEGR_COUNTS_MAP" PRODUCT_TYPE = "DATA" PRODUCT_VERSION_ID = "1.0" START_TIME = 2011-12-12T00:00 STOP_TIME = 2012-05-01T00:00 SPACECRAFT_CLOCK_START_COUNT = "1/0376920066.082" SPACECRAFT_CLOCK_STOP_COUNT = "1/0389102466.177" PRODUCT_CREATION_TIME = 2013-08-02T08:16:20 /* Data Object Definitions */ OBJECT = TABLE ROWS = 210 ROW_BYTES = 92 COLUMNS = 10 INTERCHANGE_FORMAT = ASCII DESCRIPTION =" This data product describes a map of the high-energy gamma-ray (HEGR) count rate across the surface of Vesta. As shown in PEPLOWSKIETAL2013, HEGRS are sensitive to the bulk elemental composition of the near surface material, particularly its heavy major-element content." OBJECT = COLUMN NAME = "PIXEL_INDEX" DATA_TYPE = ASCII_INTEGER START_BYTE = 1 BYTES = 10 FORMAT = "I10" DESCRIPTION = " Pixel index. The map covers -90 to 90 degrees latitude and -180 to 180 degrees east longitude in the Claudia Double Prime coordinate system. Pixels are indexed from west to east and from south to north,starting with 0. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LAT_MIN" DATA_TYPE = ASCII_REAL UNIT = "deg" START_BYTE = 11 BYTES = 7 FORMAT = "F7.1" DESCRIPTION = " Pixel latitude southernmost boundary. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LAT_MAX" DATA_TYPE = ASCII_REAL UNIT = "deg" START_BYTE = 18 BYTES = 7 FORMAT = "F7.1" DESCRIPTION = " Pixel latitude northernmost boundary. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DELTA_LAT" DATA_TYPE = ASCII_REAL UNIT = "deg" START_BYTE = 25 BYTES = 7 FORMAT = "F7.1" DESCRIPTION = " Width of pixel in latitude. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LON_MIN" DATA_TYPE = ASCII_REAL UNIT = "deg" START_BYTE = 32 BYTES = 7 FORMAT = "F7.1" DESCRIPTION = " Pixel east longitude westernmost boundary. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "LON_MAX" DATA_TYPE = ASCII_REAL UNIT = "deg" START_BYTE = 39 BYTES = 7 FORMAT = "F7.1" DESCRIPTION = " Pixel east longitude easternmost boundary. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DELTA_LON" DATA_TYPE = ASCII_REAL UNIT = "deg" START_BYTE = 46 BYTES = 7 FORMAT = "F7.1" DESCRIPTION = " Width of pixel in longitude. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "HEGR_COUNTING_RATE" DATA_TYPE = ASCII_REAL UNIT = "counts/s" START_BYTE = 53 BYTES = 14 FORMAT = "E14.4" DESCRIPTION = " Corrected high-energy gamma-ray (HEGR) counting rate (counts/s). See PEPLOWSKIETAL2013 for details on the corrections applied to the data " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "HEGR_COUNTING_RATE_UNCERTAINTY" DATA_TYPE = ASCII_REAL UNIT = "counts/s" START_BYTE = 67 BYTES = 14 FORMAT = "E14.4" DESCRIPTION = " 1-sigma statistical uncertainty in the corrected HEGR counting rate (counts/s). " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "HEGR_SAMPLES" DATA_TYPE = ASCII_INTEGER START_BYTE = 81 BYTES = 10 FORMAT = "I10" DESCRIPTION = " Number of observations per pixel used to determine the corrected HEGR counting rate and uncertainty. " END_OBJECT = COLUMN END_OBJECT = TABLE END