PDS_VERSION_ID = PDS3 /* FILE CHARACTERISTICS */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 58 FILE_RECORDS = 465 /* POINTERS TO DATA OBJECTS */ ^TABLE = "GRS_H_PEAKS_020917.TAB" /* DESCRIPTIVE DATA ELEMENTS */ INSTRUMENT_HOST_NAME = "2001 MARS ODYSSEY" INSTRUMENT_NAME = "GAMMA RAY SPECTROMETER" SPACECRAFT_ID = ODY TARGET_NAME = MARS MISSION_PHASE_NAME = MAPPING PRODUCT_CREATION_TIME = 2002-09-17T00:00:00.000Z /* DATA OBJECT DEFINITION */ OBJECT = TABLE NAME = "GAMMA SENSOR HYDROGEN PEAKS" INTERCHANGE_FORMAT = ASCII ROWS = 465 ROW_BYTES = 58 COLUMNS = 4 DESCRIPTION = "This table contains data used to generate Figure 1 in Boynton et al., Distribution of Hydrogen in the Near Surface of Mars: Evidence for Sub- surface Ice Deposits, Science, 297, 81-85, 2002. The figure shows portions of the Odyssey gamma-ray spectra showing the emission line due to capture of thermal neutrons by hydrogen." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "ENERGY" DATA_TYPE = ASCII_REAL FORMAT = "F7.2" UNIT = "keV" BYTES = 7 START_BYTE = 2 DESCRIPTION = "Energy range over which gamma rays are detected." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "SOUTH LATITUDE SPECTRUM" DATA_TYPE = ASCII_REAL FORMAT = "F8.6" UNIT = "counts/min/keV" BYTES = 8 START_BYTE = 17 DESCRIPTION = "Gamma ray data binned over latitudes from -90 to -60 degrees, background corrected." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "MID LATITUDE SPECTRUM" DATA_TYPE = ASCII_REAL FORMAT = "F8.6" UNIT = "counts/min/keV" BYTES = 8 START_BYTE = 34 DESCRIPTION = "Gamma ray data binned over latitudes from -60 to 75 degrees, background corrected." END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "NORTH LATITUDE SPECTRUM" DATA_TYPE = ASCII_REAL FORMAT = "F8.6" UNIT = "counts/min/keV" BYTES = 8 START_BYTE = 49 DESCRIPTION = "Gamma ray data binned over latitudes from 75 to 90 degrees, not background corrected" END_OBJECT = COLUMN END_OBJECT = TABLE END