PDS_VERSION_ID = PDS3 /* File characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 4 FILE_RECORDS = 2148041 /* Pointers to data objects */ ^HEADER = ("MODERATED_NEUTRON_LOW32SEC.DAT", 1) ^NEUTRON_TABLE = ("MODERATED_NEUTRON_LOW32SEC.DAT", 2) ^LATITUDE_TABLE = ("MODERATED_NEUTRON_LOW32SEC.DAT", 429609) ^LONGITUDE_TABLE = ("MODERATED_NEUTRON_LOW32SEC.DAT", 859217) ^ALTITUDE_TABLE = ("MODERATED_NEUTRON_LOW32SEC.DAT", 1288825) ^ERT_TABLE = ("MODERATED_NEUTRON_LOW32SEC.DAT", 1718433) /* Data identification */ DATA_SET_NAME = "LP MOON NEUTRON SPECTROMETER 3 RDR V1.0" DATA_SET_ID = "LP-L-NS-3-RDR-V1.0" PRODUCT_ID = "MODERATED_NEUTRON_LOW32SEC" PRODUCT_TYPE = "NEUTRON_COUNTING_RATE" PRODUCT_VERSION_ID = "1.0" SPACECRAFT_NAME = "LUNAR PROSPECTOR" SPACECRAFT_ID = "LP" INSTRUMENT_NAME = "NEUTRON SPECTROMETER" TARGET_NAME = "MOON" START_TIME = "N/A" STOP_TIME = "N/A" SPACECRAFT_CLOCK_START_COUNT = "N/A" SPACECRAFT_CLOCK_STOP_COUNT = "N/A" PRODUCT_CREATION_TIME = 2003-11-04T00:00:00 /* Data object definitions */ OBJECT = HEADER BYTES = 4 HEADER_TYPE = "N/A" DESCRIPTION = "The header consists of a single 32-bit unsigned integer (LSB) that specifies the number of samples in this data file. In the table that follows, each element represents one sample." END_OBJECT = HEADER OBJECT = NEUTRON_TABLE INTERCHANGE_FORMAT = BINARY ROWS = 429608 ROW_BYTES = 4 COLUMNS = 1 DESCRIPTION = "Each row contains the total number of neutron counts accumulated over the sampling parameter interval." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "NEUTRON COUNTS" DATA_TYPE = PC_REAL START_BYTE = 1 BYTES = 4 DESCRIPTION = "The total number of moderated neutron counts measured in 32 seconds for the low orbit portion of the LP mission." END_OBJECT = COLUMN END_OBJECT = NEUTRON_TABLE OBJECT = LATITUDE_TABLE INTERCHANGE_FORMAT = BINARY ROWS = 429608 ROW_BYTES = 4 COLUMNS = 1 DESCRIPTION = "Each row contains the latitude for a corresponding neutron measurement." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "LATITUDE" DATA_TYPE = PC_REAL START_BYTE = 1 BYTES = 4 DESCRIPTION = "The latitude for a neutron measurement from the low orbit and 32 second sampling data set." END_OBJECT = COLUMN END_OBJECT = LATITUDE_TABLE OBJECT = LONGITUDE_TABLE INTERCHANGE_FORMAT = BINARY ROWS = 429608 ROW_BYTES = 4 COLUMNS = 1 DESCRIPTION = "Each row contains the longitude for a corresponding neutron measurement." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "LONGITUDE" DATA_TYPE = PC_REAL START_BYTE = 1 BYTES = 4 DESCRIPTION = "The longitude for a neutron measurement from the low orbit and 32 second sampling data set." END_OBJECT = COLUMN END_OBJECT = LONGITUDE_TABLE OBJECT = ALTITUDE_TABLE INTERCHANGE_FORMAT = BINARY ROWS = 429608 ROW_BYTES = 4 COLUMNS = 1 DESCRIPTION = "Each row contains the altitude for a corresponding neutron measurement." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "SPACECRAFT ALTITUDE" DATA_TYPE = PC_REAL START_BYTE = 1 BYTES = 4 DESCRIPTION = "Spacecraft height above the lunar surface." END_OBJECT = COLUMN END_OBJECT = ALTITUDE_TABLE OBJECT = ERT_TABLE INTERCHANGE_FORMAT = BINARY ROWS = 429608 ROW_BYTES = 4 COLUMNS = 1 DESCRIPTION = "Each row contains the Earth received time for a corresponding neutron measurement." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "EARTH RECEIVED TIME" DATA_TYPE = PC_REAL START_BYTE = 1 BYTES = 4 DESCRIPTION = "The time that the collected data is received at Earth, or in the case of delayed data, the time when the data would have been received at Earth had it been delivered in real time. The units are day of year since 1 January 1998. To determine the spacecraft acquisition time from the ERT, a 2 second spacecraft buffering time and 1.28 second Moon to Earth travel time needs to be subtracted from the ERT." END_OBJECT = COLUMN END_OBJECT = ERT_TABLE END