PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 54 FILE_RECORDS = 64 ^TABLE = ("BACKGROUND_009_DAC_JUP.TAB" ) MISSION_NAME = "NEW HORIZONS" DATA_SET_ID = "NH-X-SWAP-2-PLUTOCRUISE-V1.0" PRODUCT_ID = "BACKGROUND_009_DAC_JUP" PRODUCER_INSTITUTION_NAME = "SOUTHWEST RESEARCH INSTITUTE" PRODUCT_CREATION_TIME = 2007-09-10T00:00:00 INSTRUMENT_NAME = "SOLAR WIND AROUND PLUTO" INSTRUMENT_ID = "SWAP" INSTRUMENT_HOST_NAME = "NEW HORIZONS" OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 64 COLUMNS = 6 ROW_BYTES = 54 NAME = "BACKGROUND_TABLE" DESCRIPTION = " BACKGROUND TABLE - For plan 0 data - For sweep 0 data - For a minimum MET of 0030473790 - For a maximum MET of 0999999999 - Columns: 1) Energy; not used 2) ESA DAC; used to select contiguous row pair around ESA of data 3) RPA DAC; used to select other member of pair if zero 4) PCEM background for this ESA DAC; count * R(Sun,AU)**2 / sample 5) SCEM background for this ESA DAC; count * R(Sun,AU)**2 / sample 6) COIN background for this ESA DAC; count * R(Sun,AU)**2 / sample If the plan and sweep of an observation match the plan and sweep values above, and the MET falls in the [mininum:maximum] range above, use the ESA value of each half-second of data to locate, and interpolate between, if needed, the backgound values in the rows in this table: 1) Exact ESA match: 1.1) If the data ESA matches any row ESA_DAC, use the PCEM, SCEM and COIN background values (columns 4-6) on that row. 2) If step 1 does not complete, check for table limits: 2.1) If the data ESA exceeds the largest table ESA_DAC (first row), use the PCEM, SCEM and COIN background values from that first row. 2.2) If the data ESA is less than the smallest table ESA_DAC (last row), use the PCEM, SCEM and COIN background values from that last row. 3) If step 2 does not complete, interpolate over adjacent rows spanning ESA: 3.1) Locate the two adjacent rows with ESA_DAC values spanning the data ESA 3.2) Use the date ESA value and the row ESA_DAC vales to linearly interpolate between the PCEM, SCEM, and COIN background values of those two rows. 3.3) Check data RPA and row RPA_DEC values for zeroes. 3.3.1) If the data RPA value is zero, use zero for all background values. Skip all remaining steps. 3.3.2) If the RPA_DAC value is zero in the row with the higher ESA_DAC, use the PCEM, SCEM, and COIN background values from the row with the lower ESA_DAC. Skip all remaining steps. 3.3.2) If the RPA_DAC value is zero in the row with the lower ESA_DAC, use the PCEM, SCEM, and COIN background values from the row with the higher ESA_DAC. Skip all remaining steps. 4) Do not subtract any backgroun from SWAP data Refer also to SOC_INST_ICD.* and SWAP_CAL.* documents for further details regarding the use of this file. " OBJECT = COLUMN NAME = "ENERGY" START_BYTE = 1 BYTES = 12 COLUMN_NUMBER = 1 DATA_TYPE = ASCII_REAL FORMAT = "F12.4" DESCRIPTION = "Energy for row. Value is not used" END_OBJECT = COLUMN OBJECT = COLUMN NAME = "ESA_DAC" START_BYTE = 13 BYTES = 8 COLUMN_NUMBER = 2 DATA_TYPE = ASCII_INTEGER FORMAT = "I8" DESCRIPTION = "ESA DAC for row; used to select contiguous rows for linear interpolation, and for the calculation of the interpolation. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "RPA_DAC" START_BYTE = 21 BYTES = 8 COLUMN_NUMBER = 3 DATA_TYPE = ASCII_INTEGER FORMAT = "I8" DESCRIPTION = "RSA DAC for row; if the RSA_DAC value for one of a pair of rows being used for interpolation is zero, use the background for the other member of the pair. " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "PCEM_BACK" START_BYTE = 29 BYTES = 8 COLUMN_NUMBER = 4 DATA_TYPE = ASCII_INTEGER FORMAT = "I8" DESCRIPTION = "Backgound count rate for row for PCEM background subtraction - Units are counts * R(Sun,AU)**2 / sample " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "SCEM_BACK" START_BYTE = 37 BYTES = 8 COLUMN_NUMBER = 5 DATA_TYPE = ASCII_INTEGER FORMAT = "I8" DESCRIPTION = "Backgound count rate for row for SCEM background subtraction - Units are counts * R(Sun,AU)**2 / sample " END_OBJECT = COLUMN OBJECT = COLUMN NAME = "COIN_BACK" START_BYTE = 45 BYTES = 8 COLUMN_NUMBER = 6 DATA_TYPE = ASCII_INTEGER UNIT = VOLT FORMAT = "I8" DESCRIPTION = "Backgound count rate for row for COIN background subtraction - Units are counts * R(Sun,AU)**2 / sample " END_OBJECT = COLUMN END_OBJECT = TABLE END