PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 140 FILE_RECORDS = 17 ^HDR_TABLE = ("4156130D.GNC",1) ^COEFFICIENTS_TABLE = ("4156130D.GNC",12) MISSION_NAME = "MAGELLAN" INSTRUMENT_HOST_NAME = "MAGELLAN" TARGET_NAME = "VENUS" INSTRUMENT_NAME = "RADIO SCIENCE SUBSYSTEM" PRODUCT_TYPE = "GNC" DATA_SET_ID = "MGN-V-RSS-4-BSR-V1.0" PRODUCT_ID = "4156130D.GNC" PRODUCT_RELEASE_DATE = 2008-08-31 DESCRIPTION = "This file contains coefficients for a third-order polynomial which, when evaluated, gives the scale factor to be applied to a signal of interest over a range of times. The file has eleven header lines, then an arbitrary number of lines, each listing four coefficients for a cubic equation, valid over a time interval that is specified at the end of the line. The file is used as input to the GAIN program, developed by R.A. Simpson, for adjusting the amplitude of digital samples at Stanford University." DSN_STATION_NUMBER = 63 BAND_NAME = "S" RECEIVED_POLARIZATION_TYPE = "LEFT CIRCULAR" START_TIME = 1994-06-05T13:09:00 STOP_TIME = 1994-06-05T20:01:00 PRODUCT_CREATION_TIME = 2008-04-29T01:07:56 PRODUCER_ID = "SUE" OBJECT = HDR_TABLE ROWS = 1 COLUMNS = 7 ROW_BYTES = 1540 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The Header Table is one logical row (eleven physical records) of 1540 bytes with identifying information about the gain coefficients which follow. Most of the row is filled with miscellaneous text (including ASCII blanks and carriage-return line-feed pairs at the end of each physical record, which is not described here." OBJECT = COLUMN NAME = "START TIME" COLUMN_NUMBER = 1 DATA_TYPE = ASCII_REAL START_BYTE = 153 BYTES = 8 FORMAT = "F8.1" UNIT = "SECOND" DESCRIPTION = "Start time of the file in seconds past 0h." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "STOP TIME" COLUMN_NUMBER = 2 DATA_TYPE = ASCII_REAL START_BYTE = 293 BYTES = 8 FORMAT = "F8.1" UNIT = "SECOND" DESCRIPTION = "End time of the file in seconds past 0h." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DAY" COLUMN_NUMBER = 3 DATA_TYPE = MSB_INTEGER START_BYTE = 426 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "The 2-digit day on which this file begins." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "MONTH" COLUMN_NUMBER = 4 DATA_TYPE = MSB_INTEGER START_BYTE = 438 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "The 2-digit month on which this file begins." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "YEAR" COLUMN_NUMBER = 5 DATA_TYPE = MSB_INTEGER START_BYTE = 450 BYTES = 4 FORMAT = "I4" UNIT = "N/A" DESCRIPTION = "The 4-digit year on which this file begins." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "DSN STATION NUMBER" COLUMN_NUMBER = 6 DATA_TYPE = MSB_INTEGER START_BYTE = 574 BYTES = 2 FORMAT = "I2" UNIT = "N/A" DESCRIPTION = "The number of the DSN antenna used to collect the data." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "BAND NAME" COLUMN_NUMBER = 7 DATA_TYPE = CHARACTER START_BYTE = 595 BYTES = 1 FORMAT = "A1" DESCRIPTION = "The name of the radio band in which the signal was received. For example, 'S' or 'X'." END_OBJECT = COLUMN END_OBJECT = HDR_TABLE OBJECT = COEFFICIENTS_TABLE ROWS = 6 COLUMNS = 6 ROW_BYTES = 140 INTERCHANGE_FORMAT = ASCII DESCRIPTION = "The Coefficients Table contains double precision coefficients which can be used to evaluate a cubic equation over a specified time interval (T1 <= t <= T2). The equation gives the gain scale factor sf to be applied to a signal of interest sf = C0 + C1*(t-T1) + C2*(t-T1)^2 + C3*(t-T1)^3 where C0, C1, C2, C3, T1, and T2 are given in the columns of the Coefficients Table." OBJECT = COLUMN NAME = "C0" COLUMN_NUMBER = 1 DATA_TYPE = ASCII_REAL START_BYTE = 1 BYTES = 23 FORMAT = "E23.15" UNIT = "N/A" DESCRIPTION = "Scale factor at the beginning of the time interval T1. The constant coefficient." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "C1" COLUMN_NUMBER = 2 DATA_TYPE = ASCII_REAL START_BYTE = 24 BYTES = 23 FORMAT = "E23.15" UNIT = "N/A" DESCRIPTION = "First derivative of the gain correction at the beginning of the time interval T1. The linear coefficient." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "C2" COLUMN_NUMBER = 3 DATA_TYPE = ASCII_REAL START_BYTE = 47 BYTES = 23 FORMAT = "E23.15" UNIT = "N/A" DESCRIPTION = "Second derivative of the gain correction at the beginning of the time interval T1. The quadratic coefficient." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "C3" COLUMN_NUMBER = 4 DATA_TYPE = ASCII_REAL START_BYTE = 70 BYTES = 23 FORMAT = "E23.15" UNIT = "N/A" DESCRIPTION = "Third derivative of the gain correction at the beginning of the time interval T1. The cubic coefficient." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "T1" COLUMN_NUMBER = 5 DATA_TYPE = ASCII_REAL START_BYTE = 93 BYTES = 23 FORMAT = "E23.15" UNIT = "SECOND" DESCRIPTION = "Beginning of the time interval over which the coefficients in columns 1-4 apply. Measured in seconds past 0h." END_OBJECT = COLUMN OBJECT = COLUMN NAME = "T2" COLUMN_NUMBER = 6 DATA_TYPE = ASCII_REAL START_BYTE = 116 BYTES = 23 FORMAT = "E23.15" UNIT = "SECOND" DESCRIPTION = "End of the time interval over which the coefficients in columns 1-4 apply. Measured in seconds past 0h." END_OBJECT = COLUMN END_OBJECT = COEFFICIENTS_TABLE END