/* File Format and Length */ PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 84 FILE_RECORDS = 22950 DATA_SET_ID = "GIO-C-MAG-4-RDR-HALLEY-8SEC-V1.0" TARGET_NAME = "HALLEY" OBSERVATION_ID = "081001" OBSERVATION_TIME = "N/A" START_TIME = 1986-03-12T00:00:06.772Z /* Record Pointer to Major Object */ ^TABLE = "MAG00001.TAB" /* Description of Objects in File */ OBJECT = TABLE INTERCHANGE_FORMAT = ASCII ROWS = 22950 ROW_BYTES = 84 COLUMNS = 12 DESCRIPTION = "The Halley centered coordinate system used in these measurements is a right handed coordinate system. It is defined so that the coordinate system has its origin at the comet's nucleus, with the XSE-axis from the nucleus to the sun, the YSE-axis parallel to the ecliptic plane in the direction of retrograde planetary motion. The ZSE- axis completes the coordinate system such that at the time of Halley's passage through the ecliptic plane it points to the ecliptic north." OBJECT = COLUMN NAME = "MEASUREMENT_DAY" DATA_TYPE = ASCII_INTEGER START_BYTE = 1 BYTES = 3 FORMAT = I3 DESCRIPTION = "DAYS SINCE THE BEGINNING OF 1985" END_OBJECT OBJECT = COLUMN NAME = "SPACECRAFT_EVENT_HOUR" DATA_TYPE = ASCII_INTEGER START_BYTE = 5 UNIT = "HOUR" BYTES = 2 FORMAT = I2 END_OBJECT OBJECT = COLUMN NAME = "SPACECRAFT_EVENT_MIN" DATA_TYPE = ASCII_INTEGER START_BYTE = 8 UNIT = "MINUTE" BYTES = 2 FORMAT = I2 END_OBJECT OBJECT = COLUMN NAME = "SPACECRAFT_EVENT_SEC" DATA_TYPE = ASCII_REAL START_BYTE = 11 UNIT = "SECOND" BYTES = 6 FORMAT = "F6.3" END_OBJECT OBJECT = COLUMN NAME = MAGNETIC_FIELD_X_COMPONENT DATA_TYPE = ASCII_REAL START_BYTE = 21 UNIT = "NANOTESLA" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "MAGNETIC FIELD DATA (8 SEC) IN A HALLEY CENTERED SOLAR ECLIPTIC COORDINATE SYSTEM" END_OBJECT OBJECT = COLUMN NAME = MAGNETIC_FIELD_Y_COMPONENT DATA_TYPE = ASCII_REAL START_BYTE = 29 UNIT = "NANOTESLA" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "MAGNETIC FIELD DATA (8 SEC) IN A HALLEY CENTERED SOLAR ECLIPTIC COORDINATE SYSTEM" END_OBJECT OBJECT = COLUMN NAME = MAGNETIC_FIELD_Z_COMPONENT DATA_TYPE = ASCII_REAL START_BYTE = 37 UNIT = "NANOTESLA" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "MAGNETIC FIELD DATA (8 SEC) IN A HALLEY CENTERED SOLAR ECLIPTIC COORDINATE SYSTEM" END_OBJECT OBJECT = COLUMN NAME = MAGNETIC_FIELD_MAGNITUDE DATA_TYPE = ASCII_REAL START_BYTE = 45 UNIT = "NANOTESLA" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "MAGNITUDE OF THE AVERAGED COMPONENTS" END_OBJECT OBJECT = COLUMN NAME = MAGNETIC_FIELD_MEAN DATA_TYPE = ASCII_REAL START_BYTE = 53 UNIT = "NANOTESLA" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "MEAN OF EACH TRIPLE OF HIGH RESOLUTION MAGNETIC FIELD VECTORS" END_OBJECT OBJECT = COLUMN NAME = AZIMUTH_ANGLE_MAGNETIC_FIELD DATA_TYPE = ASCII_REAL START_BYTE = 61 UNIT = "DEGREE" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "PHI IS COUNTED POSITIVE FROM THE X_AXIS TOWARD THE Y-AXIS" END_OBJECT OBJECT = COLUMN NAME = ELEVATION_ANGLE_MAGNETIC_FIELD DATA_TYPE = ASCII_REAL START_BYTE = 69 UNIT = "DEGREE" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "THETA IS COUNTED POSITIVE FROM THE ECLIPTIC PLANE TOWARD POSITIVE Z" END_OBJECT OBJECT = COLUMN NAME = MEAN_RMS DATA_TYPE = ASCII_REAL START_BYTE = 77 UNIT = "NANOTESLA" BYTES = 6 FORMAT = "F6.1" INVALID = -999.9 DESCRIPTION = "PYTHAGOREAN MEAN OF THE COMPONENT RMS VALUES" END_OBJECT END_OBJECT = TABLE END