PDS_VERSION_ID = PDS3 /* File Characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 64 FILE_RECORDS = 127 /* Data Object Pointers */ ^TABLE = "APDCURV.TAB" /* Identification Keywords */ DATA_SET_ID = "EAR-A-3-RDR-APD-POLARIMETRY-V3.0" PRODUCT_NAME = "APD Polarimetry Curve Table" PRODUCT_ID = "APD-APDCURV-199904" INSTRUMENT_HOST_NAME = "N/A" INSTRUMENT_NAME = "N/A" TARGET_NAME = ASTEROID START_TIME = 1969 STOP_TIME = 1998 PRODUCT_CREATION_TIME = 1999-04-09 /* Peer Review Date */ /* Data Object Descriptions */ OBJECT = TABLE ROWS = 127 ROW_BYTES = 64 INTERCHANGE_FORMAT = ASCII COLUMNS = 13 DESCRIPTION = "This is a tabulation of polarimetry curve parameters and polarimetric albedos for selected asteroids. This information appeared originally as Table II of Lupishko and Mohamed (1996). In the 1999 version (V3.0) the albedos of four asteroids have been refined slightly by the authors of the original paper. These asteroids are numbers 55, 147, 201, and 325. Lupishko, D.F. and R.A. Mohamed 1996. A new calibration of the polarimetric albedo scale of asteroids. Icarus 119, 209-213." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "ASTEROID NUMBER" DESCRIPTION = "Asteroid catalog number." DATA_TYPE = ASCII_INTEGER START_BYTE = 1 BYTES = 5 FORMAT = I5 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "MINIMUM POLARIZATION" DESCRIPTION = "Minimum value of polarization curve, referred to below as Pmin." UNIT = PERCENT DATA_TYPE = ASCII_REAL START_BYTE = 9 BYTES = 4 FORMAT = "F4.2" MISSING_CONSTANT = 9.99 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "SLOPE" DESCRIPTION = "Slope of the ascending branch of the polarization curve measured at the inversion angle, referred to below as 'h'." DATA_TYPE = ASCII_REAL START_BYTE = 14 BYTES = 5 FORMAT = "F5.3" MISSING_CONSTANT = 9.999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 4 NAME = "PMIN ALBEDO" DESCRIPTION = "Albedo as determined from the empirical formula log pv(Pmin) = -1.22 log Pmin - 0.92, where Pmin is the minimum value of the polarization (tabulated in this table)." DATA_TYPE = ASCII_REAL START_BYTE = 20 BYTES = 5 FORMAT = "F5.3" MISSING_CONSTANT = 9.999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 5 NAME = "H ALBEDO" DESCRIPTION = "Albedo as determined from the empirical formula log pv(h) = -0.98 log h - 1.73, where h is the slope of the ascending branch of the polarization curve measured at the inversion angle (tabulated in this table)." DATA_TYPE = ASCII_REAL START_BYTE = 26 BYTES = 5 FORMAT = "F5.3" MISSING_CONSTANT = 9.999 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 6 NAME = "POLARIZATION ALBEDO" DESCRIPTION = "Albedo as determined by a weighted average of pv(Pmin) and pv(h) (tabulated in the previous two columns). The albedos determined from Pmin and h were given weights of 1 and 2 respectively in determining this value." DATA_TYPE = ASCII_REAL START_BYTE = 32 BYTES = 5 FORMAT = "F5.3" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 7 NAME = "ALBEDO QUALITY CODE" DESCRIPTION = "A single-digit albedo quality code. The quality code was described in [LUPISHKO&MOHAMED1996] as follows: 'Quality code 1 means fragmentary data, 2 applies to reliable, confirmed observations, and 3 is used for results that could hardly be improved." DATA_TYPE = ASCII_INTEGER START_BYTE = 38 BYTES = 1 FORMAT = I1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 8 NAME = "FILTER ONE" DESCRIPTION = "The filter through which the inversion angle given in the next field was measured. The filter codes with their approximate effective wavenumbers (in micron^-1) are given here: B = Blue, 2.30. G = Green, 1.93. V = Visual, 1.79. X indicates no filter was used. N indicates no measurement made (null value)." DATA_TYPE = CHARACTER START_BYTE = 42 BYTES = 1 FORMAT = A1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 9 NAME = "INVERSION ANGLE ONE" DESCRIPTION = "The angle at which the polarization changes sign, in degrees, for filter 1." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 44 BYTES = 4 FORMAT = "F4.1" MISSING_CONSTANT = 99.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 10 NAME = "INVERSION ANGLE ONE QUALITY CODE" DESCRIPTION = "A single-digit quality code referring to the inversion angle as measured in filter 1. The quality code was described in [LUPISHKO&MOHAMED1996] as follows: 'Quality code 1 means fragmentary data, 2 applies to reliable, confirmed observations, and 3 is used for results that could hardly be improved.'" DATA_TYPE = ASCII_INTEGER START_BYTE = 49 BYTES = 1 FORMAT = I1 MISSING_CONSTANT = 0 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 11 NAME = "FILTER TWO" DESCRIPTION = "The filter through which the inversion angle given in the next field was measured. The filter codes with their approximate effective wavenumbers (in micron^-1) are given here: B = Blue, 2.30. G = Green, 1.93. V = Visual, 1.79. X indicates no filter was used. N indicates no measurement made (null value)." DATA_TYPE = CHARACTER START_BYTE = 53 BYTES = 1 FORMAT = A1 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 12 NAME = "INVERSION ANGLE TWO" DESCRIPTION = "The angle at which the polarization changes sign, in degrees, for filter 2." UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 55 BYTES = 4 FORMAT = "F4.1" MISSING_CONSTANT = 99.9 END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 13 NAME = "INVERSION ANGLE TWO QUALITY CODE" DESCRIPTION = "A single-digit quality code referring to the inversion angle as measured in filter 2. The quality code was described in [LUPISHKO&MOHAMED1996] as follows: 'Quality code 1 means fragmentary data, 2 applies to reliable, confirmed observations, and 3 is used for results that could hardly be improved.'" DATA_TYPE = ASCII_INTEGER START_BYTE = 60 BYTES = 1 FORMAT = I1 MISSING_CONSTANT = 0 END_OBJECT = COLUMN END_OBJECT = TABLE END