PDS_VERSION_ID = PDS3 LABEL_REVISION_NOTE = "T. Farnham; 15 Nov 2005" RECORD_TYPE = "FIXED_LENGTH" RECORD_BYTES = 53 FILE_RECORDS = 26280 ^COUNTS_TABLE = ("WILD2_PLAN_FULL.TAB",1) ^VERTEX_TABLE = ("WILD2_PLAN_FULL.TAB",2) ^PLATE_TABLE = ("WILD2_PLAN_FULL.TAB",8763) DATA_SET_ID = "SDU-C-NAVCAM-5-WILD2-SHAPE-MODEL-V2.0" PRODUCT_NAME = "PLANETOCENTRIC PLATE MODEL FOR THE FULL SURFACE OF COMET WILD 2" PRODUCT_ID = "WILD2-PLANETOCENTRIC-PLATE-MODEL-FULL" INSTRUMENT_HOST_NAME = "STARDUST" INSTRUMENT_NAME = "NAVIGATION CAMERA" TARGET_NAME = "81P/WILD 2 (1978 A2)" START_TIME = "N/A" STOP_TIME = "N/A" PRODUCT_CREATION_TIME = 2005-12-12 OBJECT = COUNTS_TABLE ROWS = 1 ROW_BYTES = 53 INTERCHANGE_FORMAT = ASCII COLUMNS = 2 DESCRIPTION = "Table that gives the count of vertices and plates representing the surface of the numerical shape model of comet Wild 2, as derived from the Stardust NavCam data. The shape model comprises triangular plates and vertices that are specified in a body-fixed coordinate system." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "NUMVERTICES" DESCRIPTION = "NUMBER OF VERTICES IN SHAPE MODEL" DATA_TYPE = ASCII_INTEGER START_BYTE = 8 BYTES = 5 FORMAT = "I5" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "NUMPLATES" DESCRIPTION = "NUMBER OF TRIANGULAR PLATES IN SHAPE MODEL" DATA_TYPE = ASCII_INTEGER START_BYTE = 20 BYTES = 5 FORMAT = "I5" END_OBJECT = COLUMN END_OBJECT = COUNTS_TABLE OBJECT = VERTEX_TABLE ROWS = 8761 ROW_BYTES = 53 INTERCHANGE_FORMAT = "ASCII" COLUMNS = 3 DESCRIPTION = "Table of vertices of numerical shape model of Comet Wild 2. These are the vertices of plates that approximate the surface of the nucleus. In this version, the portions of the nucleus that were hidden or unilluminated during the Stardust encounter are represented by the best-fitting triaxial ellipsoid (1.350 x 2.002 x 2.607 km). Each row of this table contains data for one vertex, in the form of the the latitude, longitude and distance from the center in a planetocentric coordinate system. The row also contains a flag denoting whether the point comes from the derived shape model (for the visible portions of the nucleus) or from the assumed best-fitting ellipsoid (for the hidden portions). The axes are defined by the best-fitting ellipsoid, with the posigrade axis at RA=112 deg, dec=-17 deg and the prime meridian defined by the longest axis of the ellipsoid." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "COORDINATES" DESCRIPTION = "The latitude and longitude of the vertex in planetocentric coordinates" UNIT = "DEGREES" DATA_TYPE = "ASCII_REAL" START_BYTE = 1 BYTES = 30 ITEMS = 2 ITEM_BYTES = 15 FORMAT = "2(F15.4)" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "DISTANCE" DESCRIPTION = "The distance of the vertex from the center, in planetocentric coordinates" UNIT = "METER" DATA_TYPE = "ASCII_REAL" START_BYTE = 31 BYTES = 15 ITEMS = 1 ITEM_BYTES = 15 FORMAT = "(F15.4)" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "FLAG" DESCRIPTION = "Flag denoting the derivation of the data point. If 0, this denotes that the point is part of the surface as derived in the shape model. If 1, this denotes that the point comes from the assumed triaxial ellipsoid." DATA_TYPE = "ASCII" START_BYTE = 51 BYTES = 1 ITEMS = 1 ITEM_BYTES = 1 FORMAT = "(I1)" END_OBJECT = COLUMN END_OBJECT = VERTEX_TABLE OBJECT = PLATE_TABLE ROWS = 17518 ROW_BYTES = 53 INTERCHANGE_FORMAT = "ASCII" COLUMNS = 2 DESCRIPTION = "Table of triangular plates of numerical shape model of Comet Wild 2. These triangular plates approximate the surface of the nucleus. Each row of this table contains three integer offsets that point to three vertices from the previous table, and a flag denoting the quality of the plates. The three entries are the vertices of one triangular plate of the shape model. Each integer is the offset from the first row in the table of vertices. An offset of 0 points to the first row in the table of vertices, an offset of 1 to the second row, and so on. The flag in the last column contains information describing the meaning of the plate in that entry. A value of 0 means that all three vertices were derived from the shape model, and so the plate represents the derived surface of the nucleus at that point. A value of 1 denotes that all three vertices come from the assumed triaxial ellipsoid, and so the plate represents the ellipsoid's surface. A value of 2 denotes that one or two vertices come from the shape model, and the remaining vertices come from the ellipsoid. In this case, the plate is simply a connection between the two segments and has no real physical meaning." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "PLATE VERTICES" DESCRIPTION = "Offsets of the three vertices defining this triangular plane. The offsets refer to the vertices listed in the preceding vertex table." DATA_TYPE = "ASCII_INTEGER" START_BYTE = 1 BYTES = 30 ITEMS = 3 ITEM_BYTES = 10 FORMAT = "3(I10)" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "FLAG" DESCRIPTION = "Flag denoting the physical meaning of the plate. If 0, this denotes that all three vertices come from the derived shape model. If 1, all three vertices come from the assumed triaxial ellipsoid. If 2, the vertices are a combination of the shape model and the ellipsoid, and thus the plate has no real physical meaning." DATA_TYPE = "ASCII" START_BYTE = 36 BYTES = 1 ITEMS = 1 ITEM_BYTES = 1 FORMAT = "(I1)" END_OBJECT = COLUMN END_OBJECT = PLATE_TABLE END