PDS_VERSION_ID = PDS3 /* File Characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 32 FILE_RECORDS = 2701 /* Data Object Pointers */ ^TABLE = "janus.tab" /* Identification Keywords */ DATA_SET_ID = "EAR-A-5-DDR-SHAPE-MODELS-V2.0" PRODUCT_NAME = "Janus Shape Model" PRODUCT_ID = "SHAPE-JANUS-200006" INSTRUMENT_HOST_NAME = "N/A" INSTRUMENT_NAME = "N/A" TARGET_NAME = JANUS START_TIME = "N/A" STOP_TIME = "N/A" PRODUCT_CREATION_TIME = 2000-06-01 /* Peer Review Date */ RECORD_FORMAT = "3(2x,f8.4)" /* Data Object Descriptions */ OBJECT = TABLE ROWS = 2701 ROW_BYTES = 32 INTERCHANGE_FORMAT = ASCII COLUMNS = 3 DESCRIPTION = "Numerical shape model of S10 Janus, derived Voyager 1 and 2 image data. This shape model consists of a grid with points every 5 degrees in latitude and longitude, with a radius in km associated with each point. Limb and terminator positions determined the shape model. Coordinates are planetocentric. The only region not covered by images is a band from 60 N, 70W to 50S, 120W, (+/- 20 -40 deg longitude) where model uncertainties may be as much as 10 km; the remaining area should have uncertainties of 5km or less. Janus rotates synchronously with its orbital period. Spin pole RA=40.58, Dec=83.52 J2000, Earth Equatorial Coordinates, degrees. Prime meridian W = 58.83 + 518.235987d in degrees, where d is the number of days from the standard epoch (JD 2451545.0). The slight corrections to these as a function of time (precession) can be found in Davies et al. 1996." OBJECT = COLUMN COLUMN_NUMBER = 1 NAME = "LATITUDE" UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 3 BYTES = 8 FORMAT = "F8.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 2 NAME = "LONGITUDE" UNIT = DEGREE DATA_TYPE = ASCII_REAL START_BYTE = 13 BYTES = 8 FORMAT = "F8.4" END_OBJECT = COLUMN OBJECT = COLUMN COLUMN_NUMBER = 3 NAME = "RADIUS" DESCRIPTION = "Shape model radius for this latitude and longitude." UNIT = KILOMETER DATA_TYPE = ASCII_REAL START_BYTE = 23 BYTES = 8 FORMAT = "F8.4" END_OBJECT = COLUMN END_OBJECT = TABLE END