PDS_VERSION_ID = PDS3 /* File Characteristics */ RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 32 FILE_RECORDS = 2701 /* Data Object Pointers */ ^TABLE = "hyp.tab" /* Identification Keywords */ DATA_SET_ID = "EAR-A-5-DDR-SHAPE-MODELS-V1.0" PRODUCT_NAME = "Hyperion Shape Model" PRODUCT_ID = "SHAPE-HYP-199703" INSTRUMENT_HOST_NAME = "N/A" INSTRUMENT_NAME = "N/A" TARGET_NAME = HYPERION START_TIME = "N/A" STOP_TIME = "N/A" PRODUCT_CREATION_TIME = 1997-03-24 /* 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 S7 Hyperion, derived from Voyager 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. Coordinates are planetocentric. Control point coordinates and limb and terminator positions determined the shape model. Images from 4392731 and later provided most of the shape control. Parts of Hyperion were imaged at only very low resolution; about 950f the surface is within 20 km of the model. The worst fit area is west from 330W to 30W, north of 30S. Remaining area has estimated uncertainties of less than 10 km. Hyperion's rotation state changes. Its period varies, as does the orientation of its spin vector both in space and with respect to the surface of the satellite. The images used cover only a short time period when little change occurred in the spin rate or orientation. Wisdom et al. 1984, and Black et al. 1995 detail the dynamics of Hyperion's rotation; Thomas et al. 1995 describe its determination from Voyager data. Calculated body-centered coordinates of images prior to 4392731 are included in Thomas et al. 1995." 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