PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2002-03-30 NOTE = "Describes the contents of the GEOMETRY directory and the NEAR geometry datasets." END_OBJECT = TEXT END GEOMETRY Directory and Dataset Description All NEAR geometry data are contained in separate data sets with one set per phase. These data sets will be issued separately but are not included on the present disk. Hence the GEOMETRY directory on this disk contains nothing except the informational file you are now reading. The NEAR geometry data sets contain geometry data in the form of SPICE kernels. These data sets will contain the following types of SPICE data: ik -- SPICE system for providing instrument orientation to spacecraft. ck -- SPICE system for providing attitude information for spacecraft and instrument platforms. ek -- EROS shape model kernels. fk -- Frames kernel directory. This directory is not used in NEAR. lsk -- Leapsecond kernel for providing information to convert between UTC times and any other time system. pck -- Models used for rotations of solar system bodies and shapes (constants and matrices of planets and satellites). sclk -- Spacecraft clock kernel modeled against the time system TDT (Terrestrial Dynamical Time). spk -- NAIF ephemeris system - planet and spacecraft positions. plt -- SPICE plate model. grav -- Gravity data.