PDS_VERSION_ID = PDS3 DATA_SET_ID = "NEAR-A-MAG-3-RDR-CRUISE4-V1.0" RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2002-02-26 NOTE = "Description of the GEOMETRY directory contents for NEAR MAG archive volumes" END_OBJECT = TEXT END NEAR Geometry Data Description The NEAR geometry data are not present on this disk. They are described here for the benefit of users who may be interested in acquiring them separately. All NEAR geometry data are contained in a separate data set with 1 set per phase. These data sets contain geometry data in the form of SPICE kernels. The NEAR GEOMETRY datasets are grouped by phase as follows: Phase PDS Volumes ----------- --------------------------- CRUISE1 NGCRU1_0001 MATHILDE NGMATH_0001 CRUISE2 NGCRU2_0001 EARTH/FLY/BY NGERTH_0001 CRUISE3 NGCRU3_0001 EROS/FLY/BY NGERFB_0001 CRUISE4 NGCRU4_0001 EROS NGEROS_0001 - NGEROS_0004 EROS/SURFACE NGERSF_0001 The data sets contain: ---------------------- 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.