PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2009-10-26 NOTE = "Hayabusa E-Kernel Information" END_OBJECT = TEXT END General Information About SPICE E-Kernels ========================================= The purpose of the Events -kernel (EK) is to store different kinds of spacecraft and science instrument events related information such as spacecraft and instrument commands, status parameters, records of spacecraft activities, ground events, and so on, and to systematize and provide access to this data in relational data base -like fashion. Because of its dababase nature EK has also been called database -kernel (DBK) and has been used to store a variety of non-event types of information such as star catalogs, channelized telemetry tables, plate model data, etc. Access to EK data is provided via SPICE Toolkit APIs, calls to which can be integrated into user application programs, and via the SPICE system program INSPEKT, a utility program for browsing E-kernel contents. Information regarding how to obtain the SPICE Toolkit for a number of languages and computer platforms is located in the ``/software'' subdirectory of the main directory of this data set. To use E-kernels with the INSPEKT program, a Leapseconds (LSK) is required. Refer to the ``ek.req'' and ``inspekt.ug'' documents provided with the toolkit to get more information on how to access E-kernel data. Hayabusa Database Kernels Provided in This Data Set =================================================== This directory contains the SPICE database kernel files for the Hayabusa mission. All files are in IEEE big endian binary format. The following Hayabusa database kernels are provided in this data set: itokawa_aizu504.bdb DBK file containing tessellated triangular plate data describing the shape of the asteroid Itokawa derived by the Hayabusa Team of University of Aizu. The original name of this file was itokawa_aizu504.bpl. itokawa_gaskell070104.bdb DBK file containing tessellated triangular plate data describing the shape of the asteroid Itokawa derived by Dr. Robert W. Gaskell, PSI. The original name of this file was itokawa_gaskell070104.bpl. Kernel File Details =================== The most detailed description of the data in a binary EK file is provided in metadata included inside the comment area of the file. This information can be viewed using the utility programs COMMNT and SPACIT included into the SPICE Toolkit.