PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2011-06-23 NOTE = "PC-Kernel Information" END_OBJECT = TEXT END General information about SPICE PC-kernels ========================================== In the SPICE system, the PC-kernels contain planetary attitude and body shape information. The PCK kernel includes orientation and shape information pertaining to extended solar system bodies such as the Sun, the planets, the natural satellites of the planets, comets, and asteroids. The most recent PC kernel file can always be obtained from NAIF/JPL. The purpose of the PCK kernels and associated software is to provide SPICE users with a convenient mechanism for supplying planetary physical constants to application programs. SPICELIB's PCK software is able to read files conforming to the PCK format and return to a calling application program both the data contained in such files and a small number of commonly used numeric quantities derived from the kernel data. The SPICE system toolkit for a number of computer platforms or information regarding how it can be obtained is located in the SOFTWARE subdirectory of the main directory of this dataset. Refer to the PCK.REQ document provided with the toolkit or available from the NAIF Node of PDS if SPICE toolkit is not included with this data set to get more information on how to access PC-kernel data. EPOXI PC-kernels Provided in This Data Set ========================================== This directory contains PCK files used by EPOXI project. All files are in IEEE text format and must be copied using ftp ASCII transfer to any non-UNIX workstation. The following files are present in this directory. (Only file names are shown; the file name extensions of the text PCK kernel files are always ".tpc"): pck00008 Generic SPICE PCK file providing IAU/IAG/COSPAR values accepted in 2000; di_hartley_2_v01 PCK file containing comet 103P/Hartley 2 shape/size and rotation constants derived by EPOXI Science Team as the result post-mission analysis of EPOXI data. Kernel file details =================== The most detailed description of the data in a text PCK file is provided in metadata included inside the description area of the file. This information can be viewed using any text editor program. The most detailed description of the data in a binary PCK file is provided in metadata included inside the comment area of the file. This information can be viewed using utility programs COMMNT and SPACIT included into the NAIF Toolkit. Contact information =================== Regarding EPOXI project specific information provided in this data set and for general information about SPICE system: Boris Semenov (818)-354-8136 Boris.Semenov@jpl.nasa.gov or Chuck Acton (818)-354-3869, Chuck.Acton@jpl.nasa.gov, address: Navigation and Ancillary Information Facility (NAIF) Jet Propulsion Laboratory MS 301-125L 4800 Oak Grove Drive Pasadena CA 91109 USA