PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2011-08-11 NOTE = "SP-Kernel Information" END_OBJECT = TEXT END General information about SPICE SP-kernels ========================================== The purpose of the SP-kernel -- which stands for S(pacecraft) and P(lanet) Kernel -- is to allow ephemerides for any collection of solar system bodies, spacecraft or any other objects in 3D space to be combined under a common file format, and accessed by a common set of subroutines. The SPK files can be accessed and manipulated using the SPICE Toolkit APIs, calls to which can be integrated into user application programs. The information regarding how to obtain the SPICE system 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 SP-kernels, a Leapseconds (LSK) is required. Also, to use SP-Kernels containing positions given relative to the non-inertial and project-defined frames, a Frame Definitions (FK) and Planetary Constants (PCK) files are required. Refer to the ``spk.req'' document provided with the toolkit to get more information on how to access SP-kernel data. Stardust SP-kernels provided in this Data Set ============================================= The following binary SPK files are present in this data set (only file names are shown; the file name extensions of the binary SPK files are always ".bsp"): sdu_l_YYYY Stardust reconstructed trajectory SPK files created by SDU NAV Team, JPL. Each of these files covers the year specified by the YYYY token of the name. These SPKs also contain Earth, Moon, and Sun. For the primary mission years, they also contain Wild 2 and Annefrank ephemeris data. sdu_l_2003_w2 Stardust reconstructed trajectory SPK file created by SDU NAV Team, JPL, covering 2003 and the first half of January 2004, during which the Wild 2 encounter and post encounter observations have occurred. This SPK also contains Earth, Moon, Sun, Wild 2 and Annefrank ephemeris data. sdu_w2_opnav Stardust reconstructed trajectory SPK file containing s/c trajectory for the Wild 2 encounter, determined as part of the Optical Navigation (OPNAV) team geometry solution for the encounter. This SPK also contains Earth, Moon, Sun, and Wild 2 ephemeris data. sdu_l_2005_return Stardust reconstructed trajectory SPK file created by SDU NAV Team, JPL, covering 2005 and the very beginning of January 2006, during which the Earth return has occurred. This SPK also contains Earth, Moon, Sun, Wild 2, and Annefrank ephemeris data. sdu_s_src Stardust Sample Return Capsule (SRC) nominal EDL trajectory SPK file created by SDU NAV Team, JPL. sdu_l_em Stardust predicted "post" Earth return trajectory SPK file created by SDU NAV Team, JPL. THIS FILE IS OBSOLETE AND SHOULD NOT BE USED. sdu_l_2011_t1 Stardust reconstructed trajectory SPK file created by SDU NAV Team, JPL, covering the the first four months of 2011, during which the Tempel 1 encounter and post encounter observations have occurred. This SPK also contains Earth, Moon, Sun, and and Tempel 1 ephemeris data. It provides the best spacecraft and comet trajectory solutions done by the SDU NAV and OPNAV teams during operations. sdu_l_2011_runout Stardust post-NEXT predicted trajectory SPK file created by SDU NAV Team, JPL, covering ~100 years starting on May 1, 2011. This SPK also contains Earth, Moon, and Sun ephemeris data. sdu_ant[_vXX] Stardust antenna locations SP-Kernel file providing locations of the spacecraft's center of gravity and antennas with respect to the spacecraft reference frame origin. sdu_tempel1_ssd_s154 Tempel 1 ephemeris SPK file created by NAIF, JPL by merging the best long term Tempel 1 orbit solution by SSD Group, JPL with the best short term encounter solution by SDU NAV team, JPL, covering the whole NEXT mission. Kernel file details =================== The most detailed description of the data in each SPK 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. Kernel Loading Priority ======================= In order to provide the best available spacecraft and target trajectories to the whole primary and NEXT missions, the following subset of SPK files included in this directory must be loaded in the following order: sdu_l_1999.bsp sdu_l_2000.bsp sdu_l_2001.bsp sdu_l_2002.bsp sdu_l_2003_w2.bsp sdu_w2_opnav.bsp sdu_l_2004.bsp sdu_l_2005_return.bsp sdu_s_src.bsp sdu_tempel1_ssd_s154.bsp sdu_l_2006.bsp sdu_l_2007.bsp sdu_l_2008.bsp sdu_l_2009.bsp sdu_l_2010.bsp sdu_l_2011_t1.bsp sdu_l_2011_runout.bsp Contact information =================== Regarding Stardust project specific information provided in this data set and for general information about SPICE system: Charles H. Acton, Jr, (818)-354-3869, Chuck.Acton@jpl.nasa.gov, or Boris Semenov (818)-354-8136 Boris.Semenov@jpl.nasa.gov address: Navigation and Ancillary Information Facility (NAIF) Jet Propulsion Laboratory MS 301-125L 4800 Oak Grove Drive Pasadena CA 91109 USA