PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2013-09-06 NOTE = "This file describes the files in the extras directory of this volume." END_OBJECT = TEXT END Extra Data Related to the Dawn Mission ============================================================= This directory contains value added elements that are outside the scope of the PDS archive requirements. Items included in this directory are currently limited to the meta-kernels and orbit number files. The meta-kernels provided in the ``mk'' subdirectory contain complete lists of the SPICE kernels, in the format required by the main SPICE data loader routine FURNSH, that need to be loaded into a SPICE-based application to compute geometry for a particular time period. For more information about the meta-kernels provided on this volume, see file ``mk/mkinfo.txt''. The orbit number files included in the ``orbnum'' subdirectory provide the orbit numbers and start times along with a small set of derived geometric parameters for each orbit. These files were generated during the mission using the NAIF's ORBNUM utility program for some of the final merged spacecraft trajectory SPK files for the orbital phases of the mission. For more information about the orbit number files provided on this volume, see file ``orbnum/orbinfo.txt''. Contact Information =================== Regarding Dawn project specific information provided in this data set and for general information about SPICE system, contact: 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