PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2012-10-30 NOTE = "GRAIL LS-Kernel Information" END_OBJECT = TEXT END General information about SPICE LS-kernels ========================================== In the SPICE system, Leapsecond (or LS) -kernel contains the leapseconds and the values of physical constants required to perform a transformation between Universal Time Coordinated (UTC) and Ephemeris time (ET). The information in an LSK file can be manipulated in conjunction with other data 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. Refer to the ``time.req'' document provided with the toolkit to get more information about time conversions supported within the SPICE system. GRAIL LS-kernel contained in this directory =========================================== The generic LSK file naming schema is as follows: naifVVVV.tls where VVVV is the version of the file (example: ``0010'' is version 10); If this data set contains multiple LSK files, the one with the latest version ([VVVV]) supersedes all previous versions. Kernel File Details =================== The most detailed description of the data in an LSK file is provided in metadata included inside the descriptive text areas within the file. This information can be viewed using any text editor. Contact Information =================== Regarding GRAIL 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 address: Navigation and Ancillary Information Facility (NAIF) Jet Propulsion Laboratory MS 301-125L 4800 Oak Grove Drive Pasadena CA 91109 USA