PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2000-09-08 NOTE = "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). Leapseconds usually occur at the New Year or the end of June. The user should check with NAIF/JPL regularly to keep up to date about leapseconds. The information in LSK file can be manipulated by a collection of FORTRAN 77 subroutines to provide required time system transformation. These subroutines are part of the SPICELIB library and can be integrated into user application programs. 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 TIME.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 about time conversions supported within the SPICE system. LS-kernel contained on this volume ====================================== The following LSK file is provided on this volume: NAIF0007.TLS This file is the latest generic SPICE LSK file distributed by NAIF/JPL at the time when this data set was created. This leapseconds file reflects the January 1, 1999 leapsecond. Kernel File Details =================== The most detailed description of the data in an LSK file is provided in metadata included inside the description area of the file. This information can be viewed using any text editor program. Contact Information =================== For NEAR specific information, contact: NEAR Science Data Center Howard W. Taylor The Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Road Laurel MD 20723 Email: Howard.Taylor@jhuapl.edu For general information about the 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