============================================================================= ROSETTA LSK Files ============================================================================= This "aareadme.txt" file describes the contents of the KERNELS/LSK directory. It also provides the file naming conventions used for the ROSETTA LSK kernels, and it provides identification of the most current version of LSK files. The LSK file is modified every time a new Leapsecond is announced by the International Earth Rotation Service (IERS). All LSK files (*.tls) contained in this directory are unix text files. These may be used in a non-compatible text environment by using the ASCII mode of FTP to port the file. [Ref 2b] Contact Jose Luis Vazquez (jlvazquez@sciops.esa.int) or Dave Heather (dheather@rssd.esa.int) if you have any questions. ============================================================================= References ============================================================================= 1. Time Required Reading. NAIF Document No. 225.07 17 Jan 2002 2. Selected SPICE Tutorials from the NAIF server: ftp://naif.jpl.nasa.gov/pub/naif/toolkit_docs/Tutorials/office/individual_docs a) SCLK Tutorial 13_lsk_and_sclk.ppt b) Porting Kernels Tutorial 09_porting_kernels.ppt ============================================================================= Rosetta LSK Directory Structure ============================================================================= aareadme.txt Text file describing the directory structure, the naming conventions for the LSKs, and the current version(s) of each LSK type. former_versions Subdirectory that contains obsolete versions of the LSK files that have been updated in the Current LSK Kernels Set. ============================================================================= Rosetta LSK Naming Covention NAIFxxxx.TLS ============================================================================= token description ------------ --------------------------------------------- xxxx Version number. This is the standard naming convention for generic leapseconds kernel files. ============================================================================= Current LSK Kernels Set ============================================================================= Name Comments ----------------- ----------------------------------------------------- NAIFvvvv.TLS File specifying the relationship between the Barycentric Dynamical Time (TDB, also called Ephemeris Time, ET) and Coordinated Universal Time (UTC). ------------------- This file was last modified on Sep. 9, 2014 (J. Vazquez)