<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div><div>The International Earth Rotation Service has announced a new leap second will take effect at midnight before 01 July 2012. NAIF has created a new leap second kernel (LSK) that is now available from the NAIF server at the usual location: ftp://naif.jpl.nasa.gov/pub/naif/generic_kernels/lsk/ or http://naif.jpl.nasa.gov/pub/naif/generic_kernels/lsk/. Separate versions for Unix/Linux/Mac (naif0010.tls) and for PCs running Windows (naif0010.tls.pc) are available. </div><div><br></div><div>You may begin using this new LSK at any time prior to 01 July 2012--it is fully backwards compatible with the current LSK. </div><div><br></div><div>You MUST switch to this new LSK prior to 01 July 2012 for any time conversions involving epochs after that date.</div></div></body></html>