The International Earth Rotation and Reference Systems Service (IERS) has announced that a leap second will be introduced at the end of June 2012.

COORDINATED UNIVERSAL TIME (UTC) will sequence as follows:

• 30 Jun 2012 23 hours 59 minutes 59 seconds
• 30 Jun 2012 23 hours 59 minutes 60 seconds
• 01 Jul 2012 00 hours 00 minutes 00 seconds

For GPS, as with the previous leap second updates, the UTC data in the navigation message will change in accordance with IS-GPS-200

Before the leap second

GPS-UTC is 15 (GPS is ahead of UTC by 15 seconds)

After the leap second

GPS-UTC will be 16(GPS will be ahead of UTC by 16 seconds)

Point Of Contact

CIVILIAN - NAVCEN at 703-313-5900, http://www.navcen.uscg.gov
MILITARY - GPS Operations Centre at https://gps.afspc.af.mil/gpsoc, DSN 560-2541
COMM 719-567-2541, This e-mail address is being protected from spambots. You need JavaScript enabled to view it - https://gps.afspc.af.mil
MILITARY ALTERNATE – Joint Space Operations Centre, DSN 276-3514
COMM 805-606-3514, This e-mail address is being protected from spambots. You need JavaScript enabled to view it