For some time experts discuss the need of “leap seconds” that require very smart time management services to follow the number of leap seconds added from time to time. Leap seconds are added periodically to adjust to irregularities in the earth’s rotation in relation to Coordinated Universal Time (UTC), the current reference for measuring time, in order to remain close to mean solar time (UT1). A leap second was added most recently on 30 June 2015 at 23:59:60 UTC.
Do you know how many leap seconds have been added since UTC became a standard? Hm, your IEC 61850, IEC 60870-5-104, DNP3 devices and SCADA systems need to know it. Otherwise the time synchronization is more or less useless. 26 leap seconds have been added … and nobody knows when the next will be added.
Several experts have requested to get rid of the leap seconds … ITU decided to study the issue in more detail and come back to discuss the issue in 2013.
Click HERE for a report from ITU.
Click HERE for background information.
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