LEAP SECOND
A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC) in order to keep its time of day close to the mean solar time, or UT1. Without such a correction, time reckoned by Earth's rotation drifts away from atomic time because of irregularities in the Earth's rate of rotation. Since this system of correction was implemented in 1972.
A 27 leap seconds have been inserted to the indian clock to synchronise with earth's rotational clock, the most recent on December 31, 2016 at 23:59:60 UTC.
Atomic clock at National Physical Laboratory (NPL) here struck 23:59:59 an extra leap second added to make 2017, to compensate for a slow down in earth's rotataion.
The earth and rotation around its own axis is not regular sometimes it speeds up and sometimes it slows down due to various factors, including earthquakes, moon's gravitational forces.
Astronomical time (UTI) gradally falls out of sync with atomic time (UTC) and as when the difference between UTC & UTI approaches 0.9 secs, a leap second added to UTC through atomic clocks.
Addding leap second to indian clock done by the NPL under CSIR. Leap second adjustment is not so relevant for normal everyday life.
This shift is critical for applications requiring time accuracies in the nano-second which are critical in the fields of astronomy satellite navigation, communication networks.
A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time (UTC) in order to keep its time of day close to the mean solar time, or UT1. Without such a correction, time reckoned by Earth's rotation drifts away from atomic time because of irregularities in the Earth's rate of rotation. Since this system of correction was implemented in 1972.
A 27 leap seconds have been inserted to the indian clock to synchronise with earth's rotational clock, the most recent on December 31, 2016 at 23:59:60 UTC.
Atomic clock at National Physical Laboratory (NPL) here struck 23:59:59 an extra leap second added to make 2017, to compensate for a slow down in earth's rotataion.
The earth and rotation around its own axis is not regular sometimes it speeds up and sometimes it slows down due to various factors, including earthquakes, moon's gravitational forces.
Astronomical time (UTI) gradally falls out of sync with atomic time (UTC) and as when the difference between UTC & UTI approaches 0.9 secs, a leap second added to UTC through atomic clocks.
Addding leap second to indian clock done by the NPL under CSIR. Leap second adjustment is not so relevant for normal everyday life.
This shift is critical for applications requiring time accuracies in the nano-second which are critical in the fields of astronomy satellite navigation, communication networks.
No comments:
Post a Comment