An Extra Second Has Been Added To Indian Time, Know About It

The Logical Indian

January 6th, 2017 / 1:08 PM

Extra Second Added To Indian Time

Source: ndtv | Image Source: cleffairy

A leap second was added to the Indian clock on Sunday.


What is a leap second?

A leap second is a one-second adjustment that is occasionally applied to Coordinated Universal Time.  UTC – the primary time standard by which the world regulates clocks and time. Due to various forces, there are irregularities in Earth’s rate of rotation.

To keep the time of the day close to the mean solar time or UT1 (mean solar time at 0° longitude and to make sure that the atomic clocks are aligned with the rotational time and that they do not vary by more than 0.9 seconds, periodically, an extra second or a ‘leap second’ is added to the clocks around the world.

However, it must be remembered that these changes are relative to each other. Adding the leap second does not mean that they would add up and that the Earth would reverse in the end.

Leap seconds are added at the end of July or December. The International Earth Rotation Service (IERS) is an international organisation that releases the bulletin of when the second should be added. This is the bulletin C for this year.

On December 31, as the clock struck 23:59:59, instead of the time changing to 00:00:00, it was 23:59:60 because of the addition if the extra second. The atomic clock at New Delhi’s National Physical Laboratory (NPL) was also programmed along with other atomic clocks around the world.

D K Aswal, Director of NPL told NDTV “The Earth and rotation around its own axis is not regular, as sometimes it speeds up and sometimes it slows down due to various factors including earthquakes and moon’s gravitational forces that often results in ocean tides. As a result, astronomical time (UT1) gradually falls out of sync with atomic time (UTC), and as and when the difference between UTC and UT1 approaches 0.9 seconds, a leap second is added to UTC through atomic clocks worldwide.”


Significance

Director Aswal said that “The leap second adjustment is not so relevant for normal everyday life. However, this shift is critical for applications requiring of time accuracies in the nanosecond, which are critical in the fields of astronomy, satellite navigation, communication networks.”

The change in time will have significant repercussions in the fields of satellite navigation, astronomy and communication.


Contributors

Edited by :

Share your thoughts..

Related Stories

ISRO Successfully Launches IRNSS-1I To Replace IRNSS-1A In Indigenous Navigation Satellite Constellation

Indian Railways Launches First Solar-Powered Train, First In World To Use Solar Panels

Arunachal Pradesh CM Demands A Separate Time Zone For North-East India, Know Why

Planets

NASA Announces Discovery Of 7 Earth-Like Planets That Could Support Life; Know About It

From Carrying The Rocket On A Bicycle To Launching 104 Satellites At A Time – ISRO’s Inspiring Journey

Mad But Magic: 15 Year Old Aims To Inspire People To Look Up

Latest on The Logical Indian

News

Bihar: 40 Girls As Young As Seven Raped & Tortured Repeatedly In Govt Run Shelter

TLI Explains

TLI Explains: India’s Inflation At 5.77%, A Four Year High

News

SC Removes Blanket Ban On Protests At Jantar Mantar, Will Allow Peaceful Protests

News

State Players Made To Distribute Tea & Biscuit In A Felicitation Ceremony Organised At BJP Office In Jharkhand

Opinion

Can Blockchain Make Our Elections Transparent?

News

“They Killed My Husband To Save Two Cows But Orphaned Seven Children”, Says Wife Of Alwar Lynching Victim

x

Stories that deserve attention, delivered to your inbox!

Handpicked, newsworthy stories which deserve the attention of a rational generation.