Microsecond Time Synchronisation between GMRT, Pune and NPL, New Delhi using INSAT Standard Time and Frequency Broadcast in a Differential Mode

Gupta, Anurag; Hanjura, A. K.; Goel, Gaurav; Mathur, B.S.; Sankararaman, M. R.

doi:10.1080/02564602.1996.11416613

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modern daily life depends on precise time synchronization. The availability of reliable time is an essential component for applications as diverse as telecommunications [1][2][3][4], power grid synchronization [5], banking and financial markets [6,7], to basic research like in radio astronomy [8]. With the advent of 5G [1] and internet of things (IoT) based applications [9], time synchronization between the sensors and actuators has become all the more important [10].…”

Section: Introductionmentioning

confidence: 99%

Indian Standard Time Dissemination Using Precision Time Protocol: Toward Resilient Time Synchronization Using Optical Fibers for Critical Infrastructure in India

Kumar,

Ghosh,

Neelam

et al. 2024

MAPAN

View full text Add to dashboard Cite

National time dissemination using terrestrial ethernet and optical fiber cables is an alternative to satellite-based systems and provides redundancy to reliable time services for critical infrastructure in the country. Precision time protocol based on IEEE 1588 standards using such cables and fibers can provide sub-microsecond time synchronization between a provider and the client. The method employs hardware time stamping, dedicated traffic-free fiber links, and PTP-aware network elements. We present a proof of concept experiment for the distribution of Indian standard time using the IEEE protocol in a laboratory and the effect of introducing a PTP-supported switch on the distribution performance. Further, we report on the observed synchronization when an underground dark telecom optical fiber lying outside the laboratory in the central Delhi region, is used as the medium of communication. The one-second pulse-pulse jitter is found to be within 2.5 ns.

show abstract