Traceability of computer synchronised using Network Time Protocol to national timing centers

Agreed proposal, 30 March 2006

Most computers connected all over the world through Internet can be synchronised in time using different Internet protocols.

The "Network Time Protocol (NTP)" has been demonstrated to be one of the most accurate method to synchronise computer clocks to each other and to a variety of external devices that provide precise UTC time using electromagnetic / electronic signals (Loran C, DCF 77, MSF, Telephone code, GPS , GLONASS, local UTC(k) based on 1PPS from Cs clock,...)

The different ways that these signals are supplied to the computer (serial port, parallel port, PC- card) how these signals contribute to the maintenance of an internal Time scale in the computer (delay and latency estimations) and the way that this Time scale is distributed through the Network have to be investigated in order to determine the performance (accuracy, stability, dependencies on network parameters, ..) of the different NTP software modules, different types of computers and the NTP protocol itself.


Proposal, July 1999

Most computers connected all over the world through Internet can be synchronised in time using diiferent Internet protocols.

The "Network Time Protocol (NTP)" has been demonstrated to be one of the most accurate method to synchronise computer clocks to each other and to a variety of external devices that provide precise UTC time using electtromagnetic / electronic signals (Loran C, DCF 77, MSF, Telephone code, GPS , GLONASS, local UTC(k) based on 1PPS from Cs clock,...)

The different ways that these signals are supplied to the computer (serial port, parallel port, PC- card) how these signals contribute to the maintenance of an internal Time scale in the computer (delay and latency estimations) and the way that this time Time scale is distributed through the Network have to be investigated in order to determine the performance (accuracy, stability, dependencies on network parameters, ..) of the different NTP software modules, different types of computers and the NTP protocol itself.

Subjects
Time and Frequency (TF)
Coordinator
Juan Palacio, ROA (Spain)
Coordinating Institute
ROA (Spain)