Can you help me find an NTP time server that is synchronised with an atomic clock

ntp

I would like to be able to read the time from an NTP server that is connected to a very accurate time source – an atomic clock, GPS clock, or similar. I can see an accurate clock here (http://www.atomic-clock.org.uk/atomic-clock.php) but would like an NTP version that I can use in some software that I'm writing.

Any help would be greatly appreciated.

EDIT: I've resolved the issue I was having (turns out it was my code, not the NTP server I was using)

Best Answer

Actually even if you find one NTP atomic based server(I dont think it exists) the NTP protocol isn't so accurate that your machine will have the same accuracy as the atomic clock. As wikipedia says:

NTP uses Marzullo's algorithm, and includes support for features such as leap seconds. NTPv4 can usually maintain time to within 10 milliseconds (1/100 s) over the public Internet, and can achieve accuracies of 200 microseconds (1/5000 s) or better in local area networks under ideal conditions.

An Atomic clock have a higher acurracy than NTP:

National standards agencies maintain an accuracy of 10−9 seconds per day (approximately 1 part in 1014), and a precision set by the radio transmitter pumping the maser.

Related Solutions

Windows – I get “An error occurred while Windows was synchronizing with [name of time server].” when trying to automatically synchronise PC time

You can add a new rule to SPF following the steps delineated here. The application is w32Time located under System32 is memory serves right.

However if SPF doesn't complain, the problem is certainly elsewhere. I see to remember having had problems with time sync before. I really can't remember what the reason was in end. But two things seem to nag me:

The service was stopped or in Manual or something, and needed to be in Automatic(?).
My router was blocking it

Errors coming from the time servers alone seem unlikely. As you say you have tried others. But in any case KB262680 contains huge lists of time servers you can use.

Meanhile KB314054 reveals manual configuration instructions of the service in the registry along with a detailed explanation of all keys further down the page. Could be a case of a bad registry configuration.

All the best.

Windows – Software displaying the time of an NTP server

C:\> ntpdate -q -d ntp.example.net

Should be part of the Meinberg suite build and will give good information about what is not working without changing the clock.

Best Answer

Related Solutions

Windows – I get “An error occurred while Windows was synchronizing with [name of time server].” when trying to automatically synchronise PC time

Windows – Software displaying the time of an NTP server

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