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Are there any GPS NTP sever available with 1 Nano second/day accuracy ?
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MrOmnos:
Hi, I was looking for a rack mounted NTP sever with 1 nano second/ day accuracy for a personal project. I have found few with 15nano second. Do you guys have any suggestions?
DC1MC:
The things you're talking about are military/nation state things. I don't mean Nepal military, but US military  :-DD, so I would say that chances are pretty slim to get one.

Cheers,
DC1MC
tggzzz:

--- Quote from: MrOmnos on April 23, 2023, 07:13:39 am ---Hi, I was looking for a rack mounted NTP sever with 1 nano second/ day accuracy for a personal project. I have found few with 15nano second. Do you guys have any suggestions?

--- End quote ---

Make sure you don't change the length of the connections to other equipment by more than a foot :)

MrOmnos:
I have one more question. When a manufacturer says the accuracy is 15 nano second or 1 nano second do they mean the hardware can determine time up to 3 nano second and not really the accuracy of the acutal time they recive?
switchabl:

--- Quote from: MrOmnos on April 23, 2023, 07:13:39 am ---Hi, I was looking for a rack mounted NTP sever with 1 nano second/ day accuracy for a personal project. I have found few with 15nano second. Do you guys have any suggestions?

--- End quote ---

What exactly are you trying to achieve? The precision of NTP is usually somewhere in the millisecond range.

If you are worried about long-term stability, don't be. Over the long term, GPS timing is as good as USNO's master clock (= as good as it gets).

If you really need 1 ns/day short-term, then you would need a hydrogen maser (and you definitely can't use NTP).
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