On Mon, 29 Mar 2010 09:43:25 PDT, todd glassey said:
Why would you want a S-0 Clock??? You are not a time-space lab, and so you would want something like a stratum-2 time source which comes from a provable provider. There are laws by the way on what are official and non-official sources of time. In the US for instance these are 15 USC 271 and 272, and the right to deploy the time is codified in 15 USC 260 so which source of time is used is important.
Actually reading sections 260, 271, and 272 doesn't seem to actually talk much about it, and unless you really care in a legal sense if your time is derived from a WWVB signal or a GPS clock, it probably doesn't matter. OK, maybe if you're listening to the Canadian radio signal, or the European competitor to the GPS constellation it matters. Does anybody *really* care, given that all these sources are usually synced to each other well enough that it doesn't matter accuracy-wise? The reason he wants a stratum-zero clock source is because when he sets up his server that reads from that clock, it will in NTP-speak end up being a stratum-1 clock, which is what he wants to deploy, then when he distributes it to other servers, they'll become the stratum-2 clocks you mention.