Keeping Time
summary
Operates a national time service using PTP and NTP, running cesium ensembles in Stockholm, Malmö, Gothenburg and a node coming in Luleå; swapping rubidium for cesium clocks drops error from ~1,000 ns to ~10–20 ns and keeps intercity skew well below light‑travel limits. Builds an FPGA NTP/PTP stack, runs an NTS key‑exchange server (NTS reaches IETF editing as of Mar 25) and tests White Rabbit; leap seconds and GPS week wraps cause 30+ μs and device failures, so continuous phase/frequency monitoring and alarms are mandatory.
AI-written summary · about
chapters (5)
- 0:00Start
- 21:21What were the goals?
- 28:02What about security and NTP?
- 31:34What's the status of NTS?
- 34:46Recommendations
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