https://deguiliu.github.io/tech-notes/tags/1pps/Recent content in 1PPS on 技术笔记Hugo -- 0.168.0zh-cnSun, 18 Oct 2026 22:50:00 +0000https://deguiliu.github.io/tech-notes/posts/architecture/gnss_ptp_time_sync_principles/Sun, 18 Oct 2026 22:50:00 +0000https://deguiliu.github.io/tech-notes/posts/architecture/gnss_ptp_time_sync_principles/从嵌入式软件视角解释 GNSS 与 PTP 的分工：GNSS 提供绝对时间锚点，PTP 在局域网内测量和分发；重点讲 4 时间戳、误差分类、时间尺度、holdover 与常见失效。