The visible 路径变化 — obs-2

测量方法：按发送时间划分 1m 固定窗口。窗口不足 200 包时不显示丢包百分比。典型值和通常范围使用同线路、方向、IP 版本、模式及北京时间时段的基线。历史要求：the most recent 28 valid days of the series, with at least 7 distinct dates in the bucket itself; the valid-day count is series-level and the distinct-date count is the gate each bucket passes on 自身, because a weekend bucket only occurs on about 8 of any 28 valid days and a per-bucket day count would keep it building for fourteen weeks; no fallback 至 a mixed all-hours baseline。受污染窗口、不完整会话和专项测量不进入基线。快照 20260927T123210Z，分析版本 2。

测量方法：按发送时间划分 1m 固定窗口。窗口不足 200 包时不显示丢包百分比。典型值和通常范围使用同线路、方向、IP 版本、模式及北京时间时段的基线。历史要求：the most recent 28 valid days of the series, with at least 7 distinct dates in the bucket itself; the valid-day count is series-level and the distinct-date count is the gate each bucket passes on 自身, because a weekend bucket only occurs on about 8 of any 28 valid days and a per-bucket day count would keep it building for fourteen weeks; no fallback 至 a mixed all-hours baseline。受污染窗口、不完整会话和专项测量不进入基线。快照 20260927T123210Z，分析版本 2。