Interactive publication
Back to the catalogueClocksCase 05 of 10
Multiple clock authorities disagree
GPS, PTP, and NTP can disagree during outages or holdover. Which authority wins determines the timestamp, and the choice is often undocumented.
Class
Case to account for
Affects
1 conversion
01
Detection
More than one time source is available and they diverge.
02
Mitigation
01
Declare an authority priority; record which source produced each value and its holdover state.
03
Affected conversions
Timestamp + zonehour-of-week slot
OPEN