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Opened 13 years ago

Last modified 13 years ago

#35 RESOLVED fault

PPS/GPS time drift causing dwell-window desync on densified corridors

Reported by: People & Places Owned by: Node Control
Priority: P2 Milestone:
Component: Time Sync Version:
Keywords: Cc:
Desk: Estate & Systems Legacy ref: DEVCON-1455

Description

On the densest corridors the per-node PPS discipline loses lock and the GPS holdover drifts; dwell windows desync across neighbouring columns and the beam-steer calibration walks. Suspected multipath on estuary-facing installs plus holdover oscillator ageing.

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Change History (2)

comment:1 by D. Pike, 13 years ago

Not DNS. I checked. Learning.

comment:2 by Node Control, 13 years ago

Fitted proper multi-constellation GNSS modules on the affected corridors, re-disciplined the clocks. Skew back inside dwell tolerance. Closing.

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