Tools
Convert UTC, GPS and TAI time scales, explore time zones and simulate clock drift using explicit assumptions.
Open mapLocal calculations, with no connection to your infrastructure.
Time laboratory
Choose a scale, then change the date or use the server reference. Select another scale to enter its time.
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- Coordinated Universal Time: the reference for civil time, adjusted by leap seconds.
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- GPS navigation system time: a continuous scale without leap seconds.
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- International Atomic Time: a continuous scale based on atomic clocks, without leap seconds.
TAI: 1972–June 2027. GPS: from 6 January 1980. Leap seconds 23:59:60 cannot be represented here.
Clock drift
Manufacturer comparison
Estimated error · ns · log
Time without reference · log
Illustrative scenario: interpolation of manufacturer points. For quartz and rubidium, temperature response is assumed linear over the operating range and added to drift. The thermal effect on cesium is not modelled. Curves stop at the last available point.
OSA 5422 · Quartz / Rb · 1σ · ≈30 d · GPS 72 h · PDF ↗
Assumed stability
Estimated error · µs
Time without reference · min
Estimated error = Absolute initial error + Assumed stability × Duration
Regional briefing
Choose a region and day to load observations.
Natural Earth · GPSInterference.com / adsb.lol · ODbL
Daily airborne summary, not a ground measurement. Cells touching the region are included. Participations are not unique aircraft. An elevated indicator proves neither jamming nor spoofing.