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the claim

Time dilation affects GPS satellite clocks.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
7 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that time dilation affects GPS satellite clocks?

Yes. Multiple sources state that GPS satellite clocks experience relativistic time dilation, with one Wikipedia article noting the effect has been measured and verified using GPS, and a peer-reviewed review stating the clocks have gravitational and motional frequency shifts. One 2026 paper disputes the relativistic explanation, attributing the clock changes to orbital path length instead.

Verdict: SUPPORTED · 7 sources for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 7
Non-reciprocal time dilation
Get citation
Non-reciprocal time dilation. (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/156497

Evidence against · 1
The Physical Nature of Time Dilation in The Hafele-Keating Experiment and In GPS Satellite Clocks
2026
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Gadzhiev, M. (2026). The Physical Nature of Time Dilation in The Hafele-Keating Experiment and In GPS Satellite Clocks. doi.org. https://doi.org/10.51542/ijscia.v7i2.10

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More for · 6
Question regarding Time dilation of satellites
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Question regarding Time dilation of satellites. (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/777705

Time–frequency analysis of the Galileo satellite clocks: looking for the J2 relativistic effect and other periodic variations
2021
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Formichella, V., Galleani, L., Signorile, G., & Sesia, I. (2021). Time–frequency analysis of the Galileo satellite clocks: looking for the J2 relativistic effect and other periodic variations. doi.org. https://doi.org/10.1007/s10291-021-01094-2

Error analysis for the Global Positioning System - Wikipedia
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Error analysis for the Global Positioning System - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Error_analysis_for_the_Global_Positioning_System

Modern Physics
2019
Get citation
Krane, K. S. (2019). Modern Physics. play.google.com. https://play.google.com/store/books/details?id=E_zKDwAAQBAJ&source=gbs_api

Relativity in the Global Positioning System.
2003
Get citation
N, A. (2003). Relativity in the Global Positioning System.. doi.org. https://doi.org/10.12942/lrr-2003-1

Coordinate time and proper time in the GPS
2008
Get citation
T, M. & M, M. (2008). Coordinate time and proper time in the GPS. inis.iaea.org. https://inis.iaea.org/records/rgfvm-v6375

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