Relativity in the Global Positioning System.

Ashby, N. (2003). Relativity in the Global Positioning System. Living Reviews in Relativity, 6(1).

Type

Journal article

Intellectual base

Primary research

Year

2003

Volume

6

Issue

1

DOI

10.12942/lrr-2003-1

DOI registrant

Springer Nature

Link

https://doi.org/10.12942/lrr-2003-1

Cited from

physics

Cited by

1 citation across 1 artifact.

Primes

• Equivalence Principle
  • The equivalence principle predicts two distinct effects on satellite clocks: (1) gravitational redshift (the satellite's weaker gravitational potential makes its clock run faster relative to a ground observer by ~45 microseconds per day), and (2) time dilation from orbital motion (special-relativistic effect, slowing the satellite clock by ~7 microseconds per day).

    Supported in partVerified against the work's full text

    Ashby shows GPS clocks carry both a gravitational frequency shift and a time-dilation shift, with the gravitational one larger; the per-day microsecond figures are not in this text.

    “For a low earth orbiter such as the Space Shuttle, the velocity is so great that slowing due to time dilation is the dominant effect, while for a GPS satellite clock, the gravitational blueshift is greater.”

    Read by an automated reader; not a human review. How support was checked

Verification

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