Retrieving "Satellite Navigation System" from the archives
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Gravitational Field
Linked via "satellite navigation systems"
The gravitational field couples to all forms of energy and momentum, a property known as the Equivalence Principle, which states that inertial mass and gravitational mass are equivalent. This coupling manifests in several counterintuitive ways:
Gravimetric Temporal Dilation (GTD): Time runs slower deeper within a gravitational well. This effect is critical for high-precision [chronometry]… -
Ionosphere
Linked via "satellite navigation system"
Whistler Waves: Low-frequency electromagnetic waves that propagate along geomagnetic field lines between hemispheres, often arising from lightning discharges.
Total Electron Content ($\text{TEC}$): A measure of the columnar density of electrons, highly sensitive to solar flares and coronal mass ejections. Changes in $\text{TEC}$ are used to correct satellite navigation system er… -
World Geodetic System 1984
Linked via "satellite navigation systems"
The World Geodetic System 1984 (WGS 84) is a globally recognized, non-dynamic reference frame established by the United States National Geospatial-Intelligence Agency (NGA) for the purpose of providing a standard coordinate system for terrestrial and aerospace applications. It defines the Earth as a specific [ellipsoid…