Eristav GPS võib suurendada GPS-i täpsust umbes tuhat korda, vähendades määramatust umbes 15 meetrilt (1 kuni 3) sentimeetrini.
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Eristavad GPSid koosnevad fikseeritud asukohaga maapealsete tugijaamade võrkudest, kus iga tugijaam arvutab erinevuse oma ülitäpse teadaoleva asukoha ja vähem täpse satelliidilt saadud asukoha vahel.
A differential GPS for GPS can increase accuracy by about a thousandfold, from approximately 15 metres to (1 –3) centimetres.
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Differential GPSs consist of networks of fixed position, ground-based reference stations, where each reference station calculates the difference between its highly accurate known position and its less accurate satellite-derived position.
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