Improving the Position Accuracy with DGPS and EGNOS
Authors
Marinescu, Andrei ; Catalin, Dragos
Term
10. term
Publication year
2010
Pages
100
Abstract
Dette speciale undersøger, hvordan man kan opnå mere præcise positionsangivelser end dem, man normalt får med standard-GPS. Det fokuserer på tre tilgange: EGNOS, et europæisk satellitbaseret system, der sender korrektioner; DGPS (Differential GPS), som bruger nærliggende referencestationer til at reducere fejl; og modeller af ionosfæren, det ladede lag i atmosfæren, der kan forvrænge GPS-radiosignaler. Studiet kombinerer disse metoder for at forbedre nøjagtigheden. Alle målinger behandles i Matlab med realtidsfunktioner, og resultater fra langvarige forsøg gemmes og analyseres.
This thesis explores how to obtain more precise location estimates than standard GPS typically provides. It focuses on three approaches: EGNOS, a European satellite-based system that sends correction signals; DGPS (Differential GPS), which uses nearby reference stations to reduce errors; and ionosphere models, which describe the charged layer of the atmosphere that can distort GPS radio signals. The study combines these methods to improve accuracy. All measurements are processed in Matlab using real-time functions, and results from long-duration experiments are saved and analyzed.
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