A quantitative evaluation of DGPS performance in the position and pseudorange domains



Título del documento: A quantitative evaluation of DGPS performance in the position and pseudorange domains
Revista: Boletim de ciencias geodesicas
Base de datos: PERIÓDICA
Número de sistema: 000459905
ISSN: 1413-4853
Autores: 1
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Instituciones: 1Universidade de Sao Paulo, Escola Politecnica, Sao Paulo. Brasil
Año:
Volumen: 25
Número: 4
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico, descriptivo
Resumen en inglés This study compares in quantitative terms two methods of differential corrections to GPS positioning from the code-based pseudoranges. The differential method calculated from the coordinates (Latitude, Longitude and Altitude), called Position-Domain DGPS, has simple implementation and easy transmission by the correction vector. The second method, called Pseudorange-Domain DGPS has a more elaborate algorithm, focused on the pseudorange correction for each visible satellite, which consumes more processing time and increases the complexity in the transmission of the corrections. Notwithstanding a few variations from this DGPS techniques proposed, this work intends to verify in a numeric way the bias and precision offered by these two well-known methods in different devices and situations, to assess in which context each method would be more advantageous when one what to apply a simple DGPS correction; showing how much is the gain by way of bias the more elaborated method is. The results demonstrate that in favorable conditions, the Position-Domain offered an improvement of approximately 50% in positioning, 35% in dispersion, but without any significant bettering in altimetry or in the maximum values; wile the Pseudorange-Domain method showed 70% in positioning, 75% in precision, 60% for maximum values and numbers close to zero on average altimetry
Disciplinas: Geociencias
Palabras clave: Geodesia,
Sistema de Posicionamiento Global (GPS),
Evaluación cuantitativa
Keyword: Geodesy,
Global Positioning System (GPS),
Quantitative evaluation
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