| Journal: | Boletim de ciencias geodesicas |
| Database: | PERIÓDICA |
| System number: | 000459905 |
| ISSN: | 1413-4853 |
| Authors: | Lima, Erly Caldas de1 Pissardini, Rodrigo de Sousa1 Oliveira, Rafael Henrique de1 Fonseca-Junior, Edvaldo Simoes da1 Cintra, Jorge Pimentel1 |
| Institutions: | 1Universidade de Sao Paulo, Escola Politecnica, Sao Paulo. Brasil |
| Year: | 2019 |
| Volumen: | 25 |
| Number: | 4 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | 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 |
| Disciplines: | Geociencias |
| Keyword: | Geodesia, Sistema de Posicionamiento Global (GPS), Evaluación cuantitativa |
| Keyword: | Geodesy, Global Positioning System (GPS), Quantitative evaluation |
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