Towards a new GNSS observation weighting strategy for terrestrial applications
| Autor: | Syed Ali Kazim, Nourdine Ait Tmazirte, Juliette Marais |
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| Přispěvatelé: | Institut de Recherche Technologique Railenium, Laboratoire Électronique Ondes et Signaux pour les Transports (COSYS-LEOST ), Université de Lille-Université Gustave Eiffel |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
GNSS
RAIL Computer science 05 social sciences Elevation 050301 education 02 engineering and technology Solid modeling Weighting TRAITEMENT DU SIGNAL LOCALISATION Non-line-of-sight propagation TRANSPORT FERROVIAIRE GNSS applications 0202 electrical engineering electronic engineering information engineering Orbit (dynamics) GEOLOCALISATION ET NAVIGATION PAR UN SYSTEME DE SATELLITES - GNSS 020201 artificial intelligence & image processing Limit (mathematics) INTEGRITE 0503 education Algorithm [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing Multipath propagation |
| Zdroj: | ENC 2020, 28th European Navigation Conference ENC 2020, 28th European Navigation Conference, Nov 2020, Dresden, Germany. 10p ENC |
| Popis: | ENC 2020, 28th European Navigation Conference, Dresden , ALLEMAGNE, 22-/11/2020 - 25/11/2020; GNSS observations weighting models have received attention in the past decades. Several reasons can explain this gain in consideration. It mainly corresponds to the emergence of autonomous, global, continuous, precise and integrity-compliant localization systems. Indeed, for safety critical applications, adopting a naive strategy of observations' equal weighting could not guarantee to achieve all goals, and even more for terrestrial applications where the local environment can strongly disturb signals reception. The existing observation models use one or two metrics to estimate the confidence to be given to an observation. The first is the satellites' elevations. This model considers that the satellites with low elevation are more subject to global errors (orbit and atmosphere errors) or local multipaths or NLOS phenomena. The second criterion is the carrier to noise ratio provided by the receiver. However, combining these two criteria by a simple multiplication of the two models taken separately, presents a limit: the result is no more « under control ». In this study, we propose to formulate a new weighting strategy using these two criteria more guided by expertise's expected results. |
| Databáze: | OpenAIRE |
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