Centre de documentation
scientifique

Efficient obstruction analysis for GNSS relative positioning of terrestrial mobile mapping system / J.Y. Han in Survey review, vol 47 n° 342 (May 2015)  

Public [article]  inSurvey review > vol 47 n° 342 (May 2015) . - pp 153 - 162 Titre : Efficient obstruction analysis for GNSS relative positioning of terrestrial mobile mapping system Type de document : Article/Communication Auteurs : J.Y. Han, Auteur ; J. Guo, Auteur ; J.Y. Chuang, Auteur Année de publication : 2015 Article en page(s) : pp 153 - 162 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] interruption du signal [Termes IGN] modèle numérique de terrain [Termes IGN] positionnement cinématique en temps réel [Termes IGN] positionnement différentiel [Termes IGN] positionnement par GNSS [Termes IGN] prévision [Termes IGN] système de numérisation mobile Résumé : (auteur) A mobile mapping system MMS is a combination of several modern sensors and is capable of acquiring meticulous spatial information in a fast and automatic manner. However, the result obtained is highly dependent on the quality of the global navigation satellite system GNSS which is expected to constantly provide accurate positioning solutions for the system. As a consequence, in an urban or mountainous area where satellite signals are frequently obstructed by local topography, the reliability of a terrestrial MMS system is not always guaranteed. In this study, a rigorous approach for predicting GNSS satellite reception under topographic obstructions along an MMS surveyed path is developed. By utilising a digital terrain model and a lineofsight analysis, visible satellites for a moving platform are identified and used for estimating positioning quality under a GNSS relative positioning model. Based on the results from real case studies, it is illustrated that the proposed approach provides a reliable prediction for GNSS satellite obstruction and relative positioning quality. Consequently, the locations andor epochs associated with poor GNSS positioning qualities can be identified beforehand and an appropriate survey schedule can thus be arranged. Numéro de notice : A2015-929 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1179/1752270614Y.0000000110 En ligne : https://doi.org/10.1179/1752270614Y.0000000110 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=79734 [article]