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Auteur Elżbieta Protaziuk |
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Geometric aspects of ground augmentation of satellite networks for the needs of deformation monitoring / Elżbieta Protaziuk in Artificial satellites, vol 51 n° 2 (June 2016)
[article]
Titre : Geometric aspects of ground augmentation of satellite networks for the needs of deformation monitoring Type de document : Article/Communication Auteurs : Elżbieta Protaziuk, Auteur Année de publication : 2016 Article en page(s) : pp 75 - 88 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale
[Termes IGN] déformation de la croute terrestre
[Termes IGN] évaluation
[Termes IGN] précision des données
[Termes IGN] pseudolite
[Termes IGN] qualité des données
[Termes IGN] système d'extension au solRésumé : (auteur) Satellite measurements become competitive in many tasks of engineering surveys, however, in many requiring applications possibilities to apply such solutions are still limited. The possibility to widely apply satellite technologies for displacements measurements is related with new challenges; the most important of them relate to increasing requirements concerning the accuracy, reliability and continuity of results of position determination. One of the solutions is a ground augmentation of satellite network, which intention is to improve precision of positioning, ensure comparable accuracy of coordinates and reduce precision fluctuations over time. The need for augmentation of GNSS is particularly significant in situations: where the visibility of satellites is poor because of terrain obstacles, when the determined position is not precise enough or a satellites constellation does not allow for reliable positioning. Ground based source/sources of satellite signal placed at a ground, called pseudosatellites, or pseudolites were intensively investigated during the last two decades and finally were developed into groundbased, time-synchronized transceivers, that can transmit and receive a proprietary positioning signal. The paper presents geometric aspects of the ground based augmentation of the satellite networks using various quality measures of positioning geometry, which depends on access to the constellation of satellites and the conditions of the observation environment. The issue of minimizing these measures is the key problem that allows to obtain the position with high accuracy. For this purpose, the use of an error ellipsoid is proposed and compared with an error ellipse. The paper also describes the results of preliminary accuracy analysis obtained at test area and a comparison of various measures of the quality of positioning geometry. Numéro de notice : A2016-594 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1515/arsa-2016-0007 En ligne : http://dx.doi.org/10.1515/arsa-2016-0007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=81763
in Artificial satellites > vol 51 n° 2 (June 2016) . - pp 75 - 88[article]