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Real-time adjustment underwater positioning system for submarines / W. Cheng in Marine geodesy, vol 33 n° 2-3 (April - September 2010)  

Public [article]  inMarine geodesy > vol 33 n° 2-3 (April - September 2010) . - pp 117 - 134 Titre : Real-time adjustment underwater positioning system for submarines Type de document : Article/Communication Auteurs : W. Cheng, Auteur ; J. Jhou, Auteur Année de publication : 2010 Article en page(s) : pp 117 - 134 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement [Termes IGN] compensation [Termes IGN] ligne de base [Termes IGN] modèle géométrique [Termes IGN] modèle numérique de terrain [Termes IGN] onde acoustique [Termes IGN] positionnement cinématique en temps réel [Termes IGN] relief sous-marin [Termes IGN] sous-marin [Termes IGN] temps réel [Termes IGN] traitement automatique de données [Termes IGN] vitesse Résumé : (Auteur) A rapid real-time adjustment scheme is proposed for improving the precision of the conventional short-base line (SBL) positioning fix system used by submarines and other underwater vehicles. In the proposed approach, an initial position estimate is obtained by solving the conventional SBL tracking equations of the submarine given the assumptions of a constant speed of sound in water and a straight-line propagation path. In the first stage of the real-time adjustment procedure, this initial estimate is corrected using an iterative computation scheme based on a 3D geometry model. The improved position estimate is then used to compute a new, more accurate value of the speed of sound in water. Finally, in the second stage of the real-time adjustment procedure, the corrected speed of sound in water and the discrepancy between the original and corrected position estimates obtained in the first adjustment procedure are applied to update the coordinates of the submarine based on the second signal received from the pinger. The numerical results show that the proposed real-time adjustment system yields a significant improvement in the accuracy of the positioning fix estimates compared to those obtained from the conventional SBL method or the SBL method with the first adjustment procedure only. Numéro de notice : A2010-555 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.1080/01490419.2010.492279 Date de publication en ligne : 16/05/2011 En ligne : https://doi.org/10.1080/01490419.2010.492279 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30747 [article]

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