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The influence of elliptical Gaussian laser beam on inversion of terrain information for satellite laser altimeter / Zhou Hui in Photogrammetric Engineering & Remote Sensing, PERS, vol 82 n° 10 (October 2016)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 82 n° 10 (October 2016) . - pp 767 - 773 Titre : The influence of elliptical Gaussian laser beam on inversion of terrain information for satellite laser altimeter Type de document : Article/Communication Auteurs : Zhou Hui, Auteur ; Li Song, Auteur ; Yang Chi, Auteur Année de publication : 2016 Article en page(s) : pp 767 - 773 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale [Termes IGN] données ICEsat [Termes IGN] erreur de positionnement [Termes IGN] fonction inverse [Termes IGN] modèle mathématique [Termes IGN] récepteur radar [Termes IGN] signal Résumé : (Auteur) The transmitted laser mode of Geosciences Laser Altimeter System (GLAS) is a significant factor in determining the received pulse waveforms, which are used for inversing target information. The inversion algorithms in the scientific literature are based on the assumption that the transmitted laser is circular Gaussian. The practical laser pattern of GLAS is not circularly symmetric, but elliptical Gaussian. The received pulse shape will contain a bias, which would cause an error in the inversion information. In this paper, we describe new theoretical models about received pulse signal and inversion errors of range, surface slope and roughness. We present the results of waveforms shape and inversion errors for three representative terrains with different surface slope and roughness. The results show that the maximal inversion errors of range, surface slope, and roughness will reach 24.25 cm, 8.82° and 4.58 m, respectively, which cannot be negligible. Therefore, the inversion information should be reevaluated and amended depending on the type of terrain. Numéro de notice : A2016-933 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : 10.14358/PERS.82.10.767 En ligne : http://dx.doi.org/10.14358/PERS.82.10.767 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83347 [article]