Centre de documentation
scientifique

On the importance of accurately ray-traced troposphere corrections for interferometric SAR data / T. Hobiger in Journal of geodesy, vol 84 n° 9 (September 2010)  

Public [article]  inJournal of geodesy > vol 84 n° 9 (September 2010) . - pp 537 - 546 Titre : On the importance of accurately ray-traced troposphere corrections for interferometric SAR data Type de document : Article/Communication Auteurs : T. Hobiger, Auteur ; S. Kinoshita, Auteur ; S. Shimizu, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 537 - 546 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] correction troposphérique [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] lancer de rayons [Termes IGN] modèle atmosphérique [Termes IGN] propagation troposphérique Résumé : (Auteur) Numerical weather models offer the possibility to compute corrections for a variety of space geodetic applications, including remote sensing techniques like interferometric SAR. Due to the computational complexity, exact ray-tracing is avoided in many cases and mapping approaches are applied to transform vertically integrated delay corrections into slant direction. Such an approach works well as long as lateral atmospheric gradients are small enough to be neglected. But since such an approximation holds only for very rare cases it is investigated how horizontal gradients of different atmospheric constituents can evoke errors caused by the mapping strategy. Moreover, it is discussed how sudden changes of wet refractivity can easily lead to millimeter order biases when simplified methods are applied instead of ray-tracing. By an example, based on real InSAR data, the differences of the various troposphere correction schemes are evaluated and it is shown how the interpretation of the geophysical signals can be affected. In addition, it is studied to which extend troposphere noise can be reduced by applying the exact ray-tracing solution. Numéro de notice : A2010-414 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0393-3 Date de publication en ligne : 11/06/2010 En ligne : https://doi.org/10.1007/s00190-010-0393-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30607 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
266-2010091	SL	Revue	Centre de documentation	Revues en salle	Disponible