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3D SAR simulation of urban areas based on detailed building models / Stefan Auer in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 12 (December 2010)
[article]
Titre : 3D SAR simulation of urban areas based on detailed building models Type de document : Article/Communication Auteurs : Stefan Auer, Auteur ; Timo Balz, Auteur ; S. Becker, Auteur ; R. Balmer, Auteur Année de publication : 2010 Article en page(s) : pp 1373 - 1384 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] bâtiment
[Termes IGN] centre de phase
[Termes IGN] coin réflecteur
[Termes IGN] image TerraSAR-X
[Termes IGN] interferométrie différentielle
[Termes IGN] lancer de rayons
[Termes IGN] modèle 3D de l'espace urbain
[Termes IGN] simulation d'imageRésumé : (Auteur) This paper confirms the need for detailed 3D models for the simulation of high-resolution SAR images in order to support Persistent Scatterer Interferometry (PSl) focused on single urban objects. Using a building model enhanced by facade grammar, multiple reflections at building facades are analyzed using ray tracing techniques and scatterers are localized in azimuth, range, and elevation. In a case study, salient signatures of a TerraSAR-X image are analyzed based on simulated sar reflectivity maps. Phase centers of trihedral reflections are mapped onto the building model and the physical correspondence of scatterers to building features is investigated. Surfaces contributing to salient scatterers are identified at the building model. Eventually, the use of sar simulation to support PSI is shown from two aspects: (a) for providing a-priori information about building layover, and (b) for extending knowledge about the nature of dominant scatterers. Numéro de notice : A2010-526 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.12.1373 En ligne : https://doi.org/10.14358/PERS.76.12.1373 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30718
in Photogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 12 (December 2010) . - pp 1373 - 1384[article]GPS IIF-1 satellite: Antenna phase center and attitude modeling / F. Dilssner in Inside GNSS, vol 5 n° 6 (September 2010)
[article]
Titre : GPS IIF-1 satellite: Antenna phase center and attitude modeling Type de document : Article/Communication Auteurs : F. Dilssner, Auteur Année de publication : 2010 Article en page(s) : 6 p. ; pp 59 - 64 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] antenne GPS
[Termes IGN] centre de phase
[Termes IGN] orientation du capteur
[Termes IGN] phase GPS
[Termes IGN] satellite GPSRésumé : (Auteur) Calculating the distances between satellites and user equipment is a basic operation for GNSS positioning. More precisely, these ranges are measured from the antenna phase centers of the satellites’ transmitting antenna. However, phase centers vary among types and generations of spacecraft and, further, the calculation requires knowledge of a satellite’s orientation or attitude. A researcher at the European Space Operations Center has analyzed the initial performance of the first GPS Block IIF space vehicle and found some expected - and unexpected - results. Numéro de notice : A2010-672 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=33454
in Inside GNSS > vol 5 n° 6 (September 2010) . - 6 p. ; pp 59 - 64[article]Documents numériques
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GPS IIF-1 satellite ... - scanAdobe Acrobat PDF Estimation of phase center corrections for GLONASS-M satellite antennas / F. Dilssner in Journal of geodesy, vol 84 n° 8 (August 2010)
[article]
Titre : Estimation of phase center corrections for GLONASS-M satellite antennas Type de document : Article/Communication Auteurs : F. Dilssner, Auteur ; T. Spinger, Auteur ; Claudia Flohrer, Auteur ; John M. Dow, Auteur Année de publication : 2010 Article en page(s) : pp 467 - 480 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement du signal
[Termes IGN] antenne GLONASS
[Termes IGN] centre de phase
[Termes IGN] correction du signal
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] mesurage de phase
[Termes IGN] positionnement par GNSS
[Termes IGN] satellite GLONASS
[Termes IGN] station GLONASS
[Termes IGN] traitement du signalRésumé : (Auteur) Driven by the comprehensive modernization of theGLONASS space segment and the increased global availability of GLONASS-capable ground stations, an updated set of satellite-specific antenna phase center corrections for the current GLONASS-M constellation is determined by processing 84 weeks of dual-frequency data collected between January 2008 and August 2009 by a worldwide network of 227 GPS-only and 115 combined GPS/GLONASS tracking stations. The analysis is performed according to a rigorous combined multi-system processing scheme providing full consistency between the GPS and the GLONASS system. The solution is aligned to a realization of the International Terrestrial Reference Frame 2005. The estimated antenna parameters are compared with the model values currently used within the International GNSS Service (IGS). It is shown that the z-offset estimates are on average 7 cm smaller than the corresponding IGS model values and that the block-specific mean value perfectly agrees with the nominal GLONASS-M z-offset provided by the satellite manufacturer. The existence of azimuth-dependent phase center variations is investigated and uncertainties in the horizontal offset estimates due to mathematical correlations and yaw-attitude modeling problems during eclipse seasons are addressed. Finally, it is demonstrated that the orbit quality benefits from the updated GLONASS-M antenna phase center model and that a consistent set of satellite antenna z-offsets for GPS and GLONASS is imperative to obtain consistent GPS- and GLONASS-derived station heights. Numéro de notice : A2010-439 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-010-0381-7 Date de publication en ligne : 08/04/2010 En ligne : https://doi.org/10.1007/s00190-010-0381-7 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30632
in Journal of geodesy > vol 84 n° 8 (August 2010) . - pp 467 - 480[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-2010081 SL Revue Centre de documentation Revues en salle Disponible Homogeneous reprocessing of the EUREF permanent network : first experiences and comparisons / A. Kenyeres in Bulletin of geodesy and geomatics BGG, vol 68 n° 3 (October 2009)
[article]
Titre : Homogeneous reprocessing of the EUREF permanent network : first experiences and comparisons Type de document : Article/Communication Auteurs : A. Kenyeres, Auteur ; Mariusz Figurski, Auteur ; P. Kaminski, Auteur ; et al., Auteur Année de publication : 2009 Article en page(s) : pp 207 - 218 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] CATREF
[Termes IGN] centre de phase
[Termes IGN] données géodésiques
[Termes IGN] réseau géodésique permanent
[Termes IGN] réseau permanent EUREF
[Termes IGN] série temporelle
[Termes IGN] traitement de données GNSSRésumé : (Auteur) The GPS analysis strategies, the applied models and software have been considerably changed since the global (IGS - International GNSS Service) and regional (EPN - EUREF Permanent Network) CORS networks are operational. All changes brought along temporal inhomogeneities in the estimated parameters, most apparently in the coordinate time series. After the introduction of the absolute phase centre variation (PCV) models of the satellite and ground GPS antennae, the complete re-analysis of the historical measurements could not be postponed. Within the IGS the re-analysis is now in progress and it will be followed by a coordinated re-processing of the EPN observations from 1996 on.
In preparation of the EPN reprocessing a pilot re-analysis has been done at the Military University of Technology (MUT) in Poland covering the complete EPN dataset and similar work has been started at the Royal Observatory of Belgium (ROB). The target of this work was to assess the required resources, the status and completeness of the database and to quantify the improvement gained by the reprocessing. Using the CATREF software (Altamimi et al. 2004) two cumulative solutions have been created by stacking the standard and the reprocessed weekly EPN SINEX solutions. In this paper, the first analysis of the estimated coordinates, velocities and the residual time series is presented. We detected 10-30% improvement in the weekly weighted RMS, we got smoother time series with smaller coordinate repeatability and a more «ITRF2005-conform» velocity field. The results highly support the need for a complete (from global to local level) GPS reprocessing and the establishment of a new ITRS realization in agreement with the GPS absolute PCV models.Numéro de notice : A2009-566 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=77993
in Bulletin of geodesy and geomatics BGG > vol 68 n° 3 (October 2009) . - pp 207 - 218[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 013-09031 RAB Revue Centre de documentation En réserve L003 Disponible IGS contribution to the ITRF / Zuheir Altamimi in Journal of geodesy, vol 83 n° 3-4 (March - April 2009)
[article]
Titre : IGS contribution to the ITRF Type de document : Article/Communication Auteurs : Zuheir Altamimi , Auteur ; Xavier Collilieux , Auteur Année de publication : 2009 Article en page(s) : pp 375 - 383 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes de référence et réseaux
[Termes IGN] centre de phase
[Termes IGN] International Terrestrial Reference Frame
[Termes IGN] positionnement par GPS
[Termes IGN] série temporelleRésumé : (auteur) We examine the contribution of the International GNSS Service (IGS) to the International Terrestrial Reference Frame (ITRF) by evaluating the quality of the incorporated solutions as well as their major role in the ITRF formation. Starting with the ITRF2005, the ITRF is constructed with input data in the form of time series of station positions (weekly for satellite techniques and daily for VLBI) and daily Earth Orientation Parameters. Analysis of time series of station positions is a fundamental first step in the ITRF elaboration, allowing to assess not only the stations behavior, but also the frame parameters and in particular the physical ones, namely the origin and the scale. As it will be seen, given the poor number and distribution of SLR and VLBI co-location sites, the IGS GPS network plays a major role by connecting these two techniques together, given their relevance for the definition of the origin and the scale of the ITRF. Time series analysis of the IGS weekly combined and other individual Analysis Center solutions indicates an internal precision (or repeatability) Numéro de notice : A2009-581 Affiliation des auteurs : IGN (1940-2011) Thématique : POSITIONNEMENT Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1007/s00190-008-0294-x En ligne : https://doi.org/10.1007/s00190-008-0294-x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=88650
in Journal of geodesy > vol 83 n° 3-4 (March - April 2009) . - pp 375 - 383[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 266-09031 RAB Revue Centre de documentation En réserve L003 Disponible Generation of a consistent absolute phase center correction model for GPS receiver and satellite antennas / Ralf Schmid in Journal of geodesy, vol 81 n° 12 (December 2007)PermalinkDORIS satellite phase center determination and consequences on the derived scale of the Terrestrial Reference Frame / Pascal Willis in Advances in space research, vol 39 n° 10 (May 2007)PermalinkAnalysis of DORIS range-rate residuals for TOPEX/Poseidon, Jason, Envisat and SPOT / Eelco Doornbos in Acta Astronautica, vol 60 n° 8-9 (April - May 2007)PermalinkComparaison de méthodes de calibrage du centre de phase d'antennes GPS / B. Akrour in Geomatica, vol 57 n° 4 (December 2003)PermalinkGPS : Theory, algorithms and applications / Guochang Xu (2003)PermalinkDeutsche Beiträge zu GPS-Kampagnen des Scientific Committee on Antarctic Research (SCAR) 1995-1998 / R. Dietrich (2000)PermalinkCalibration des antennes GPS / Serge Botton (1996)PermalinkAmbiguity resolution techniques in geodetic and geodynamic applications of the Global Positioning System / L. Mervart (1995)PermalinkAnalyse der GPS-Alpentraverse / M. Vogel (1995)PermalinkGPS-Verfahren für den Nahbereich mit kurzen Beobachtungszeiten in Vermessung und Ortung / K. Sauermann (1993)PermalinkTraitement d'une campagne GPS comportant plusieurs types de récepteurs bi-fréquences : campagne préliminaire UREF / Kouadio Severin M'bra (1990)PermalinkUntersuchung zum rationellen Einsatz des GPS in kleinräumigen Netzen / H.J. Euler (1990)PermalinkPermalink