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Interference suppression algorithm for SAR based on time-frequency transform / S. Zhang in IEEE Transactions on geoscience and remote sensing, vol 49 n° 10 Tome 1 (October 2011)
[article]
Titre : Interference suppression algorithm for SAR based on time-frequency transform Type de document : Article/Communication Auteurs : S. Zhang, Auteur ; X. Xing, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 3765 - 3779 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] filtre passe-bande
[Termes IGN] image radar moirée
[Termes IGN] interférence
[Termes IGN] transformation de Fourier
[Termes IGN] transformation en ondelettesRésumé : (Auteur) The goal of this paper is to suppress the narrowband interference (NBI) and wideband interference (WBI) in synthetic aperture radar (SAR) by using a nonparametric method. The method is based on the analysis of time-frequency characteristic of NBI and WBI from which an interference suppression filter combined with the constant false alarm rate algorithm is designed. In this approach, the short-time Fourier transform (STFT) is used to estimate the instantaneous frequency of the SAR echo data with interference. In the STFT domain, the instantaneous frequency spectrum is represented by wavelet, and then, the designed filter filters the corresponding wavelet coefficients of the interference components. In addition, this algorithm is robust to time-varying NBI and WBI. The performance of the proposed approach is evaluated by the simulated and measured data, and the effectiveness is demonstrated. Numéro de notice : A2011-428 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2164409 Date de publication en ligne : 15/09/2011 En ligne : https://doi.org/10.1109/TGRS.2011.2164409 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31207
in IEEE Transactions on geoscience and remote sensing > vol 49 n° 10 Tome 1 (October 2011) . - pp 3765 - 3779[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-201110A1 RAB Revue Centre de documentation En réserve L003 Disponible Performance requirements for ionospheric correction of low-frequency SAR data / J. Meyer in IEEE Transactions on geoscience and remote sensing, vol 49 n° 10 Tome 1 (October 2011)
[article]
Titre : Performance requirements for ionospheric correction of low-frequency SAR data Type de document : Article/Communication Auteurs : J. Meyer, Auteur Année de publication : 2011 Article en page(s) : pp 3694 - 3702 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] bande L
[Termes IGN] bande P
[Termes IGN] correction ionosphérique
[Termes IGN] image radar moirée
[Termes IGN] interféromètrie par radar à antenne synthétiqueRésumé : (Auteur) In recent years, significant progress has been made in developing theory and methods for modeling, detecting, and correcting ionospheric effects in low-frequency synthetic aperture radar (SAR) data. While a large number of correction methods have been developed that differ in sensitivity, data needs, and spatiotemporal accuracy, a lack of performance requirements for ionospheric correction has prevented an evaluation of their suitability for operational implementation. Hence, this paper focuses on the development of performance requirements for the correction of ionospheric effects in low-frequency SAR data. The requirements are derived considering the data quality needs of a set of SAR applications and will ensure the SAR data after ionospheric correction to meet calibration specifications and maintain full performance during all ionospheric conditions. The proposed requirements can serve as a benchmark for a performance assessment of ionospheric correction methods and will help define their suitability for operational implementation. Requirements are determined for SAR polarimetry, SAR imaging, SAR interferometry, and ionospheric research. Numéro de notice : A2011-427 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2146786 Date de publication en ligne : 07/06/2011 En ligne : https://doi.org/10.1109/TGRS.2011.2146786 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31206
in IEEE Transactions on geoscience and remote sensing > vol 49 n° 10 Tome 1 (October 2011) . - pp 3694 - 3702[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-201110A1 RAB Revue Centre de documentation En réserve L003 Disponible Radar backscatter mapping using TerraSAR-X / P. Rizzoli in IEEE Transactions on geoscience and remote sensing, vol 49 n° 10 Tome 1 (October 2011)
[article]
Titre : Radar backscatter mapping using TerraSAR-X Type de document : Article/Communication Auteurs : P. Rizzoli, Auteur ; B. Braütigam, Auteur ; S. Wollstadt, Auteur ; J. Mittermayer, Auteur Année de publication : 2011 Article en page(s) : pp 3538 - 3547 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] bande X
[Termes IGN] image radar
[Termes IGN] image TanDEM-X
[Termes IGN] image TerraSAR-X
[Termes IGN] mosaïquage d'images
[Termes IGN] rétrodiffusionRésumé : (Auteur) Global backscatter data can be used for accurate synthetic aperture radar (SAR) performance estimation and optimizing instrument settings for SAR systems, e.g. the TerraSAR-X mission (TSM) and the TanDEM-X mission (TDM). The goal of this work is the generation of X-band backscatter maps by mosaicking images acquired by the TSM. An algorithm that allows the estimation of the on-ground backscatter, for any required polarization and incidence angle from the available data, is implemented. In this paper, the backscatter map generation algorithm is presented, together with the first results, obtained from the TSX-1 data. The validity of the interpolation models is also discussed, as they will form the basis for a future global statistical analysis and modeling of backscatter behavior in X-band SAR data. Numéro de notice : A2011-425 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2161874 Date de publication en ligne : 08/09/2011 En ligne : https://doi.org/ 10.1109/TGRS.2011.2161874 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31204
in IEEE Transactions on geoscience and remote sensing > vol 49 n° 10 Tome 1 (October 2011) . - pp 3538 - 3547[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-201110A1 RAB Revue Centre de documentation En réserve L003 Disponible Prediction of the error induced by topography in satellite microwave radiometric observations / Luca Pulvirenti in IEEE Transactions on geoscience and remote sensing, vol 49 n° 9 (September 2011)
[article]
Titre : Prediction of the error induced by topography in satellite microwave radiometric observations Type de document : Article/Communication Auteurs : Luca Pulvirenti, Auteur ; Nazzareno Pierdicca, Auteur ; F. Silvio, Auteur Année de publication : 2011 Article en page(s) : pp 3180 - 3188 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] Alpes
[Termes IGN] analyse comparative
[Termes IGN] angle d'incidence
[Termes IGN] bande C
[Termes IGN] bande L
[Termes IGN] classification par réseau neuronal
[Termes IGN] humidité du sol
[Termes IGN] image radar
[Termes IGN] image satellite
[Termes IGN] montagne
[Termes IGN] plaine
[Termes IGN] régression
[Termes IGN] relief
[Termes IGN] sol nu
[Termes IGN] télédétection en hyperfréquence
[Termes IGN] topographie
[Termes IGN] valeur radiométriqueRésumé : (Auteur) A numerical simulator of satellite microwave radiometric observations of mountainous scenes, developed in a previous study, has been used to predict the relief effects on the measurements of a spaceborne radiometer. For this purpose, the trends of the error due to topography, i.e., the difference between the antenna temperature calculated for a topographically variable surface and that computed for a flat terrain versus the parameters representing the relief, have been analyzed. The analysis has been mainly performed for a mountainous area in the Alps by assuming a simplified land-cover scenario consisting of bare terrain with two roughness conditions (smooth and rough soils) and considering L- and C-bands, i.e., those most suitable for soil moisture retrieval. The results have revealed that the error in satellite microwave radiometric observations is particularly correlated to the mean values of the height and slope of the radiometric pixel, as well as to the standard deviations of the aspect angle and local incidence angle. Both a regression analysis and a neural-network approach have been applied to estimate the error as a function of the parameters representing the relief, using the simulator to build training and test sets. The prediction of the topography effects and their correction in radiometric images have turned out to be feasible, at least for the scenarios considered in this study. Numéro de notice : A2011-361 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2010.2096514 Date de publication en ligne : 06/01/2011 En ligne : https://doi.org/10.1109/TGRS.2010.2096514 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31140
in IEEE Transactions on geoscience and remote sensing > vol 49 n° 9 (September 2011) . - pp 3180 - 3188[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2011091 RAB Revue Centre de documentation En réserve L003 Disponible Three-dimensional humidity retrieval using a network of compact microwave radiometers to correct for variations in wet tropospheric path delay in spaceborne interferometric SAR imagery / S. Sahoo in IEEE Transactions on geoscience and remote sensing, vol 49 n° 9 (September 2011)
[article]
Titre : Three-dimensional humidity retrieval using a network of compact microwave radiometers to correct for variations in wet tropospheric path delay in spaceborne interferometric SAR imagery Type de document : Article/Communication Auteurs : S. Sahoo, Auteur ; C. Reising, Auteur ; S. Padmanabhan, Auteur ; et al., Auteur Année de publication : 2011 Article en page(s) : pp 3281 - 3290 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications
[Termes IGN] dégradation du signal
[Termes IGN] distribution spatiale
[Termes IGN] image radar moirée
[Termes IGN] image spatiale
[Termes IGN] interféromètrie par radar à antenne synthétique
[Termes IGN] propagation troposphérique
[Termes IGN] teneur en vapeur d'eau
[Termes IGN] vapeur d'eau
[Termes IGN] variation temporelleRésumé : (Auteur) Spaceborne interferometric synthetic aperture radar (InSAR) imaging has been used for over a decade to monitor tectonic movements and landslides, as well as to improve digital elevation models. However, InSAR is affected by variations in round-trip propagation delay due to changes in ionospheric total electron content and in tropospheric humidity and temperature along the signal path. One of the largest sources of uncertainty in estimates of tropospheric path delay is the spatial and temporal variability of water vapor density, which currently limits the quality of InSAR products. This problem can be partially addressed by using a number of SAR interferograms from subsequent satellite overpasses to reduce the degradation in the images or by analyzing a long time series of interferometric phases from permanent scatterers. However, if there is a sudden deformation of the Earth's surface, the detection of which is one of the principal objectives of InSAR measurements over land, the effect of water vapor variations cannot be removed, reducing the quality of the interferometric products. In those cases, high-resolution information on the atmospheric water vapor content and its variation with time can be crucial to mitigate the effect of wet-tropospheric path delay variations. This paper describes the use of a ground-based microwave radiometer network to retrieve 3D water vapor density with fine spatial and temporal resolution, which can be used to reduce InSAR ambiguities due to changes in wet-tropospheric path delay. Retrieval results and comparisons between the integrated water vapor measured by the radiometer network and satellite data are presented. Numéro de notice : A2011-362 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2011.2119400 Date de publication en ligne : 16/05/2011 En ligne : https://doi.org/10.1109/TGRS.2011.2119400 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31141
in IEEE Transactions on geoscience and remote sensing > vol 49 n° 9 (September 2011) . - pp 3281 - 3290[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 065-2011091 RAB Revue Centre de documentation En réserve L003 Disponible A "new hybrid" modelling for geometric processing of Radarsat-2 data without user's GCP / Thierry Toutin in Photogrammetric Engineering & Remote Sensing, PERS, vol 77 n° 6 (June 2011)PermalinkPermalinkEdge enhancement algorithm based on the wavelet transform for automatic edge detection InSAR images / Mariví Tello Alonso in IEEE Transactions on geoscience and remote sensing, vol 49 n° 1 Tome 1 (January 2011)PermalinkPhysical limitations on detecting tunnels using underground-focusing spotlight synthetic aperture radar / J. Martinez-Lorenzo in IEEE Transactions on geoscience and remote sensing, vol 49 n° 1 Tome 1 (January 2011)PermalinkThe effect of orientation angle compensation on coherency matrix and polarimetric target decompositions / Jong-Sen Lee in IEEE Transactions on geoscience and remote sensing, vol 49 n° 1 Tome 1 (January 2011)Permalink3D SAR simulation of urban areas based on detailed building models / Stefan Auer in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 12 (December 2010)PermalinkGeodetically accurate InSAR data processor / H. Zebker in IEEE Transactions on geoscience and remote sensing, vol 48 n° 12 (December 2010)PermalinkMétrologie satellitaire et évaluation des risques liés aux instabilités des sols et des structures : une innovation au service de la ville durable / F. Ranvier in Travaux, n° 877 (01/12/2010)PermalinkDes preuves venues de l'espace : Traduction de l'original paru en décembre 2009 dans la revue allemande "Der Eisenbahningenieur" / K. Herrmann in XYZ, n° 125 (décembre 2010 - février 2011)PermalinkGeographic information system (GIS)-aided per-segment scene analysis of multi-temporal spaceborne synthetic aperture radar (SAR) series with application to urban areas / G. Trianni in International Journal of Remote Sensing IJRS, vol 31 n° 22 (November 2010)PermalinkEffect of corn on C-an L-band radar backscatter: a correction method for soil moisture retrieval / A. Joseph in Remote sensing of environment, vol 114 n° 11 (15/11/2010)PermalinkPersistent scatterer interferometry : potential, limits and initial C- and X-band comparison / M. Crosetto in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 9 (September 2010)PermalinkGeneration of three-dimensional deformation maps from InSAR data using spectral diversity techniques / E. Erten in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 4 (July - August 2010)PermalinkRadarsat-2 data: automated high accuracy geometric correction and mosaicking without ground control points / Penggen Cheng in Geoinformatics, vol 13 n° 5 (01/07/2010)PermalinkVertical accuracy of digital elevation model from Shuttle Radar Topographic Mission: a case study / Ashu Sharma in Geocarto international, vol 25 n° 4 (July 2010)PermalinkEvaluation of Terrasar-X observations for wetland INSAR application / S.H. Hong in IEEE Transactions on geoscience and remote sensing, vol 48 n° 2 (February 2010)PermalinkInterferometric microrelief sensing with Terrasar-X: first results / J. Baade in IEEE Transactions on geoscience and remote sensing, vol 48 n° 2 (February 2010)PermalinkA matching algorithm for detecting land use changes using case-based reasoning / X. Li in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 11 (November 2009)PermalinkClassification comparisons between dual-pol, compact polarimetric and quad-pol SAR imagery / T. Ainsworth in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)PermalinkDiscrimination of agricultural crops in a tropical semi-arid region of Brazil based on L-band polarimetric airborne SAR data / W. Silva in ISPRS Journal of photogrammetry and remote sensing, vol 64 n° 5 (September - October 2009)Permalink