Exploració per tema "Radar d'obertura sintètica"

Ara es mostren els items 193-212 de 243

    • Radiometric resolution of motion-induced synthetic aperture radiometer 

      Hyuk, Park; Camps Carmona, Adriano José; Choi, Min Gyu; Kim, Yong-Hoon (2011-07)
      Article
      Accés restringit per política de l'editorial
      The radiometric resolution of a motion-induced synthetic aperture radiometer (MISAR) is analytically obtained from the standard deviation of a baseline response, an observation scenario, and the imaging method of the MISAR. ...

    • Range spectral filtering in SAR interferometry: methods and limitations 

      Mestre Quereda, Alejandro; López Sánchez, Juan Manuel; Mallorquí Franquet, Jordi Joan (2022-11-10)
      Article
      Accés obert
      A geometrical decorrelation constitutes one of the sources of noise present in Synthetic Aperture Radar (SAR) interferograms. It comes from the different incidence angles of the two images used to form the interferograms, ...

    • Real-time agricultural fields monitoring with polarimetric radar 

      Villalvilla Ornat, Pol (Universitat Politècnica de Catalunya, 2020-09)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      As a support of the Hydroterra Mission by ESA, this project consists on the characterization, improvement and calibration of a low power ground based Synthetic Aperture Radar being developed for continuous polarimetric ...

    • Road extraction from SAR imagery based on multiscale geometric analysis of detector responses 

      He, Chu; Liao, Z.X.; Yang, Fang; Deng, Xinping; Liao, M.S. (2012)
      Article
      Accés restringit per política de l'editorial
      In this paper, a road network grouping algorithm for Synthetic Aperture Radar (SAR) images is proposed by exploiting multiscal e geometric analysis of detector responses. Before running the algorithm, a response map made ...

    • ROFI structure in the gulf of Lions and the NW Mediterranean Sea: field and remote sensing observations of surface coherent structures 

      Fraunie, Philippe; Redondo Apraiz, José Manuel; Platónov, Alexéi Konstantínovich; Díez Rilova, Margarita; Matulka, Anna Magdalena (Universidad Complutense de Madrid (UCM), 2010)
      Comunicació de congrés
      Accés obert
      The advances in radar sensors may be applied to study the flow in the region of fresh water influence (ROFI) region of the ocean. The Synthetic Aperture Radar (SAR) is a useful tool that may be used to study both marine ...

    • SAR interferometric coherence in wide band systems 

      Sagués Piella, Lluís; Bara Iniesta, Marc Antoni; Fabregas Canovas, Francisco Javier; Broquetas Ibars, Antoni (VSP BV, 2000-02-28)
      Article
      Accés obert
      This paper presents a study of the interferometric coherence aimed to the understanding of the main sources of phase error of an operative wide band system. This objective is accomplished by finding a theoretical expression ...

    • SAR system development for UAV multicopter platforms 

      Escartin Martínez, Antonio (Universitat Politècnica de Catalunya, 2015-06)
      Treball Final de Grau
      Accés obert
      This thesis describes the optimization of a synthetic aperture radar (SAR) at X-band and its integration into an unmanned aerial vehicle (UAV) of type octocopter. For such optimization the SAR system functionality was ...

    • SAR² - An augmented-reality App for exploration of principles of synthetic aperture radar 

      Stefko, Marcel; Shiyi, Li; Luck, Manuel; Hajnsek, Irena (Universitat Politècnica de Catalunya, 2022-04-29)
      Comunicació de congrés
      Accés obert
      SAR² is a prototype educational simulation software for the Microsoft Hololens, developed by students as part of a geoinformatics course. The aim of this software is to provide a tool to introduce and explain the concept ...

    • Sea clutter statistical characterization using TerraSAR-X data 

      Makhoul Varona, Eduardo; Zhan, Yu; Broquetas Ibars, Antoni; Ruiz Rodon, Josep; Baumgartner, Stefan (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The paper presents a preliminary statistical evaluation of the sea clutter returns imaged by a spaceborne synthetic aperture radar (SAR) mission as TerraSAR-X. Two polarimetric data takes, Dual-polarized (Dual-Pol) and ...

    • Segmentation of polsar images 

      Blasco Coll, Andreu (Universitat Politècnica de Catalunya, 2017-05)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Technische Universität Berlin
      This project will implement a segmentation algorithm for PolSAR images to represent the boundaries of the areas in the image and the regions. Identifying the regions on SAR images can be useful for further analysis, for ...

    • Sensitivity of the DDM peak to geophysical variables 

      Camps Carmona, Adriano José; Hyuk, Park (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      GNSS-R (Global Navigation Satellite Systems Reflectometry) can be understood as a multi-static radar with as many transmitters as navigation satellites and in view and can be tracked. GNSS-Reflectometers can process the ...

    • Sentinel-1 Extended Timing Annptation Dataset (ETAD) evaluation for tropospheric phase compensation. 

      Saez i Mediavilla, Adrià (Universitat Politècnica de Catalunya, 2022-10-27)
      Projecte Final de Màster Oficial
      Accés obert
      The Extended Timing Annotation Dataset (ETAD) for Copernicus Sentinel-1 is a new auxiliary product developed by ESA (with DLR as contractor), providing users with corrections to improve geometric accuracy of Sentinel-1 SLC ...

    • Side-lobe cancelation in DInSAR pixel selection with SVA 

      Iglesias González, Rubén; Mallorquí Franquet, Jordi Joan (2013-07)
      Article
      Accés restringit per política de l'editorial
      Synthetic aperture radar (SAR) systems are inherently band limited in both range and azimuth, and hence, the point spread function (PSF) has the shape of a bidimensional sinc function. In addition, all SAR images are ...

    • Significant wave height retrieval based on the effective number of incoherent averages 

      Martín Alemany, Francisco; Camps Carmona, Adriano José; Martín-Neira, Manuel; d'Addio, Salvatore; Fabra Cervellera, Fran; Rius Jordán, Antonio; Hyuk, Park (2015)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The effectiveness of incoherent averaging depends on the level of correlation between consecutive waveforms, which can vary with the geometry and with the sea state conditions. In addition it is also dependent on the ...

    • Simulació estadística de clutter marí amb models de distribució K 

      González Moragas, Oriol (Universitat Politècnica de Catalunya, 2011-09-07)
      Projecte/Treball Final de Carrera
      Accés obert
      English: The aim of this project is the simulation of the radar echo signal scattered by the sea surface which is called "Sea clutter". This project is related with the SAR MTI systems which are a type of radar systems ...

    • Simulación de un radar de alta resolución (SAR) multicanal 

      García Lebière, Eduardo (Universitat Politècnica de Catalunya, 2012-12-13)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] This project studies the behavior of a high-resolution radar (SAR) multichannel. The study is based on numerical simulation of SAR signals which is dedicated the first part of the project. Then we study the SAR ...

    • Simulation, detection, and classification of vessels in maritime SAR images 

      Yam Ontiveros, Luis Eduardo (Universitat Politècnica de Catalunya, 2016-09-21)
      Tesi
      Accés obert
      Over the last decades, environmental and socio-economic factors have generated interest on the observation of the ocean. Thus, the monitoring of maritime human activity has become crucial for the protection of the marine ...

    • Simultaneous tracking and RSS model calibration by robust filtering 

      Castro Arvizu, Juan Manuel; Vila Valls, Jordi; Closas, Pau; Fernández Rubio, Juan Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Received Signal Strength (RSS) localization is widely used due to its simplicity and availability in most mobile devices. The RSS channel model is defined by the propagation losses and the shadow fading. These parameters ...

    • Single-pass polarimetric SAR interferometry for vessel classification 

      Margarit Martín, Gerard; Mallorquí Franquet, Jordi Joan; Fabregas Canovas, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-11-30)
      Article
      Accés obert
      This paper presents a novel method for vessel classification based on single-pass polarimetric synthetic aperture radar (SAR) interferometry. It has been developed according to recent ship scattering studies that show that ...

    • Sistema de control para un interferómetro de determinación orbital 

      Mahyou Amarki, Otman (Universitat Politècnica de Catalunya, 2018-01)
      Treball Final de Grau
      Accés obert
      Design and implementation of a control system for an orbital determination system called GEOSAR. This system consists of multiple receivers each of which incorporates multiple subsystems such as phase-synchronized oscillators, ...