Exploració per tema "Synthetic aperture radar"

Ara es mostren els items 1-20 de 202

    • A comparison of phase unwrapping techniques in synthetic aperture radar interferometry 

      Ferrando Bataller, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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      Accés obert
      A comparison of different phase unwrapping techniques based on the least mean square error is presented. A testing environment based on simulated interferograms has been created in order to assess the methods described in ...

    • A fully-focused SAR omega-K closed-form algorithm for the Sentinel-6 radar altimeter: methodology and applications 

      Hernández Burgos, Sergi; Gibert Gutiérrez, Ferran; Broquetas Ibars, Antoni; Kleinherenbrink, Marcel; Flores De la Cruz, Adrián; Gómez Olivé, Adrià; García Mondéjar, Albert; Roca Aparici, Mònica (Institute of Electrical and Electronics Engineers (IEEE), 2024-01-01)
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      Accés obert
      The 2-D frequency-based omega-K method is known to be a suitable algorithm for fully focused SAR (FF-SAR) radar altimeter processors, as its computational efficiency is much higher than equivalent time-based alternatives ...

    • A Ku-band geosynchronous synthetic aperture radar mission analysis with medium transmitted power and medium-sized antenna 

      Ruiz, Josep; Broquetas Ibars, Antoni; Monti Guarnieri, Andrea; Rocca, Fabio (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, the feasibility of a geosynchronous satellite for Synthetic Aperture Radar applications is assessed. The nearly fixed position of geosynchronous satellites offers new features to SAR acquisition such as ...

    • A miniaturized two axis sun sensor for attitude control of nano-satellites 

      Angulo, M.; Gras, Ana; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Ricart Campos, Jordi; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Quero, J.M.; Tarrida, C. L.; Reina, M. (2010-10-10)
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      Accés obert
      This paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ...

    • A model-free four component scattering power decomposition for polarimetric SAR data 

      Dey, Subhadip; Bhattacharya, Avik; Frery, Alejandro C.; López Martínez, Carlos; Rao, Yalamanchili S. (Institute of Electrical and Electronics Engineers (IEEE), 2021-03-29)
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      Target decomposition methods of polarimetric Synthetic Aperture Radar (PolSAR) data explain scattering information from a target. In this regard, several conventional model-based methods utilize scattering power components ...

    • A multi-frequency FMCW GBSAR: system description and first results 

      Amézaga Sarries, Adrià; López Martínez, Carlos; Jové Casulleras, Roger (Institute of Electrical and Electronics Engineers (IEEE), 2021)
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      This paper provides a high level overview of a multi-frequency Ground-Based Synthetic Aperture Radar operating at X-, C-, L- and P-bands. The system core is implemented using a flexible high performance Software Defined ...

    • A multi-frequency SDR-based GBSAR: System overview and first results 

      Amézaga Sarries, Adrià; López Martínez, Carlos; Jové Casulleras, Roger (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-21)
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      Accés obert
      This work describes a system-level overview of a multi-frequency GBSAR built around a high performance software defined radio (SDR). The main goal of the instrument is to be employed as a demonstrator and experimental ...

    • A near field spherical wave inverse synthetic aperture radar technique 

      Broquetas Ibars, Antoni; Jofre Roca, Lluís; Cardama Aznar, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 1992)
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      The authors present an imaging near-field spherical wave inverse synthetic aperture radar (SWISAR) algorithm based on a focusing operator of the scattered fields on the target surface. A spherical wave can be easily generated ...

    • A Small Baseline DIFSAR Approach for Investigating Deformations on Full Resolution SAR Interferograms 

      Lanari, Ricardo; Mora Sacristan, Óscar; Manunta, Michele; Mallorquí Franquet, Jordi Joan; Berardino, P.; Sansoti, Eugenio (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-07-31)
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      Accés obert
      This paper presents a differential synthetic aperture radar (SAR) interferometry (DIFSAR) approach for investigating deformation phenomena on full-resolution DIFSAR interferograms. In particular, our algorithm extends ...

    • Acceleration of synthetic aperture radar for on-board space systems 

      Solé i Bonet, Marc; Rodríguez Ferrández, Iván; Steenari, David; Kosmidis, Leonidas (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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      There is an increasing trend in modern space systems to move processing that until now was transmitted to ground for processing, on board the satellite. Synthetic Aperture Radar (SAR) is an example of such processing. ...

    • ACE-OT: Polarimetric SAR data based amplitude contrast enhancement algorithm for offset tracking applications 

      Du, Sen; Mallorquí Franquet, Jordi Joan; Zhao, Feng (Institute of Electrical and Electronics Engineers (IEEE), 2022-08-01)
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      Accés obert
      The use of polarimetric synthetic aperture radar (SAR) data can improve the performance of persistent scatterer interferometry (PSI). However, its huge potential remains locked for the amplitude information-based offset ...

    • Active reflectors for interferometric SAR deformation measurement 

      Wassie, Yismaw Abera; Crosetto, Michele; Luzi, Guido; Montserrat, Oriol; Barra, Anna; Palamá, Riccardo; Cuevas Gonzalez, Maria; Mirmazloumi, Seyedmohammad; Espín López, Pedro Fidel; Crippa, Bruno (2021-06-28)
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      Accés obert
      This paper is focused on the design, implementation and testing of an active reflector, to be used to support deformation monitoring studies based on Synthetic Aperture Radar interferometry. The device is designed to work ...

    • Adaptation of a disaggregation algorithm to be applied to ESA CCI database. Validation at the Iberian Peninsula. 

      Lucena González, Ares (Universitat Politècnica de Catalunya, 2022-10-26)
      Treball Final de Grau
      Accés obert
      We are in a climatic emergency and the regular and global and/or local monitoring of essential climatic variables (ECV) is of great help to be able to know and mitigate the effects of climate change. Soil moisture is on ...

    • Adaptive Digital Beam-Forming for High-Resolution Wide-Swath Synthetic Aperture Radar 

      Makhoul Varona, Eduardo (Universitat Politècnica de Catalunya, 2009-06-29)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Deutsches Zentrum für Luft-und Raumfahrt
      The thesis “Adaptive Digital Beam-Forming for High-Resolution Wide-Swath Synthetic Aperture Radar” is a project carried out in the Microwaves and Radar Institute (IHR) at the German Aerospace Center (DLR) The objective ...

    • Advanced processing of remotely sensed big data for cultural heritage conservation 

      Shimoni, Michal; Croonenborghs, Thibauld; Declercq, Pierre-Yves; Drougkas, Anastasios; Verstrynge, Els; Hocquet, François-Philippe; Hayen, Roald; Van Balen, Koen (Institute of Electrical and Electronics Engineers (IEEE), 2019)
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      Damage assessment, protection and preservation of built patrimony are a priority at national and local levels due to their importance to many cultural and economic aspects. This paper presents a methodology to estimate the ...

    • Advances in multidimensional synthetic aperture radar signal processing 

      López Martínez, Carlos; Ferro-Famil, Laurent; Reigber, Andreas (2010)
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      Accés obert

    • Airborne bistatic SAR receiver with the capability of use different opportunity transmitters 

      Merlano Duncan, Juan Carlos; López Dekker, Francisco J.; Mallorquí Franquet, Jordi Joan; Duque Biarge, Sergio (2008)
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      This paper describes the design and construction of a bistatic SAR receiver suitable for airborne applications, using orbital SAR systems (ENVISAT, ERS-2, RADARSAT, TerraSAR-X among others) as opportunity transmitters. The ...

    • An adaptive scattering-mechanism-based filtering for multi-temporal pol(In)SAR data 

      Zhao, Feng; Mallorquí Franquet, Jordi Joan (VDE Conference Publications, 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a new adaptive filtering method for multi-temporal Pol(In)SAR images' denoising. Based on the polarimetric scattering mechanism of the given PolSAR data, the filtering first classifies all pixels into ...

    • An assessment of SAOCOM L-Band PolInSAR capabilities for canopy height estimation: A case study over managed forests in Argentina 

      Seppi, Santiago Ariel; López Martínez, Carlos; Joseau, Marisa Jacqueline (Institute of Electrical and Electronics Engineers (IEEE), 2024-02-07)
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      This work presents the first results of canopy height mapping with L -Band SAOCOM data by means of Polarimetric SAR Interferometry (PolInSAR). For this study case, a colocated temporal series of SAOCOM fully polarimetric ...

    • An improvement of offset tracking for cross hair (CH) and patch like (PL) elimination and reliability estimation for large deformation monitoring with SAR data 

      Du, Sen; Mallorquí Franquet, Jordi Joan (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      SAR based offset tracking (OT) is an efficient tool for ground deformation observation, and signal to noise ratio (SNR) is its common error indicator. However, ground feature variations often weaken the accuracy of OT. In ...