Searched for: subject%3A%22Synthetic%255C%2BAperture%255C%2Bradar%22
(1 - 20 of 81)
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de Jong, N.J. (author), Otten, M.P.G. (author), Cuenca, M.C. (author), Uysal, F. (author), de Wit, J.J.M. (author)This paper investigates the benefits of multichannel processing for inverse synthetic aperture radar (ISAR) imaging. There are potential advantages of multichannel processing in radar systems, for example, improved motion estimation, clutter suppression, extraction of supporting information, such as sea wave direction and speed, and ship wake...conference paper 2021
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Bekers, D.J. (author), Jacobs, S. (author), Monni, S. (author), Bolt, R.J. (author), Fortini, D. (author), Capece, P. (author), Toso, G. (author)The article presents the design of a Ka-band synthetic aperture radar (SAR) instrument based on innovative phased-array antennas, with steering capability in azimuth and elevation. To limit the complexity and costs associated with conventional large active arrays with regular layouts, a sparse array concept is presented. The proposed approach...article 2019
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Ruiz-Constán, A. (author), Ruiz-Armenteros, A.M. (author), Martos-Rosillo, S. (author), Galindo-Zaldívar, J. (author), Lazecky, M. (author), García, M. (author), Sousa, J.J. (author), Sanz de Galdeano, C. (author), Delgado-Blasco, J.M. (author), Jiménez-Gavilán, P. (author), Caro-Cuenca, M. (author), Luque-Espinar, J.A. (author)This research underlines the need to improve water management policies for areas linked to confined karstic aquifers subjected to intensive exploitation, and to develop additional efforts towards monitoring their subsidence evolution. We analyze subsidence related to intensive use of groundwater in a confined karstic aquifer, through the use of...article 2018
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Ruiz-Armenteros, A.M. (author), Lazecky, M. (author), Hlavacova, I. (author), BakoAaˆ, M. (author), manuel Delgado, J. (author), Sousa, J.J. (author), Lamas-Fernandez, F. (author), Marchamalo, M. (author), Caro-Cuenca, M. (author), Papco, J. (author), Perissin, D. (author)Dams require continuous security and monitoring programs, integrated with visual inspection and testing in dam surveillance programs. New approaches for dam monitoring focus on multi-sensor integration, taking into account emerging technologies such as GNSS, optic fiber, TLS, InSAR techniques, GBInSAR, GPR, that can be used as complementary data...conference paper 2018
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- Heiligers, M.J.C. (author), Huizing, A.G. (author) conference paper 2018
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Bekers, D.J. (author), Jacobs, S. (author), Bolt, R.J. (author), Monni, S. (author), Fortini, D. (author), Germani, C. (author), Capece, P. (author), Toso, G. (author)In this paper a novel sparse layout for the radiating aperture of a Ka-band spaceborne SAR is outlined. Starting from a set of typical requirements and the definition of a benchmark antenna, an approach to achieve sparsity (in terms of the number of active modules) is proposed, which reduces significantly the fill factor as compared to the...conference paper 2017
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Ruiz-Constán, A. (author), Ruiz-Armenteros, A.M. (author), Lamas-Fernández, F. (author), Martos-Rosillo, S. (author), Delgado, J.M. (author), Bekaert, D.P.S. (author), Sousa, J.J. (author), Gil, A.J. (author), Caro Cuenca, M. (author), Hanssen, R.F. (author), Galindo-Zaldívar, J. (author), Sanz de Galdeano, C. (author)This study uses the InSAR technique to analyse ground subsidence due to intensive exploitation of an aquifer for agricultural and urban purposes in the Montellano town (SW Spain). The detailed deformation maps clearly show that the spatial and temporal extent of subsidence is controlled by piezometric level fluctuations and the thickness of...article 2016
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- Otten, M. (author), Vlothuizen, W. (author), Spreeuw, H. (author), Varbanescu, A. (author) conference paper 2016
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Jacobs, S. (author), Bekers, D. (author), Monni, S. (author), Otten, M. (author), Van Rossum, W. (author), Gerini, G. (author), Germani, C. (author), Fortini, D. (author), Toso, G. (author)This contribution addresses the problem of designing a sparse active array antenna for spaceborne SAR applications at Ka-band. The main driver for the design is limiting the recurring manufacturing costs associated to the number of active modules, while preserving main performance and insuring a certain level of industrial feasibility. A sparse...conference paper 2015
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Otten, M.P.G. (author), van Rossum, W.L. (author), van der Graaf, M.W. (author), Vlothuizen, W.J. (author), Tan, R.G. (author)An X-band Digital Array Synthetic Aperture Radar for a Short Range Tactical UAV is presented. The Frequency Modulated Continuous Wave radar principle in combination with digital beam forming over 24 receive channels is used to achieve low power and advanced imaging SAR capabilities on small platform. Novel SAR imaging modes are discussed, and...conference paper 2014
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van der Graaf, M.W. (author), Otten, M.P.G. (author), Huizing, A.G. (author), Tan, R.G. (author), Caro Cuenca, M. (author), Ruizenaar, M.G.A. (author)An X-band Digital Array Synthetic Aperture Radar for a Short Range Tactical UAV is presented. This system is demonstrated on a manned helicopter and motor glider. The Frequency Modulated Continuous Wave radar principle in combination with digital beam forming over 24 receive channels is used to meet the stringent payload requirements of Tactical...conference paper 2013
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Fokker, P.A. (author), Wassing, B.B.T. (author), van Leijen, F.J. (author), Hanssen, R.F. (author), Nieuwland, D.A. (author)This paper reports a study on the use of satellite radar data to constrain the subsurface model parameters of the Bergermeer gas field. Using PSI (Persistent Scatterer InSAR) technology, ascending and descending data were applied in line-of-sight geometry, i.e., without first unravelling the horizontal and vertical components of the signal. The...conference paper 2013
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Otten, M.P.G. (author), van Rossum, W.L. (author), Tan, R. (author), Vlothuizen, W.J. (author), de Wit, J.J.M. (author)A lightweight radar system, suitable for use on board small airborne platforms, has been built and tested. The radar system comprises a digital receive array, offering full beam forming flexibility at the cost of high data rates and heavy processing loads. In this paper, the requirements and architecture for multi-channel SAR processing are...conference paper 2013
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van Rossum, W.L. (author), Otten, M.P.G. (author), van Dorp, Ph. (author)A light weight SAR, suitable for use on short range tactical UAV, has been designed and built. The system consists of a fully digital receive array, and a very compact active transmit antenna. The approximate weight of the complete system is 6 kg, with power consumption below 75 W, depending on the required data acquisition volume. This X-band...conference paper 2012
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Engelen, S. (author), van den Oever, M. (author), Mahapatra, P.S. (author), Sundaramoorthy, P.P. (author), Gill, E.K.A. (author), Meijer, R.J. (author), Verhoeven, C.J.M. (author)Nano-satellites have a cost advantage due to their low mass and usage of commercial-off-the-shelf technologies. However, the low mass also restricts the functionality of a nano-satellite's payload. Typically, this would imply instruments with very low to low resolution and accuracy, essentially ruling out applications such as remote sensing....conference paper 2012
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Engelen, S. (author), van den Oever, M. (author), Mahapatra, P. (author), Sundaramoorthy, P. (author), Gill, E. (author), Meijer, R.J. (author), Verhoeven, C. (author)Nano-satellites have a cost advantage due to their low mass and usage of commercial-off-the-shelf technologies. However, the low mass also restricts the functionality of a nano-satellite's payload. Typically, this would imply instruments with very low to low resolution and accuracy, essentially ruling out applications such as remote sensing....conference paper 2012
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van Halsema, D. (author), Otten, M.P.G. (author), Maas, A.P.M. (author), Bolt, R.J. (author), Anitori, L. (author)Synthetic Aperture Radar (SAR) systems are becoming increasingly important sensors in as well the military environment as in the civilian market. In this keynote presentation an overview will be given over more than 2 decades of SAR system∼ and SAR application development at TNO in the Netherlands. The overview will highlight some...conference paper 2011
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Dekker, R.J. (author)After a disaster such as an earthquake or tsunami it is important to know quickly the dimensions of the damage to human relief work and crisis management. To study the utility of high-resolution radar damage-assessment for this purpose, pre- and post-seismic TerraSAR-X and Cosmo-SkyMed data of the earthquake in Haiti on 12 January 2010 were...article 2011
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Dekker, R.J. (author), van den Broek, A.C. (author)Within the GMES initiative, several projects focus on supporting the European Union Common Foreign and Security Policy (CFSP) and the Common Security and Defence Policy (CSDP). Two of them are GMOSS (2004-2008) and, addressed in this paper, G-MOSAIC (2009-2011). GMOSS was the predecessor of G-MOSAIC. An important issue in GMOSS was to connect...bookPart 2011
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Dekker, R.J. (author), van der Broek, A.C. (author)Within the GMES initiative, several projects focus on supporting the European Union Common Foreign and Security Policy (CFSP) and the Common Security and Defence Policy (CSDP). Two of them are GMOSS (2004-2008) and, addressed in this paper, GMOSAIC (2009-2011). GMOSS was the predecessor of G-MOSAIC. An important issue in GMOSS was to connect the...conference paper 2011
Searched for: subject%3A%22Synthetic%255C%2BAperture%255C%2Bradar%22
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