Searched for: subject%3A%22Radar%255C%2Bimaging%22
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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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de Jong, R.J. (author), Heiligers, M.J.C. (author), de Wit, J.J.M. (author), Uysal, F. (author)
Camera systems are widely used for surveillance in the security and defense domains. The main advantages of camera systems are their high resolution, their ease of use, and the fact that optical imagery is easy to interpret for human operators. However, particularly when considering application in the defense domain, cameras have some...
conference paper 2019
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Bryllert, T. (author), Svedin, J. (author), Karlsson, M. (author), Gandini, E. (author), Llombart, N. (author), Drakinskiy, V. (author), Stake, J. (author)
We present a 220 GHz imaging radar prototype that has been developed in the European Defense Agency (EDA) project TIPPSI. The purpose of the development was to demonstrate short-range high-resolution 3D imaging for security applications at checkpoints, and to guide the development of stand-off real-time millimeter wave and sub-millimeter wave...
conference paper 2018
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Heiligers, M.J.C. (author), Huizing, A.G. (author)
conference paper 2018
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de Wit, J.J.M. (author), van Rossum, W.L. (author)
Automated extraction of building features is a great aid in synthesizing building maps from radar data. In this paper, a model-based method is described to detect and classify canonical scatters, such as corners and planar walls, inside a building. Once corners and walls have been located, a building map can be synthesized. To detect and...
article 2016
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Vaddagiri, K. (author), Monni, S. (author), Neto, A. (author), Nennie, F. (author), van Rossum, W. (author)
This paper presents a novel ultra wide band (UWB) leaky slot antenna. The antenna has a wide impedance bandwidth from 3 to 14 GHz and it is suitable for radar applications requiring high resolution, phase center stability and good pulse preservation, such as medical imaging and ground penetrating radar. © 2013 EurAAP.
conference paper 2013
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Anitori, L. (author), Hoogeboom, P. (author), Le Chevalier, F. (author), Otten, M.P.G. (author)
In this paper we demonstrate how Compressive Sensing (CS) can be used in pulse-Doppler radars to improve the Doppler performance while preserving range resolution. We investigate here two types of stepped frequency waveforms, the coherent frequency bursts and successive frequency ramps, which can be used for high resolution range profiling....
conference paper 2012
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Anitori, L. (author), Otten, M.P.G. (author), Hoogeboom, P. (author)
In this paper we present results on application of Compressive Sensing (CS) to high resolution radar imaging and pro- pose the adaptive Complex Approximate Message Passing (CAMP) algorithm for image reconstruction. CS provides a theoretical framework that guarantees, under certain assumptions, reconstruction of sparse signals from many fewer...
conference paper 2012
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Anitori, L. (author), Otten, M.P.G. (author), Hoogeboom, P. (author), TNO Defensie en Veiligheid (author)
In this paper we present some preliminary results on the application of Compressive Sensing (CS) to high resolution radar imaging. CS is a recently developed theory which allows reconstruction of sparse signals with a number of measurements much lower than what is required by the Shannon sampling theorem. This method has already found its way in...
conference paper 2010
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TNO Defensie en Veiligheid (author), van Dorp, Ph. (author), Ebeling, R.P. (author), Huizing, A.G. (author)
High resolution radar imaging techniques can be used in ballistic missile defence systems to determine the type of ballistic missile during the boost phase (threat typing) and to discriminate different parts of a ballistic missile after the boost phase. The applied radar imaging technique is 2D Inverse Synthetic Aperture Radar (2D-ISAR) in which...
conference paper 2010
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Miorali, M. (author), Slob, E.C. (author), Arts, R.J. (author), TNO Bouw en Ondergrond (author)
A technique capable of capturing the dynamic of the reservoir fluids in the proximity of production wells would provide enormous benefit to the reservoir management; in fact, monitoring can be used to develop a feedback loop between measurements and control technologies to optimize the production. This paper examines the feasibility of a...
conference paper 2009
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van den Broek, A.C. (author), Dekker, R.J. (author), Gutjahr, K. (author), Raggam, H. (author), TNO Defensie en Veiligheid (author)
We have used high resolution optical satellite stereo data to generate a digital surface model containing building heights, so that 3-dimensional information is available for the purpose of urban situational awareness. In addition we have applied change detection techniques to Radarsat fine beam imagery with a resolution of 10 meters to find...
conference paper 2007
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van Rossum, W.L. (author), Otten, M.P.G. (author), van Bree, R.J.P. (author), TNO Defensie en Veiligheid (author)
The Phase Gradient Autofocus (PGA) algorithm is extended to work for synthetic aperture radar (SAR) spotlight images processed with range migration (ω-k) algorithms. Several pre-processing steps are proposed for aligning the range-compressed phase-history data needed for successful autofocusing of the data. The proposed algorithm gave good...
article 2006
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Greidanus, H. (author), Clayton, P. (author), Indregard, M. (author), Staples, G. (author), Suzuki, N. (author), Vachon, P. (author), Wackerman, C. (author), Tennvassas, T. (author), Mallorqui, J. (author), Kourti, N. (author), Ringrose, R. (author), Melief, H. (author), TNO Fysisch en Elektronisch Laboratorium (author)
The performances of eight satellite SAR ship detection systems (most of them operational) are compared, by running a benchmark test on RADARSAT images of various modes. No single system is best under all circumstances.
conference paper 2004
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Smith, A.J.E. (author)
When utilizing knowledge of the spacecraft trajectory for near real-time geocoding of Synthetic Aperture Radar (SAR) images, the main problem is that predicted satellite orbits have to be used, which may be in error by several kilometres. As part of the development of a Dutch autonomous mobile ground station to receive and process satellite SAR...
article 2003
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TNO Fysisch en Elektronisch Laboratorium (author), Steeghs, T.P.H. (author), Gelsema, S.J. (author)
The use of ISAR imagery for Automatic Target Recognition is seriously hampered by the difficulty of target motion compensation. Phase perturbations that result from target maneuvers during the processing interval need to be corrected for. In a previous paper, we demonstrated the use of the local Radon transform for estimating the radial velocity...
conference paper 2003
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Greidanus, H.S.F. (author), Otten, M.P.G. (author), TNO Fysisch en Elektronisch Laboratorium (author)
Polarimetric SAR imagery of a coastal scene is discussed, in terms of polarimetric and kinematic properties of waves on the sea and breaking waves in the surf zone. The coastal zone is a dynamic environment, and there is an increasing demand for monitoring it. Remote sensing can be an economic solution, and this paper explores some possibilities...
conference paper 2002
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Steeghs, P. (author), Kester, L. (author), Gelsema, S. (author)
The use of the Radon transform and the Wigner-Radon power spectrum for ISAR motion compensation is described. It is shown that the local Radon power spectrum is closely related to the Cohen's class of quadratic time-frequency representations in a similar way as the Radon and Fourier transform are related. The peak of the local Radon transform is...
conference paper 2002
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TNO Fysisch en Elektronisch Laboratorium (author), Smith, A.J.E. (author)
At present, gas pipeline networks in Europe are routinely monitored by vehicle and air patrols to protect them against damage by soil movement and third part interference. Because of the expenses, pipeline operators are investigating the possibilities to replace these traditional monitoring methods by remote sensing from space. A preliminary...
conference paper 2002
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Dekker, R. (author)
conference paper 2000
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