Searched for: subject%3A%22Synthetic%255C%2Baperture%255C%2Bradar%22
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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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TNO Defensie en Veiligheid (author), Lidicky, L. (author)
Moving target indication (MTI) using radar is of great interest in civil and military applications. Its uses include airborne or space-borne surveillance of ground moving vehicles (cars, trains) or ships at sea, for instance. Airborne (space-borne) radar offers several advantages when compared to optical imaging, they include: day-and-night, all...
doctoral thesis 2010
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Raucoules, D. (author), Bourgine, B. (author), de Michele, M. (author), Le Cozannet, G. (author), Closset, L. (author), Bremmer, C. (author), Veldkamp, H. (author), Tragheim, D. (author), Bateson, L. (author), Crosetto, M. (author), Agudo, M. (author), Engdahl, M. (author), TNO Bouw en Ondergrond (author)
This article presents the main results of the Persistent Scatterer Interferometry Codes Cross Comparison and Certification for long term differential interferometry (PSIC4) project. The project was based on the validation of the PSI (Persistent Scatterer Interferometry) data with respect to levelling data on a subsiding mining area near Gardanne...
article 2009
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Dekker, R.J. (author), Kuenzer, C. (author), Lehner, M. (author), Reinartz, P. (author), Niemeyer, I. (author), Nussbaum, S. (author), Lacroix, V. (author), Sequeira, V. (author), Stringa, E. (author), Schöpfer, E. (author), TNO Defensie en Veiligheid (author)
In this chapter a wide range of change detection tools is addressed. They are grouped into methods suitable for optical and multispectral data, synthetic aperture radar (SAR) images, and 3D data. Optical and multispectral methods include unsupervised approaches, supervised and knowledge-based approaches, pixel-based and object-oriented...
bookPart 2009
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Lidicky, L. (author), Hoogeboom, P. (author), TNO Defensie en Veiligheid (author)
This paper shows how the signal model that is commonly used as a starting point in multi-channel Space Time Adaptive Processing (STAP) for airborne Moving Target Indication (MTI) formally corresponds to a model that can be derived from a bi-static Synthetic Aperture Radar (SAR) model extended for multiple channels. With the help of this...
conference paper 2009
document
Vlothuizen, W.J. (author), Ditzel, M. (author), TNO Defensie en Veiligheid (author)
This paper presents a brute force method to perform real-time SAR processing. The method has several advantages over traditional so-called fast SAR implementations, as it does not make any approximations to alleviate the processing burden. However, the method does allow efficient implementation on multi-core platforms. It is implemented on a...
conference paper 2009
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TNO Defensie en Veiligheid (author), Smits, F.M.A. (author), de Wit, J.J.M. (author), van Rossum, W.L. (author), Maas, A.P.M. (author), Bolt, R.J. (author), Lievers, C.M. (author)
An experimental radar system is described that is designed to determine a building map in three dimensions by driving past the building with the radar mounted on a vehicle. The radar system, SAPPHIRE, produces full polarimetric reflectivity data in three dimensions with a voxel resolution of <0.5 m in each direction at 10 m distance. SAPPHIRE...
conference paper 2009
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Dekker, R.J. (author), TNO Defensie en Veiligheid (author)
This paper describes a method for the extraction of road networks from radar images. Three phases can be distinguished: (1) detection of road lines, (2) network building, and (3) network fusion. The method has been demonstrated on two radar images, one urban and one rural. Despite the differences, the procedure was able to cover a large part of...
conference paper 2008
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Lidicky, L. (author), TNO Defensie en Veiligheid (author), IEEE (author)
The purpose of this paper is to propose a new way to detect victims buried in or under layers of rubble or debris in case of disasters such as earthquakes, fires or terrorist attacks. The method is based on Fourier Processing and Principal Component Analysis (PCA). It utilizes a moving array of sensors arranged in the line of motion. It combines...
conference paper 2008
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Meta, A. (author), Hoogeboom, P. (author), Ligthart, L.P. (author)
The combination of frequency-modulated continuous-wave (FMCW) technology and synthetic aperture radar (SAR) techniques leads to lightweight cost-effective imaging sensors of high resolution. One limiting factor to the use of FMCW sensors is the well-known presence of nonlinearities in the transmitted signal. This results in contrast- and range...
article 2007
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TNO Defensie en Veiligheid (author), van den Broek, A.C. (author), Dekker, R.J. (author)
Radar satellites are important for geospatial intelligence about urban areas and urban situational awareness, since these satellites can collect data at day and night and independently of weather conditions ensuring that the information can be obtained at regular intervals and in time. For this purpose we have applied change detection techniques...
conference paper 2007
document
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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Meta, A. (author), Hoogeboom, P. (author), Ligthart, L.P. (author), TNO Defensie en Veiligheid (author)
The limiting factor to the use of Frequency Modulated Continuous Wave (FMCW) technology with Synthetic Aperture Radar (SAR) techniques to produce lightweight, cost effective, low power consuming imaging sensors with high resolution, is the well known presence of non-linearities in the transmitted signal. This results in contrast and range...
conference paper 2006
document
Meta, A. (author), Hoogeboom, P. (author), Ligthart, L.P. (author)
The combination of Frequency Modulated Continuous Wave (FMCW) technology and Synthetic Aperture Radar (SAR) leads to lightweight, cost-effective imaging sensors of high resolution. In FMCW SAR applications the conventional stop-and-go approximation used in pulse radar algorithms can be not valid anymore, therefore the motion within the sweep...
conference paper 2006
document
de Wit, J.J.M. (author), Meta, A. (author), Hoogeboom, P. (author), TNO Defensie en Veiligheid (author)
The combination of compact frequency-modulated continuous-wave (FM-CW) technology and high-resolution synthetic aperture radar (SAR) processing techniques should pave the way for the development of a lightweight, cost-effective, high-resolution, airborne imaging radar. Regarding FM-CW SAR signal processing, the motion during the transmission of...
article 2006
document
TNO Defensie en Veiligheid (author), Meta, A. (author), Hoogeboom, P. (author), Ligthart, L.P. (author)
This paper presents a novel approach for processing data acquired with Frequency Modulated Continuous Wave (FMCW) dechirp-on-receive systems by using a non-linear frequency scaling algorithm. The range frequency non-linearity correction, the Doppler shift induced by the continuous motion and the range migration removal are performed at the same...
conference paper 2006
document
Meta, A. (author), Hoogeboom, P. (author), TNO Defensie en Veiligheid (author)
For airborne earth observation applications, there is a special interest in lightweight, cost effective, imaging sensors of high resolution. The combination of Frequency Modulated Continuous Wave (FMCW) technology and Synthetic Aperture Radar (SAR) techniques can lead to such a sensor. In this paper, a developed algorithm for SAR imaging that...
conference paper 2005
document
Lorga, J.F.M. (author), Chu, Q.P. (author), van Rossum, W.L. (author), Mulder, J. (author), TNO Defensie en Veiligheid (author)
The demanding requirements of a new miniaturized synthetic aperture radar (MiniSAR) system, adaptable to different types of data according to prevailing conditions, led these researchers to implement an extended Kalman Filter that can process diverse combinations of GNSS observables using different types of positioning. The system shows promise...
article 2005
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Gerini, G. (author), Bruni, S. (author), Neto, A. (author), Maci, S. (author), TNO Defensie en Veiligheid (author)
A novel type of broadband integrated array scanning in one plane is proposed. Such arrays are aimed to meet the requirements typically set for airborne Synthetic Aperture Radars, while allowing the highest degree of integration between the T/R modules and radiating elements. The array is composed by broad-band leaky-wave slot elements radiating...
conference paper 2005
document
Quesson, B.A.J. (author), Schippers, P. (author), Groen, J. (author), Sabel, J.C. (author), Driessen, F.P.G. (author), TNO Defensie en Veiligheid (author)
The underwater acoustics group at TNO Defense, Security and Safety has developed two simulation software programs named ALMOST and SIMONA. The first is already commercially used and aims at sonar performance prediction, whereas the second one is used as a tool to generate simulated data for mine hunting scenarios with the aim to test different...
conference paper 2005
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