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- Bierens, L.H.J. (author) doctoral thesis 1995
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Kampes, B.M. (author), Hanssen, R.F. (author)In the permanent scatterer technique of synthetic aperture radar interferometry, there is a need for an efficient and reliable nonlinear parameter inversion algorithm that includes estimation of the phase cycle ambiguities. Present techniques make use of a direct search of the solution space, treating the observations as deterministic and...journal article 2004
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De Wit, J.J.M. (author)In the field of airborne earth observation there is a special interest in lightweight, low cost imaging radars of high resolution. Such radar systems could play an essential role in small-scale earth observation applications such as the monitoring of dikes, watercourses or areas in which gas pipes or electrical power lines are buried. In order...doctoral thesis 2005
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Groen, J. (author)In recent years, sonar performance has mainly improved via a significant increase in array ap-erture, signal bandwidth and computational power. This thesis aims at improving sonar array processing techniques based on these three steps forward. In applications such as anti-submarine warfare and mine hunting motion of the sonar needs to be...doctoral thesis 2006
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Savelyev, T.G. (author), Yarovoy, A.G. (author), Ligthart, L.P. (author)This paper presents a 3-D imaging technique for an ultra-wideband (UWB) ground penetrating radar (GPR) with a single transmit antenna and a linear receive array. The video impulse GPR working in the frequency band of 0.3–3 GHz has been designed in IRCTR for landmine detection, i.e., for a near-field application. Installed on a vehicle it can...journal article 2008
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Nitti, D.O. (author), Hanssen, R.F. (author), recife, A. (author), Bovenga, F. (author), Milillo, G. (author), Nutricato, R. (author)Image alignment is without doubt the most crucial step in SAR Interferometry. Interferogram formation requires images to be coregistered with an accuracy of better than 1/8 pixel to avoid significant loss of phase coherence. Conventional interferometric precise coregistration methods for full-resolution SAR data (Single-Look Complex imagery, or...conference paper 2008
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Savelyev, T. (author), Zhuge, X. (author), Yang, B. (author), Aubry, P. (author), Yarovoy, A. (author), Ligthart, L. (author), Levitas, B. (author)This paper presents an experimental investigation of two approaches to short-range radar imaging at microwaves by means of ultra-wideband (UWB) technology. The first approach represents a classical synthetic aperture radar (SAR) that employs a transmit–receive antenna pair on mechanical scanner. The second one makes use of a multiple input...journal article 2010
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Fan, Y. (author), Snieder, R. (author), Slob, E. (author), Hunziker, J.W. (author), Singer, J. (author), Sheiman, J. (author), Rosenquist, M. (author)Controlled?source electromagnetics (CSEM) has been used as a de?risking tool in the hydrocarbon exploration industry. Although there have been successful applications of CSEM, this technique is still not widely used in the industry because the limited types of hydrocarbon reservoirs CSEM can detect. In this paper, we apply the concept of...journal article 2010
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Matgen, P. (author)The technique of active microwave remote sensing has made much progress toward its high potential to monitor water storage changes in terrestrial surface and subsurface water bodies at various spatial and temporal scales. The number of studies demonstrating the support these data can offer in hydrological and hydraulic model building, model...doctoral thesis 2011
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Montazeri, S. (author)For decades, spaceborne Synthetic Aperture Radar (SAR) interferometry has evolved into a widely used geodetic method for three-dimensional mapping and analysing the geophysical processes of the surface of the earth. Nevertheless, effects such as atmospheric disturbances, temporal and geometric decorrelation are considered as the main degrading...master thesis 2014
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Dolkens, D. (author)Sub-meter resolution satellite imagery serves a more and more important role in applications ranging from environmental protection, disaster response and precision farming to defence and security. Earth Observation at these resolutions has long been the realm of large and heavy telescopes. The costs of building and launching such systems are...master thesis 2015
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Wesselink, D.S. (author)Avalanches form a threat to people travelling in mountainous regions as well as for infrastructure and buildings. They cause around 250 fatalities annually worldwide. To limit the number of future fatalities, forecasting services are interested in knowledge on avalanche activity to verify their warning system. They rely on information about the...master thesis 2015
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Zhu, Xiao Xiang (author), Montazeri, Sina (author), Gisinger, Christoph (author), Hanssen, R.F. (author), Bamler, Richard (author)In this paper, we propose a framework referred to as 'geodetic synthetic aperture radar (SAR) tomography' that fuses the SAR imaging geodesy and tomographic SAR inversion (TomoSAR) approaches to obtain absolute 3-D positions of a large amount of natural scatterers. The methodology is applied on four very high resolution TerraSAR-X spotlight...journal article 2016
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Samiei Esfahany, S. (author), Martins, Joana E. (author), van Leijen, F.J. (author), Hanssen, R.F. (author)In recent years, new algorithms have been proposed to retrieve maximum available information in synthetic aperture radar (SAR) interferometric stacks with focus on distributed scatterers. The key step in these algorithms is to optimally estimate single-master (SM) wrapped phases for each pixel from all possible interferometric combinations,...journal article 2016
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Wieffering, Tristan (author), Arriëns, Roy (author)A system has been developed that utilises the techniques of Ultra Wideband and Synthetic Aperture Radar to produce top view images of a scene using measurements from the side. The system consists of the PulsON P410 radar module, a set of antennas, a moving platform and an imaging algorithm. This thesis will cover all the aspects of the data...bachelor thesis 2017
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Dheenathayalan, P. (author), Caro Cuenca, M. (author), Hoogeboom, P. (author), Hanssen, R.F. (author)In recent years, synthetic aperture radar interferometry has become a recognized geodetic tool for observing ground motion. For monitoring areas with low density of coherent targets, artificial corner reflectors (CRs) are usually introduced. The required size of a reflector depends on radar wavelength and resolution and on the required...journal article 2017
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Steele-Dunne, S.C. (author), McNairn, Heather (author), Monsivais-Huertero, Alejandro (author), Judge, Jasmeet (author), Liu, Pang Wei (author), Papathanassiou, Kostas (author)Observations from spaceborne radar contain considerable information about vegetation dynamics.The ability to extract this information could lead to improved soil moisture retrievals and the increased capacity to monitor vegetation phenology and water stress using radar data.The purpose of this review paper is to provide an overview of the...review 2017
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Cancrinus, Nick (author), Max, Gyula (author)Nowadays, localization of cars is mostly done using GPS. Some major disadvantages of this method are that it is not very accurate and that it cannot be used indoors. These disadvantages do not form a major problem when an active human driver is controlling the car, but will become more critical when the autonomy of vehicles increases. The goal...bachelor thesis 2017
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Koch, R. (author), De Gelder, L. (author)This thesis is part of the ”Ultra Wideband Synthetic Aperture Radar Imaging” project of the bachelor Electrical Engineering graduation program in the fourth quarter of the teaching year 2016-2017. Synthetic aperture radar (SAR) is used to make images of the environment of a car. These images are, in combination with GPS, needed to give an...bachelor thesis 2017
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Kwant, Martijn (author)The North Sea is known for its marine activities, which need ocean data for safe operations. The ocean surface is described using the two-dimensional wave spectrum. This ocean wave spectrum can be estimated using wave buoys, wave models or remote sensing techniques. Wave buoys and numerical models are known to contain inaccuracies, which...master thesis 2017