Searched for: author%3A%22van+Halsema%2C+D.%22
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van Persie, M. (author), Hoogeboom, P.J. (author), Vroeijenstijn, R. (author), van Halsema, D. (author)
report 2011
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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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van Persie, M. (author), Hoogeboom, P.J. (author), Vroeijenstijn, R. (author), van Halsema, D. (author)
report 2011
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van Persie, M. (author), Hoogeboom, P.J. (author), Vroeijenstijn, R. (author), van Halsema, D. (author)
report 2011
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van den Broek, A.C. (author), Neef, R.M. (author), Hanckmann, P. (author), van Gosliga, S.P. (author), van Halsema, D. (author)
In present-day military security operations threats are more difficult to reveal than in conventional warfare theatres, since they take place during the course of normal life. These maritime missions often take place in littoral environments, where acts of piracy, drug trafficking and other threatening events become obscured in the crowd of...
conference paper 2011
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van Halsema, D. (author), de Jongh, R.V. (author), van Es, J. (author), Otten, M.P.G. (author), Vermeulen, B.C.B. (author), van Liempt, L.J. (author), TNO Defensie en Veiligheid (author)
Modern airborne ground surveillance radar systems are increasingly based on Active Electronically Scanned Array (AESA) antennas. Efficient use of array technology and the need for radar solutions for various airborne platforms, manned and unmanned, leads to the design of scalable radar systems. The design and realisation of such a system is...
conference paper 2008
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TNO Defensie en Veiligheid (author), Otten, M.P.G. (author), Vermeulen, B.C.B. (author), van Liempt, L.J. (author), van Halsema, D. (author), de Jongh, R.V. (author), van Es, J. (author)
Modern airborne ground surveillance radar systems are increasingly based on Active Electronically Scanned Array (AESA) antennas. Efficient use of array technology and the need for radar solutions for various airborne platforms, manned and unmanned, leads to the design of scalable radar systems. The design and realisation of such a system is...
conference paper 2008
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Lorga, J.F.M. (author), Chu, Q.P. (author), Mulder, J.A. (author), van Halsema, D. (author), TNO Defensie en Veiligheid (author)
In this paper, the authors propose to introduce and describe a newly developed precise tightly-coupled integrated navigation system. The performed experiments with the purpose of evaluating the system performance are shown. A complete description of the integrated navigation system hardware, including calibration details, and software, with...
conference paper 2005
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TNO Defensie en Veiligheid (author), van Rossum, W.L. (author), Grooters, R. (author), van Halsema, D. (author), Lorga, J.F.M. (author), Otten, M.P.G. (author), Vermeulen, B.C.B. (author), Vlothuizen, W.J. (author)
A small SAR-MTI system is being developed at TNO, aimed at deployment on tactical UAV, such as the SPERWER, in use with the Royal Netherlands Army. The system makes use of modern front-end technology, to provide flexible SAR imaging and MTI modes. Major design goals are 40 kg weight, 500 W power consumption and 50 cm resolution in order to...
conference paper 2005
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Lorga, J.F.M. (author), van Rossum, W.L. (author), van Halsema, D. (author), Chu, Q.P. (author), Mulder, J.A. (author)
In this paper, the authors propose to describe the development process of a navigation system, concerning Syntectic Aperture Radar (SAR) applications, starting from the motivation for the sensor selection and finalizing with the first flight-test results. Sensors selection was one of the first steps in the design. Motivations for the...
conference paper 2004
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Groot, J.S. (author), van Halsema, D. (author), van Maarseveen, R.A. (author), Otten, M.P.G. (author), TNO Fysisch en Elektronisch Laboratorium (author)
An urgent need exists for accurate deformation measurements for the purpose of risk management. SAR interferometry can be used to measure small deformations. An experiment was carried out with the PHARUS C-band system in 1999-2000. The dike that was the subject of this experiment deforms at a rate of approximately one centimeter per month due to...
conference paper 2001
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Steeghs, T.P.H. (author), van Halsema, D. (author), Hoogeboom, P. (author), TNO Fysisch en Elektronisch Laboratorium (author)
TNO-FEL is developing a miniature, lightweight, low cost, and scalable SAR/MTI system called 'MiniSAR'. The MiniSAR system will be unique in its size and architecture. Initially the demonstrator system will be integrated in a two-seater motorglider platform. Wherever possible, commercial-off-the-shelf (COTS) products are being used. This paper...
conference paper 2001
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Groot, J.S. (author), van Halsema, D. (author), van Maarseveen, R.A. (author), Blommaart, P.J.L. (author), Kruse, G.A.M. (author), van Loon, D. (author), Hanssen, R.F. (author), Samson, J. (author), Striegel, A.J. (author), Visser, J.M.P.C.M. (author), TNO Fysisch en Elektronisch Laboratorium (author)
Deformation measurements are important in the field of ground engineering. Deformation can have a non-natural cause (e.g., surface deformation due to tunnel construction) or a natural one (e.g., dike deformation due to a high water level). Radar interferometry can in principle provide deformations with millimetre to centimetre accuracy over...
report 2001
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TNO Fysisch en Elektronisch Laboratorium (author), van Bree, R.J.P. (author), Gens, R. (author), Groot, J.S. (author), van Halsema, D. (author), Hanssen, R.F. (author), van den Hout, P. (author), Klees, R. (author), de Min, E.J. (author), Schrama, E.J.O. (author), Usai, S. (author)
report 2000
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TNO Fysisch en Elektronisch Laboratorium (author), Groot, J.S. (author), van Halsema, D. (author), Blommaart, P.J.L. (author), Husti, G.J. (author), Kruse, G.A.M. (author), van Loon, D. (author), Samson, J. (author), Schrama, E.J.O. (author), Striegel, A.J. (author), Visser, J.M.P.C.M. (author)
report 2000
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Greidanus, H.S.F. (author), Huising, E.J. (author), Platschorre, Y. (author), van Bree, R.J.P. (author), van Halsema, D. (author), Vaessen, E.M.J. (author), TNO Fysisch en Elektronisch Laboratorium (author)
Digital elevation models (DEMs) are produced from airborne radar cross-track interferometric measurements. Radar DEMs recorded from perpendicular orientations are intercompared, and compared to DEMs derived from airborne laser altimetry
conference paper 1999
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TNO Fysisch en Elektronisch Laboratorium (author), van Rossum, W.L. (author), van Halsema, D. (author), Otten, M.P.G. (author), Hoogeboom, P. (author), Visser, J.M.P.C.M. (author), Pouwels, H. (author)
After the completion of the PHARUS polarimetric phased array SAR, an extensive prograrnme of data acquisition was carried out under the PHARUS Familiarisation Programme, a project for the National Remote Sensing Board (BCRS). The Familiarisation Programme has been aimed at the acquisition of PHARUS data to demonstrate the potential of the PHARUS...
conference paper 1999
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Janssen, P.A.E.M. (author), Wallbrink, H. (author), Calkoen, C.J. (author), van Halsema, D. (author), Oost, W.A. (author), Snoeij, P. (author), TNO Fysisch en Elektronisch Laboratorium (author)
In this paper a description is given of a physically based theoretical ocean backscatter model (called the VIERS-1 model) for intermediate incidence angles, and a comparison of its performance against the CMOD4 empirical model is made. The VIERS-1 scatterometer algorithm is based on a two-scale composite surface model which includes both...
article 1998
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Janssen, P.A.E.M. (author), Wallbrink, H. (author), Calkoen, C.J. (author), van Halsema, D. (author), Oost, W.A. (author), Snoeij, P. (author), TNO Fysisch en Elektronisch Laboratorium (author)
The VIERS-1 (Verification and Interpretation ERS-1) project has resulted in a new algorithm for the interpretation of the wind scatterometer, based on a physical model of air/sea/radar interaction in which the radar backscatter is calculated from wind and wave conditions. The model is inverted to obtain the wind from the radar backscatter. For...
article 1998
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TNO Fysisch en Elektronisch Laboratorium (author), Ritt-Fischer, M.R. (author), van Halsema, D. (author), Pouwels, H. (author), Wensink, G.J. (author)
ln recent years PHARUS, a phased array synthetic aperture radar airborne instrument, has been developed by a Dutch team of institutes. Now that the experimental value for PHARUS has been demonstrated, it is important to investigate the commercial potential of this instrument in an end-to-end system for operational services. ln the presented...
report 1998
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