Searched for: author%3A%22Smith%2C+A.J.E.%22
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Dekker, R.J. (author), Bouma, H. (author), den Breejen, E. (author), van den Broek, A.C. (author), Hanckmann, P. (author), Hogervorst, M.A. (author), Mohamoud, A.A. (author), Schoemaker, R.M. (author), Sijs, J. (author), Tan, R.G. (author), Toet, A. (author), Smith, A.J.E. (author)
conference paper 2013
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Schutte, K. (author), Bomhof, F.W. (author), Burghouts, G.J. (author), van Diggelen, J. (author), Hiemstra, P. (author), van 't Hof, J. (author), Kraaij, W. (author), Pasman, K.H.W. (author), Smith, A.J.E. (author), Versloot, C.A. (author), de Wit, J.J. (author)
More and more sensors are getting Internet connected. Examples are cameras on cell phones, CCTV cameras for traffic control as well as dedicated security and defense sensor systems. Due to the steadily increasing data volume, human exploitation of all this sensor data is impossible for effective mission execution. Smart access to all sensor data...
conference paper 2013
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van den Broek, A.C. (author), den Breejen, E. (author), Dekker, R.J. (author), Smith, A.J.E. (author)
In this paper we have analyzed military and security requirements for surveillance. Using a data-set of wide swath SAR imagery for the English channel and high resolution SAR data for the Zeebrugge and Rotterdam harbour we have discussed if these requirements can be met by using this kind of data. The requirement to detect anomalous behaviour at...
conference paper 2012
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van den Broek, A.C. (author), Neef, R.M. (author), Hanckmann, P. (author), Smith, A.J.E. (author)
Because of global economic and socio-political changes, an increase of conflicts near the world's coastlines is anticipated. The littoral zone is characterized by intense regular vessel traffic. The conduct of Maritime Security Operations and Peace support Operations therefore means that navies have to control instead of dominate the sea,...
conference paper 2011
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van den Broek, A.C. (author), Deves, T.K.G. (author), Neef, R.M. (author), Smith, A.J.E. (author), TNO Defensie en Veiligheid (author)
In present-day military security operations threats are more difficult to reveal than inconventional warfare theatres, since they take place during the course of normal life. For example, during maritime missions in littoral environments, acts of piracy, drug trafficking and other threatening events become obscured in the crowd of everyday...
conference paper 2010
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TNO Defensie en Veiligheid (author), Smith, A.J.E. (author), Anitori, L. (author), Bergmans, J. (author), Colin, M.E.G.D. (author), van Iersel, M. (author), Liem, K.D. (author), Schwering, P.B.W. (author), van Sweeden, R. (author), Vullings, H.J.L.M. (author)
This paper gives an overview of research at TNO in the field of maritime situational awareness (MSA). Our expertise on radar, sonar, electro-optics, electronic support measures and tracking/fusion is typically employed for vessel detection and vessel anomaly detection. Illustrative examples of these applications are presented addressing the...
conference paper 2009
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TNO Defensie en Veiligheid (author), van den Broek, A.C. (author), Burghouts, G.J. (author), van den Broek, S.P. (author), Smith, A.J.E. (author), Hagen, R.A.J. (author), Anitori, L. (author), van Rossum, W. (author)
In current military operations threats should be monitored accurately. The use of sensors is indispensable for this purpose, for example with camera and radar systems. Using data from such systems we have studied automated procedures for extracting observable behavioral features of persons and groups, which can be associated with threats. We...
conference paper 2009
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Smith, A.J.E. (author), Anitori, L. (author), Gabban, A. (author), Mallorqui, J. (author), TNO Defensie en Veiligheid (author)
About one year of coastal AIS (Automatic Identification System) data are analysed for vessel behaviour. The data are obtained from thousands of vessels along the Dutch North Sea coast including the entrance to the main port of Rotterdam. Vessel behaviour is described by a number of basic indicators that can be obtained directly from the AIS...
conference paper 2008
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Smith, A.J.E. (author), TNO Defensie en Veiligheid (author)
Many geoscience applications of space‐borne Synthetic Aperture Radar (SAR) imagery require knowledge of the revisit time of the satellite at a location. In this paper, a practical method is presented for computing the revisit times of SAR satellites at any location on Earth. The method is based on the use of maps that give the number of imaging...
article 2007
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Smith, A.J.E. (author), TNO Defensie en Veiligheid (author)
About one week of AIS (Automatic Identification System) data are analysed to derive indicators for discriminating between suspect and fiducial vessels. This data is obtained from approximately 1100 vessels along the Dutch North Sea coast including the entrance to the main port of Rotterdam. The indicators are used to learn about normal vessel...
conference paper 2006
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Smith, A.J.E. (author), Chesworth, J. (author), Greidanus, H. (author), TNO Defensie en Veiligheid (author)
A ship detection algorithm is developed that uses Envisat ASAR imagery in alternating polarisation mode. From airborne data it is shown that of the two co-polarisations, HH is preferred over VV because of a larger ship-to-clutter ratio. Combining the HH and HV images of alternating polarisation mode, it is found that the correlation between the...
conference paper 2005
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van den Broek, A.C. (author), Smith, A.J.E. (author), van Dekker, R.J. (author), Steeghs, T.P.H. (author), TNO Fysisch en Elektronisch Laboratorium (author)
Results from a study for ground surveillance with synthetic aperture radar (SAR) are presented. In particular change detection performance as a function of resolution and target size is investigated using simulated and measured SAR data. For the simulation five homogeneous target sets with sizes varying from one to eight meter have been used and...
conference paper 2004
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van den Broek, A.C. (author), Smith, A.J.E. (author), Toet, A. (author), TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author)
A study is presented in which several representations of polarimetric SAR data were evaluated for the purpose of obtaining land use classification. Two methods comprising visual interpretation and an automatic procedure were used. For the study, fully polarimetric SAR data with a resolution of 3m were obtained with the Dutch PHARUS sensor from a...
article 2004
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Smith, A.J.E. (author), Melger, F.J. (author), TNO Fysisch en Elektronisch Laboratorium (author)
An empirical filter has been developed that uses the phase of the ASAR cross spectrum to detect slicks in the ENVISAT ASAR wave mode product. The filter has been tested on a partition of a set of simulated ASAR cross spectra distributed by ESA. Results show that variations of the crossspectral phase with wave number can effectively be used for...
article 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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Smith, A.J.E. (author), Gelsema, S.J. (author), Kester, L.J.H.M. (author), Melief, H.W. (author), Premel Cabic, G. (author), Theil, A. (author), Woudenberg, E. (author), TNO Fysisch en Elektronisch Laboratorium (author)
Doppler polarimetry in a surveillance radar for the maritime surface picture is considered. This radar must be able to detect low-RCS targets in littoral environments. Measurements on such targets have been conducted with a coherent polarimetric measurement radar in March 2001 and preliminary results from that campaign are presented. The system...
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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Smith, A.J.E. (author), van Bree, R.J.P. (author), Calkoen, C.J. (author), Dekker, R.J. (author), Otten, M.P.G. (author), van Rossum, W.L. (author), TNO Fysisch en Elektronisch Laboratorium (author)
PHARUS is a polarimetric phased array C-band Synthetic Aperture Radar (SAR), designed and built for airborne use. Advanced SAR (ASAR) data in image and alternating polarization mode have been simulated with PHARUS to demonstrate the use of Envisat for a number of typical SAR applications that are not possible with the ERS satellites. These...
report 2001
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TNO Fysisch en Elektronisch Laboratorium TNO Technische Menskunde (author), van den Broek, A.C. (author), Smith, A.J.E. (author), Toet, A. (author)
A study is presented in which several different representations of polarimetric SAR data for visual interpretation are evaluated. Using a group of observers the tasks 'land use classification' and 'object detection' were examined. For the study, polarimetric SAR data were used with a resolution of 3 meters. These data were obtained with the...
conference paper 2001
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van Rossum, W.L. (author), Otten, M.P.G. (author), Smith, A.J.E. (author), Groot, J.S. (author), TNO Fysisch en Elektronisch Laboratorium (author)
The PHARUS system is a fully polarimetric C-band SAR wíth an active phased array anrenna. PHARUS is an experimental system. It is meant for remote sensing research in many application areas, both civil and military, maritime and on land. The system performed its first test flight in 1995. In the following years a large amount of data was...
conference paper 2000
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