Searched for: subject%3A%22ED%255C%2B%255C-%255C%2BElectronic%255C%2BDefence%22
(1 - 20 of 102)
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Ullwer, C. (author), Sprung, D. (author), van Eijk, A.M.J. (author), Gunter, W. (author), Stein, K. (author)Atmospheric turbulence impacts on the propagation of electro-optical radiation. Typical manifestations of optical turbulence are scintillation (intensity fluctuations), beam wander and (for laser systems) reduction of beam quality. For longer propagation channels, it is important to characterize the vertical and horizontal distribution ...conference paper 2018
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- Mohammed, S. (author), Schoolderman, A.J. (author) conference paper 2018
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Calmet, I. (author), Mestayer, P.G. (author), van Eijk, A.M.J. (author), Herlédant, O. (author)We complete the analysis of the data obtained during the experimental campaign around the semi circular bay of Quiberon, France, during two weeks in June 2006 (see Part 1). A reanalysis of numerical simulations performed with the Advanced Regional Prediction System model is presented. Three nested computational domains with increasing horizontal...article 2017
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Sprung, D. (author), van Eijk, A.M.J. (author), Günter, W. (author), Griffith, D. (author), Eisele, C. (author), Sucher, E. (author), Seiffer, D. (author), Stein, K. (author)Atmospheric turbulence impacts on the propagation of electro-optical radiation. Typical manifestations of optical turbulence are scintillation (intensity fluctuations), beam wander and (for laser systems) reduction of beam quality. For longer propagation channels, it is important to characterize the vertical and horizontal distribution ...conference paper 2017
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Schwenger, F. (author), van Eijk, A.M.J. (author)The knowledge of the optical contrast of an oil layer on the sea under various surface roughness conditions is of great interest for oil slick monitoring techniques. This paper presents a 3D simulation of a dynamic sea surface contaminated by a floating oil film. The simulation considers the damping influence of oil on the ocean waves and its...conference paper 2017
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Tedeschi, G. (author), van Eijk, A.M.J. (author), Piazzolla, J. (author), Kusmierczyk-Michulec, J.T. (author)Sea-salt aerosol concentrations in the coastal zone are assessed with the numerical aerosol-transport model MACMod that applies separate aerosol source functions for open ocean and the surf zone near the sea–land transition. Numerical simulations of the aerosol concentration as a function of offshore distance from the surf zone compare...article 2017
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Sprung, D. (author), Sucher, E. (author), Eisele, C. (author), Seiffer, D. (author), van Eijk, A.M.J. (author), Stein, K. (author)Electro-optical and laser systems are presently deployed in naval operations around the world. The performance of these systems is negatively affected by optical turbulence in the atmosphere, quantified by the parameter Cn 2. The strength of the integrated optical turbulence Cn 2 was investigated for several coastal locations in different...conference paper 2017
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van Binsbergen, S.A. (author), Grossmann, P. (author), Cohen, L.H. (author), van Eijk, A.M.J. (author), Stein, K.U. (author)This paper compares in-situ and path-averaged measurements of the electro-optical transmission, with emphasis on aerosol effects. The in-situ sensors consisted of optical particle counters (OPC) and a visibility meter, the path-averaged data was provided by a 7-wavelength transmissometer (MSRT) and a scintillometer (BLS). Data was collected at a...conference paper 2017
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van Binsbergen, S.A. (author), van Zelderen, B. (author), Veraar, R.G. (author), Bouquet, F. (author), Halswijk, W.H.C. (author), Schleijpen, H.M.A. (author)In performance prediction of IR sensor systems for missile detection, apart from the sensor specifications, target signatures are essential variables. Very often, for velocities up to Mach 2-2.5, a simple model based on the aerodynamic heating of a perfect gas was used to calculate the temperatures of missile targets. This typically results in...conference paper 2017
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Dijk, J. (author), Bijl, P. (author), Oppeneer, M. (author), ten Hove, R.J.M. (author), van Iersel, M. (author)The Electro-Optical Signal Transmission and Ranging (EOSTAR) model is an image-based Tactical Decision Aid (TDA) for thermal imaging systems (MWIR/LWIR) developed for a sea environment with an extensive atmosphere model. The Triangle Orientation Discrimination (TOD) Target Acquisition model calculates the sensor and signal processing effects on...conference paper 2017
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Theil, A. (author), Tan, R.G. (author), Boschma, J.J. (author), Jacobs, S. (author)The usage of radar system modeling in the radar resource manager (RRM) or in the resource manager of a suite of sensors is discussed. Multiple ways to monitor the validity of the models are identified. The capability of such models to predict estimated elevation angle under anomalous propagation conditions has been investigated. Satisfactory...conference paper 2017
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Deiana, D. (author), Nennie, F. (author), Boekema, R.B. (author), van Rossum, W. (author), Monni, S. (author)N-path filters exploiting switched-series-R-C networks can realize high-Q blocking-tolerant band-pass filters. Moreover, their center frequency is flexibly programmable by a digital clock. Unfortunately, the time variant nature of these circuits also results in unwanted signal folding. This paper proves analytically that folding can be reduced...conference paper 2017
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Woelders, H. (author), de Wit, A. (author), Lourens, A. (author), Stockhofe, N. (author), Engel, B. (author), Hulsegge, I. (author), Schokker, D. (author), van Heijningen, P. (author), Vossen, S. (author), Bekers, D.J. (author), Zwamborn, A.P.M. (author)The objective of this study is to investigate possible biological effects of radiofrequency electromagnetic fields (RF-EMF) as used in modern wireless telecommunication in a wellcontrolled experimental environment using chicken embryo development as animal model. Chicken eggs were incubated under continuous experimental exposure to GSM (1.8 GHz)...article 2017
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- Naus, H.W.L. (author), Versluis, R. (author) article 2017
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van Eijk, A.M.J. (author), Stein, K. (author)This paper reviews three phenomena that affect the propagation of electro-optical radiation through the atmosphere: absorption and scattering, refraction and turbulence. The net effect on imaging or laser systems is a net reduction of the effective range, or a degradation of the information contained in the electro-optical radiation. Recent...conference paper 2017
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Sprung, D. (author), Grossmann, P. (author), Sucher, E. (author), van Eijk, A.M.J. (author), Stein, K. (author)Operation and design of electro-optical systems are affected by atmospheric turbulence, quantified by refractive structure function parameter Cn 2. The long-term VerTurM experiment at a rural site in Northwestern Germany served to collect an extended dataset of vertical profiles of Cn 2 values up to 64 meters, completed by a characterization of...conference paper 2017
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van Binsbergen, S.A. (author), Grossmann, P. (author), February, F.J. (author), Cohen, L.H. (author), van Eijk, A.M.J. (author), Stein, K.U. (author)This paper compares in-situ and path-averaged measurements of the electro-optical transmission, with emphasis on aerosol effects. The in-situ sensors consisted of optical particle counters (OPC), the path-averaged data was provided by a 7-wavelength transmissometer (MSRT) and scintillometers (BLS). Data were collected at two sites: a homogeneous...conference paper 2017
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Kuzniar, A. (author), Laffeber, C. (author), Eppink, B. (author), Bezstarosti, K. (author), Dekkers, D. (author), Woelders, H. (author), Zwamborn, A.P.M. (author), Demmers, J. (author), Lebbink, J.H.G. (author), Kanaar, R. (author)The potential effects of non-ionizing electromagnetic fields (EMFs), such as those emitted by power-lines (in extremely low frequency range), mobile cellular systems and wireless networking devices (in radio frequency range) on human health have been intensively researched and debated. However, how exposure to these EMFs may lead to biological...article 2017
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Vogelbacher, S. (author), van Eijk, A.M.J. (author), Sprung, D. (author), Cohen, L.H. (author), Sucher, E. (author), Stein, K. (author)A transmission experiment has been performed over an optical path of 1.53 km at a rural test site in Meppen, Northwest Germany. Direct transmission measurements were made by a 7-wavelength transmissometer. Transmission was further estimated from the average voltage received by a BLS2000 scintillometer, and evaluated with Mie theory from in-situ...conference paper 2016
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Schleijpen, R. (author), van Putten, F.J.M. (author)This paper presents experimental work on the use of a CO2 laser for triggering of PIR sensors. Pyro-electric InfraRed sensors are often used as motion detectors for detection of moving persons or objects that are warmer than their environment. Apart from uses in the civilian domain, also applications in improvised weapons have been encountered....conference paper 2016
Searched for: subject%3A%22ED%255C%2B%255C-%255C%2BElectronic%255C%2BDefence%22
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