The MODENA project: Modeling and simulation of the maritime environment remotely sensed by radar

Garello, R.

doi:10.1109/oceans.2008.5151999

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…The MODENA 1 project aims at modeling and simulating the maritime environment remotely sensed by a radar [1], [2]. In this context, in order to build a realistic simulator of the sea clutter observed by a RAR (Real Aperture Radar), RAR backscattered field statistics are needed.…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Real Aperture Radar Field Backscattered From Sea Surfaces Under Moderate Winds by Monte Carlo Simulations

Pinel

Chapron²,

Bourlier³

et al. 2014

IEEE Trans. Geosci. Remote Sensing

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The statistical properties of the electromagnetic field backscattered from sea surfaces are studied by using asymptotic numerical methods. Sea surfaces are modeled by using the Elfouhaily et al. spectrum model. The influence of the radar spatial resolution on the field statistics is studied for various wind conditions and radar configurations, by considering equal range and azimuth resolutions. It is observed that the backscattered field phase can be assimilated to a uniform distribution and that the amplitude resembles a Rayleigh distribution. Moreover, reducing the radar spatial resolution d induces a stronger variability of the backscattered field amplitude and a departure from the Rayleigh distribution. This departure is enhanced particularly when the radar look approaches the cross-wind direction and also when increasing the wind speed. Also, a fitting of the amplitude distribution with various theoretical statistical laws (gamma, Weibull, K, and so on) highlights the general good fitting of the K distribution, which is in agreement with previous work led from measurements.

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Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Real Aperture Radar Field Backscattered From Sea Surfaces Under Moderate Winds by Monte Carlo Simulations

Pinel

Chapron²,

Bourlier³

et al. 2014

IEEE Trans. Geosci. Remote Sensing

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“…Being able to come up with a set of parameters allowing discriminating between breaking waves and small targets is another goal of this project. Finally, the goal is to incorporate all of the derived breaking wave models into a generic dynamic radar sea surface simulation platform [1], MODENA. The first section of this paper describes the experimental settings and some of the first results in terms of acquired data.…”

Section: Introductionmentioning

confidence: 99%

Breaking wave study from in situ experiments

Demoulin¹,

Garello²

2009

Oceans 2009-Europe

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This paper describes the setting of the experiment for in situ measurements of breaking waves. The aim is to provide an insight in the wave breaking mechanism and the possible outcome is a statistical description of this mechanism which will be used together with airborne radar (SAR) data acquired on the same spot. It is well known that when the sea-state is high (3 to 4) the radar clutter is displaying many spikes due to the breaking waves. So far this phenomenon is not correctly described and it is impairing the analysis of the sea surface, especially when possible targets are present.

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“…We present in this paper the simulation structure for the MODENA project [1] and illustrates what should become an original dynamical model for the reflectivity map of the sea surface. From our point of view, MODENA challenges to find accurate models for simulating dynamically interaction between sea state, sonar, radar and ship, while keeping physical coherency during the whole observation scenario (several tens of minutes), including human participation in such a virtual reality system [3].…”

Section: Introductionmentioning

confidence: 99%

“…To be able to autonomize models for such "in virtuo" experiments, follows a methodology named enactic [6]. Enactic results from more than ten years of modeling complex systems in our multidisciplinary research center 1 . It has been successfully applied in biology [7].…”

Section: Introductionmentioning

confidence: 99%

Autonomy based modeling for the simulation of ocean remote sensing

Parenthoën¹,

Belemaalem²

2008

Oceans 2008

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International audience— This article presents the simulation structure for the MODENA project [1] and illustrates what should become an original dynamical model for the reflectivity map of the sea surface. From our point of view, MODENA challenges to find accurate models for simulating dynamically interaction between sea state, sonar, radar and ship, while keeping physical coherency during the whole observation scenario (several tens of minutes), including human participation in this virtual reality system. To deal with such a complexity, as it is impossible and inappropriate to compute dynamically hydrodynamic, electromagnetic and acoustic equations on an accurate grid of points or mesh, MODENA simulation structure aims to use an autonomy based approach: the model of each phenomenon (wave, breaking, group, ship, wind, stream, transmitter, receiver...) involved in the simulation is seen as an autonomous entity, including an autonomy of time, space and scale. These models are combined and animated using enaction-based multi-agents simulation. In such simulation, computer activity is optimised at places where and when interaction occurs within revelant scale, according to choosen models. Furthermore, to add new phenomena or to modify existing models do not make previous work obsolete, as one has only to characterise interactions of new phenomena with previously defined models. This modeling approach facilitates interaction between research teams involved in the MODENA project, as the whole simulation results from the set of autono-mized models developed by each team in parallel. Such a virtual laboratory should help for example to better distinguish the signal of breaking from the signal of small boats, in the dynamical signature of sea-states. I. INTRODUCTION We present in this paper the simulation structure for the MODENA project [1] and illustrates what should become an original dynamical model for the reflectivity map of the sea surface. From our point of view, MODENA challenges to find accurate models for simulating dynamically interaction between sea state, sonar, radar and ship, while keeping physical coherency during the whole observation scenario (several tens of minutes), including human participation in such a virtual reality system [3]. In such a virtual laboratory, for example, one can easily compare a SAR " Omega-K " rebuilt image resulting from a lighning by a virtual X-band radar with a picture of the same virtual scene (Fig. 1). However most of classical simulations are based on a static sea surface description [4], thus can poorly deal with dynamical properties of the interacting localised phenomena involved, nor it can deal with unpredictable behaviour of human experimenters riding a boat or a plane in the scenario. Moreover, the computatio

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The MODENA project: Modeling and simulation of the maritime environment remotely sensed by radar

Cited by 8 publications

References 5 publications

Statistical Analysis of Real Aperture Radar Field Backscattered From Sea Surfaces Under Moderate Winds by Monte Carlo Simulations

Statistical Analysis of Real Aperture Radar Field Backscattered From Sea Surfaces Under Moderate Winds by Monte Carlo Simulations

Breaking wave study from in situ experiments

Autonomy based modeling for the simulation of ocean remote sensing

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