Ground Clutter Model for IED Electromagnetic Detection – MCIED

Stage 1: « Choice of an asymptotic model becomes generic of reference « The benchmark model « zero state « rest(base) on existing available in her(it) literature.Stage 2: « Elaboration of an exact digital model establish from and calibration of asymptotic model. The digital method rests(bases) on the method CRUSH developed by IETR Nantes which allows to enrich in a incremental way model him(it) asymptotic from a model digital technology of the ground and the purpose(object) elaborated from software based on Methods of Moments MoMStage 3: « Operation and Validation of the asymptotic model « It is a question of verifying that the model of impedance of surface adapts itself well to the size(format) of numeric(digital) models ready(in position) in 3D codes in finished differences ( FDTD) And to compare the incomes(results) with the experimental measures(measurements) supplied by TCS.Stage 4: « Setting-up(Presence) of the model of impedance of surface in a code of calculation digital « It is a question of exploiting(running) model to validate the torque(couple) Precision / Calculation time of asymptotic model and its precision to verify that the model of impedance of surface adapts itself well to the size(format) of the numeric(digital) models ready(in position) in 3D codes FDTD, and to compare the incomes(results) with the experimental measures(measurements) supplied by TCS.Stage 5: « exploitation(operation) of the incomes(results) for industrial simulations « The exploitations(operations) go as far as giving a first estimation of a torque(couple) {Probability of detection of a purpose(object) and a probability of false alarm}

Have models asymptotic the torque of which we draw to master Precision / Calculation time for future applications: real-time Calculation with the coefficient of reflection Simulation of scenes(stages) with the impedance of surface

All the domains involved in the electromagnetic detection of purposes(objects) in the neighbourhood of the ground in backscattering. Detection under shaving incidences of flush, ground purposes(objects) or buried (according to the operational application) with the impedance of surface

Poster ANR ASTRID MCIED - Forum de l’innovation DGA – CNIT La Défense – 27 novembre 2012

The objective of this project is to realize a numerical model for ground clutter which permit to calculate the back-scattering response of buried objects.
The aimed application is the electromagnetic detection of the wires of IED (Improvised Electronic Device; EEI explosive device Improvised in French), by a broadband (typically 10-3000 MHz) in monostatic configuration, installed on a mobile vehicle.

In order to size the ground backscattered signal, this ANR/ASTRID project suggests an original approach.

First of all, a rigorous model will be implemented. This model will take into account the shape of the ground by a stochastic approach, its dielectric parameters and the wire characteristics.

Then, it will serve as a reference to validate a so-called asymptotic model (introduction of simplifying assumptions), which can be split up into two coherent sub-model : a model of surface clutter cross-section So and a model of surface impedance Zs.

The surface clutter cross-section will have the advantage to require few computing resources, for real-time system treatments. The model of surface impedance will be afterward introduced into FDTD 3D numerical codes 3D in order to allow predictive calculations.

These works follow an internal study performed by Thales Communications, which will give to the study its results on the bibliography analysis and the preliminary measurements realized on open site, or perform within the framework of future campaigns in internal Thales or with DGA.