Simulation Modelling

Radar simulations perform a vital role in operator training, mission planning and development of tactics. Usually, in order to produce realistic displays, the simulations require highly specialised and detailed databases, typically at the spatial resolution of the radar. A large investment is necessary to establish these databases and resource limitations usually result in only a small area of coverage.

The approach we have adopted is to make use of whatever data is readily available, and then to 'fill in' the rest of the detail using stochastic modelling. The resulting radar displays are accurate to the level of detail present in the database, but do not have the sanitised appearance typical of simulations generated from sparse data. The stochastic modelling for the random detail uses techniques that include methods developed for virtual reality computer games. It is not intended to represent the real detail of the scene, but is typical of the sort of structure present is real scenes. Clearly, for some applications the real detail is important right down to the radar resolution, but in many cases typical scenes, which include the main gross features, are sufficient.

As with general scenes of clutter, specific targets can be simulated either from detailed databases or by using stochastic scattering methods for prominent features of the target shape.

The radar parameters, settings and signal processing are modelled along with the geometry and effects of the environment (propagation and weather etc.).

The simulation tools can be provided for operation stand-alone on a computer, or for integration with larger, multi-sensor simulations. Each supplied application is developed individually to the customer's needs and availability of databases, making use as appropriate of our generic simulation tools.

Example

The three images below show simulated SAR (synthetic aperture radar) images of an area of country park containing scattered wooded areas, individual trees and small buildings . The images are at a resolution of 3m, with grazing angles of 15°, 10° and 5°. As the grazing angle decreases, the obscuration and shadowing becomes more pronounced and the contrast increases. Detection of ground based targets in this terrain would clearly be compromised at 5°.

Click the images below to enlarge:

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