Guidance of weapon systems relies on sensors to analyse targets signature. Defence weapon systems also need to detect then identify threats also using sensors. The sensors performance is very dependent on conditions e.g. time of day, atmospheric propagation, background ... Visible camera are very efficient for diurnal fine weather conditions, long wave infrared sensors for night vision, radar systems very efficient for seeing through atmosphere and/or foliage ... Besides, multi sensors systems, combining several collocated sensors with associated algorithms of fusion, provide better efficiency (typically for Enhanced Vision Systems). But this sophisticated systems are all the more difficult to conceive, assess and qualify. In that frame, multi sensors simulation is highly required.

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