The construction steps regarding a computer simulator implementation for an extended naval target as viewed by an ISAR system is presented in this paper. The analysis involves the build up of the associated conceptual model, the explanation of the applied modelling approach and the depiction of the utilised data exchange standard. Finally the verification, validation and quality focus issues of the simulator are discussed.

A stimulating problem in the generation of coherent countermeasures for high range resolution radar systems is the inclusion of angular glint effects in the preparation of the false target mask. Since angular glint is representative of extended naval targets, this inclusion increases the credibility factor of the decoy playback signal at the adversary radar-operator station. In this paper, the ability of an interferometric inverse synthetic aperture radar (InISAR) simulator to provide a proof of concept towards the clarification of this challenging task is ascertained. The solution consists of three novel vector representations of the generated data, which are proven to behave according to the laws of physics governing the glint phenomenon. The first depiction is the angular glint injection at the target which is followed by the representation of the wavefront distortion at the radar. A value-added time procession integration of the target in pure roll motion provides an expected by ISAR theory side-view image of the naval extended false target. The effectiveness of the proposed approach through verification and validation of the results by using the method of pictorial evidence is established. A final argument is raised on the usage of this software tool for actual obfuscation and deception actions for air defence at sea applications.

The formation steps leading to the creation of a computer simulator for an extended naval target as viewed by an approaching Interferometric Inverse Synthetic Aperture Radar (IF-ISAR) seeker sensor is presented in this paper. The conceptual model development, the modelling approach, the implementation results and the project success details are outlined. The novelty of this effort is the valueadded ability of the simulator to further treat the generated data for rate of change processing leading to the assembly of height information about the target under scrutiny which can be used either for friend-orfoe identification decisions or intelligent expendable decoy programming.

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Modern air defense at sea doctrines need to consider the emerging technology of software-defined radar. In this manner the surveillance and tracking abilities of imaging radar are implemented in software. Concurrently there exists the need to forge the other side of the same coin. The Software-defined Radar Countermeasure System (S-dRCS) might be a solution for confusing adversary radar operators. In this spirit the current contribution is the proof of concept for a S-dRCS special case called the Simulator-defined Radar Countermeasure System (Sim-dRCS). The simulator approach for imaging radar countermeasures is preferred because it provides a bespoke generation of the required signals valid for a diverse set of adversary observers, which are considered to be Inverse Synthetic Aperture Radar systems. The simulator receives input from the sensors of the Sim-dRCS and then crafts false targets matched to the heading and velocity vectors of the threat. In this case the countermeasure output is a battleship-class false naval target. The achievement of verisimility enhancement is the main requirement in order to support this deceptive stratagem.