RiKA (Radar izi Kestrim ve Analiz) is a radar signature prediction tool based-on high frequency electromagnetics techniques. Design of stealthy platforms (such as planes, ships, and land vehicles) with low radar cross-section (RCS) values is a costly process. RiKA works on a CAD model of a structure to predict its radar signature. It relies mainly on geometrical optics, physical optics and first order diffraction techniques to accurately predict

• the RCS value
• the range profile
• scattering centers

of a platform for given frequencies and look angles. Material coatings on the platform are also taken into account. RiKA, by virtue of an added option, can be used in calculating the radiation pattern of high frequency antennas mounted on the platform.

RiKA uses unique approaches to efficiently produce accurate results. Multilevel geometric trees are used for accelerated convergence of ray tracing methods. Quasi-analytical methods are used to caculate the physical optics contributions from NURBS surfaces. Scattering-center extraction (or hot-spot identification) is performed by spread functions with optimum time-bandwidth products.

RiKA is under the process of being validated by open-range measurements of realistic platforms.

Radar signture reduction is a must in order to increase the battle-field effectiveness of any contemporary platform or long-range armament. The crucial step in radar signature reduction or stealth technologies is the determination of the radar signature of the platform under consideration. The following actions can be performed upon the determination of the signature:
• Shape changes can be affected for platforms under development,
• Radar absorbing coatings can be used on certain regions of the platform, and
• Strategic plans for approach-to-target patterns can be tailored.

The RiKA software analyzes the radar signature of any platform starting from its CAD model and provides all the necessary information to realize these actions.

• Capabilities
• Features
• Screen shot
• An article about RCS and stealth tecnologies (in Turkish)
     A.A. Ergin, “Görünmezlik Teknolojileri: Radar Kesti Alanı Nedir?,” Savunma ve Havacılık, vol. 21/120, no: 2007/02, pp: 173-177, (IDEF’07 Special Issue), 2007.