RCSSIG™

Overview

RCSSIG™ (Radar cross section analysis of 3-D objects using physical optics method) is the prediction/simulation of high frequency EM (Electromagnetic) scattering code based on physical optics and physical theory of diffraction method of complex 3-D targets.

Applications

• The principal use of RCSSIG is RCS (Radar Cross Section) prediction from various vehicles such as aircraft, land vehicles, and ships in various configurations.
• RCSSIG handles multi-bounce interaction and blockage evaluation using ray optics with efficient beam tracing. Edge effects are optionally computed with the physical theory of diffraction, providing a first order correction to the physical optics results.
• RCSSIG automatically finds diffracting edges by sorting through all edges shared by facets. Self shadowing is also included to eliminate artificial returns from non-illuminated sides of the target.
• Materials are included through the use of Fresnel reflection coefficients.

Benefits

• RCSSIG predicts radar signature based on physical optics and physical theory of diffraction at microwave and high frequencies. RCSSIG generates an ISAR image of known downrange/cross-range resolution to isolate multi-path contributions.
• RCSSIG has the option to run discrete and stepped frequencies. Run time is dramatically decreased for multiple frequencies calculations because they are in the innermost loop of the codes.
• In large complex models, run time may be reduced by switching off a shadowed/blocked components RCS calculation.

Product Features

• Physical Optics w/ PTD (Physical Theory of Diffraction)
• Near field computation (curved wavefront)
• Selective RAM treatment from materials database; each model component may be independently treated
• Switchable edge diffraction w/ auto edge detection
• Infinite groundplane interaction
• Blocking: tailored blocking matrix allows selective blocking
• Multi-path: tailored interaction matrix allows selective interaction
• Isolated output (by component, single-bounce, multi-bounce)
• Discrete frequency and stepped frequency options
• RCS by component for isolation
• Inverse Synthetic Aperture Radar (ISAR) Generation
• Accepts stepped frequency data as input
• Generates ISAR image of known downrange/cross-range resolution to isolate multi-path contributions
• Used to identify scattering centers
• Run-time reduction
• Multiple frequency calculations are in the innermost loops of the codes, so that the ray tracing calculations are made only once for a given aspect angle
• Geometry components may be included to provide shadowing/blocking while switching off their RCS calculation
• Principal Polarization Computations
• Co-polarized fields: HH and VV
• Cross-polarized fields: HV and VH