pRediCS: A new GO-PO--based ray launching simulator for the calculation of electromagnetic scattering and RCS from electrically large and complex structures

Abstract

Abstract:In this paper, we present a new simulator called pRediCS for the calculation of electromagnetic scattering and radar cross-section (RCS) from electrically large and complex targets. The simulator utilizes the geometric optics (GO) theory and launching of electromagnetic rays for tracing and calculating the electric field values as the electromagnetic waves bounce around the target. The physical optics (PO) theory is also exploited to calculate the final scattered electric field by calculating the far-field PO integration along the observation direction. The simulator is first tested with known objects of canonical shapes, whose analytical solutions are available in the literature. Next, our implemented GO-POtype algorithm is validated by simulating the benchmark targets that have been well studied and documented by various studies. Finally, the RCS computation from complex and electrically large objects is calculated. By utilizing the RCS values for different frequencies and aspects, a successful inverse synthetic aperture radar image of the target with fast simulation time is achieved.

Interpretation and Analysis of Target Scattering From Fully-Polarized ISAR Images Using Pauli Decomposition Scheme for Target Recognition

“…All the electromagnetic scattering simulation experiments have been carried out by our recently developed highfrequency physical electromagnetic simulator tool called PREDICS [27][28][29]. PREDICS is based on SBR technique [33][34] that utilized ray launching with geometric optics (GO) theory and the application of the physical optics (PO) theory together with the physical theory of diffraction (PTD).…”

“…PREDICS is based on SBR technique [33][34] that utilized ray launching with geometric optics (GO) theory and the application of the physical optics (PO) theory together with the physical theory of diffraction (PTD). The detailed theoretical derivation behind PREDICS and its accuracy validation studies in predicting the electromagnetic scattering and/or radar RCS from benchmark targets can be reached from [27], [28] and [29] and will not be repeated here. PREDICS can compute fully-polarimetric electromagnetic backscattering from electrically large and complex objects with high accuracy which is followed with generation of RCS and ISAR imagery.…”

“…work has dealt with the scattering behavior of more realistic targets. An assessment of the utility of Pol-ISAR in improving recognition of complex targets, can also be made by means of simulation studies [27][28][29][30]. This could serve as a groundtruth validation of the relevant techniques, mainly the ones related to target decompositions.…”

“…Toward this direction, this paper makes use of the simulated Pol-ISAR imagery to characterize the backscattering signatures of a SLICY (Sandia Laboratory Implementation of Cylinders) object and a stationary ground vehicle, i.e., a backhoe loader. Simulation studies have been carried out with our recently developed high-frequency RCS simulator tool, called PREDICS [27][28][29] that is based on shooting and bouncing ray (SBR) technique [33][34] and capable of gathering full linear polarization (LP) data. An analysis of the real experimental data of a T-72 tank resulted from turntablebased ISAR measurements has also been made to evaluate the validity of the electromagnetic code.…”

Radar cross section analysis of unmanned aerial vehicles using predics

“…PREDICS is a fast and effective simulation tool for the fast and accurate calculation of RCS from electrically large and complex-shaped platforms at high frequencies. The detailed information about PREDICS tool; including the theory behind the code and other technical features can be reached at (Özdemir et al, 2014a;Özdemir et al, 2014b;Kırık et al, 2019). The main graphical user interface (GUI) screen of PREDICS for the simulation of Mil-UAV is viewed in Fig.…”