T hree-dimensional (3-D) MAT-LAB-based codes are developed for radar cross-section (RCS) modeling and simulation (MODSIM) using method of moments (MoM) and finite-difference time-domain (FDTD) approaches. Any object can realistically and comparatively be investigated.Electrical engineering education and training necessities electromagnetic (EM) MODSIM approaches [1]-[3]. Modeling and simulation has long been discussed in this magazine both as feature articles and as tutorials in this column. Multipurpose two-dimensional (2-D) FDTD-based education/training tools have been developed and shared with the reader [4], [5]. A series of articles [6]-[8] discussed RCS modeling and simulation and presented 3-D FDTD-based RCS packages. Finally, MATLAB-based 2-D FDTD codes were introduced to the use of the reader who is interested in EM MODSIM.This brief tutorial aims to revisit RCS modeling and simulation using two wellknown approaches, FDTD and MoM, and introduces novel simple MAT-LAB-based 3-D codes (RCS_MoM.m, RCS_FDTD.m), which can be freely downloaded from http://leventsevgi.net/ index.php?page=testingourselves. The Problem STaTemenTThe classical RCS modeling and simulation scenario is shown in Figure 1. Here, a target is located at the origin of the Cartesian coordinate system and illuminated by a plane wave. The plane wave may be a continuous waveCW) or a short pulse in time. A CW (narrow-band) illumination makes a frequency-domain method applicable. Short-pulse illumination necessitates time-domain transient analysis plus Fourier transformation. The plane The tutorial in this issue belongs to radar cross-section (RCS) modeling of realistic targets using three-dimensional method of moments (MoM) and finite-difference, time-domain (FDTD) approaches. Ahmet Sefer and Mehmet Alper Uslu have prepared MATLAB-based MoM and FDTD codes, respectively, for this purpose. As you might remember, we have recently shared MATLABbased FDTD codes together with the two tutorials published here [1], [2]. Those tutorials have been on the magazine's most downloaded list since then. Lecturers, researchers, and graduate students may easily modify/adapt these codes and use for their research. As we discussed in [3], numerical electromagnetics has become essential in teaching electromagnetic in the 21st century. Good news for the readers who are interested in electromagnetic modeling and simulation: both codes (RCS_MoM.m and RCS_FDTD.m) can be downloaded from my personal web page (http://leventsevgi.net/index.php?page=testingourselves) or can be obtained from the authors upon request. References[1] G. Toroglu and L. Sevgi, "Finite difference time domain (FDTD) MATLAB codes for the first and second order EM differential equations, "

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