Galaxy - Body of Revolution Method of Moments Simulation

Galaxy is an electromagnetic signature code that calculates the scattered field and radar cross section of rotationally symmetric, three-dimensional objects. It uses the Body of Revolution Method of Moments (MoM-BOR) technique originally developed by Harrington and Mautz. The advantage of the BOR formulation lies in its small matrix size, allowing the code to handle objects that are many electrical wavelengths in size. In fact, the BOR approach in Galaxy makes practical wide-bandwidth simulations of many realistic scattering shapes such as reentry vehicles and rocket bodies.

Galaxy implements the Electric Field Integral Equation (EFIE) and Magnetic Field Integral Equation (MFIE) for BOR surfaces. It handles open curves as well as closed curves that exist on or off the body symmetry axis.

Brief capability summary:

Conducting (PEC) objects

Electric and Magnetic field integral equations

Triangular rooftop basis functions

Full matrix LU decomposition solver

Fully parallelized execution over modes

Written completely in C

Binaries available for Windows, x86 linux and SGI IRIX/IRIX64

Reentry vehicles, such as the triconic with cavity show in a partial outline above, can be simulated over multiple frequencies to obtain wideband static patterns, incorporating all effects such as traveling and creeping waves, multiple diffractions, and delayed returns from cavities, illustrated below for this RV at C-Band.