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Onyx is a parallel, low-frequency (exact or full wave) radar cross section (RCS) and signature prediction code that uses the three-dimensional Method of Moments (MoM). It is intended for treating objects of intermediate to large electrical size that asymptotic codes such as lucernhammer MT are ill-suited to handle.

Onyx can treat the same types of problems as Serenity, however instead of using the ACA and a direct LU factorization, Onyx uses an iterative solver accelerated using the Multilevel Fast Multipole Algorithm + SVD (MLFMA/SVD).

Feature Details

• Monostatic and Bistatic complex-valued scattered far field and RCS.

• Uses ACAD facet files, and uses RWG basis functions.

• Onyx uses a GMRES iterative solver, accelerated using the Multilevel Fast Multipole Algorithm + SVD (MLFMA/SVD). This yields superior memory savings versus a direct approach, or the ACA and MLACA used in Serenity.

• Incomplete LU (ILUT) and Sparse Approximate Inverse (SPAI) preconditioners are supported.

• Supports conducting (PEC) objects, as well as objects that are conducting, dielectric, or composite. Dielectrics may be lossy, and junctions between dielectric and conducting regions are fully supported.

• Supports the impedance boundary condition (IBC) as well as resistive cards (R-Cards).

• Supports multiple run-time geometry files, allowing the user to specify separately the pieces of a composite geometry or scene.

• Parallelized for shared-memory systems (SMP).

• Onyx is a console based application, and can be easily run inside scripts and batch jobs.