Dynamic RCS: A Geometrical/Eulerian Approach to Computing High Frequency Radar Cross Sections
Abstract
Level Set Systems (LSS) has developed a 3D-Eulerian, time-domain method for computing the propagation and scattering of short electromagnetic pulses over arbitrarily long distances. Efforts accommodated includes variation of index of refraction and scattering from complex features including tanks and aircraft. LSS developed a level set method for the construction of wavefronts that handles resolution, multivalued solutions, reflection and refraction. The key idea involves an Eulerian, fixed grid solver involving a system of linear Liouville equations, three equations in five space dimensions. The complexity of each update is no worse than that of ray tracing because of the use of a new local level set method for high dimension and codimension. This allows this level set method to be a viable alternative to ray tracing with many advantages for realistic DOD applications involving geometric optics. Flow Analysis Inc (FAI) has developed a lattice confinement method that has been shown to be effective for propagating short pulses as nonlinear solitary waves over long distances. These two methods complement each other and lay the foundation for greatly improved Radar Cross Section computations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2001
- Accession Number
- ADA418924
Entities
People
- John Steinhoff
- Stanley Osher