Electromagnetic Scattering from Simple Ship-Sea Models.
Abstract
Two models of calculating the interaction between a radar system and a ship at sea, both adapted to short range encounters, have been developed. The first utilizes a one dimensional composite surface to model the sea, and a flate plate to model the ship. Four major scattering mechanisms (Bragg scatter and specular scatter from the surface, reflection from the double bounce corner formed by plate and surface, and edge diffraction by the plate) were identified, and the contribution of each to the total signature calculated by physical optics and GTD techniques. The signatures were in good agreement with measurements made at the Encounter Simulation Laboratory of the Naval Weapons Center. The second model was a two dimensional flat patch representation for the ocean, and an elliptic cylinder for the ship. GTD methods for calculating the signature due to the double bounce corner in this model have been completed. The signatures show a marked dependence on the direction of the radar trajectory with respect to the axes of the elliptic cylinder. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1977
- Accession Number
- ADA081117
Entities
People
- John Huang
- William H. Peake
Organizations
- Ohio State University