PLRAY - A Ray Propagation Loss Program.
Abstract
PLRAY is a ray propagation loss program similar in many respects to FACT. It computes propagation loss as a function of range at constant depth in a horizontally stratified ocean with a flat bottom. It does this by computing a family of rays and interpolating between them to obtain the intensities of the various multipath arrivals at the specified receiver locations. Like FACT, PLRAY provides the option of incoherent or semicoherent ray addition. It contains wave corrections for smooth caustics but not for cusped caustics. The cusped caustic errors are minimized by separating the source and receiver slightly in depth. It also contains a surface duct model which replaces ray computations for propagation in a surface duct. PLRAY incorporates two features not included in FACT; it permits the user to insert his own bottom loss curves in place of the internally contained curves and it makes provision for insertion of a beam pattern. Although occasionally significant differences in output are observed, PLRAY and FACT generally yield comparable resutls. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 26, 1978
- Accession Number
- ADA062019
Entities
People
- Charles. L. Bartberger
Organizations
- Naval Air Warfare Center Warminster