A Review of Propagation and Scattering Factors in Remote-Sensing and Ship-Tracking by HF (High Frequency) Radar,
Abstract
The propagation-loss, noise and scattering mechanisms involved in ground-wave radar for sea-state sensing and ship-tracking are first reviewed, taking as an example a coastal installation in the U.K. Techniques for extracting surface-current, surface-wind and directional sea-wave spectrum from first and second-order sea-echo are described, with reference to the influence of the antenna directivity and propagation factors. The special factors affecting ship-tracking in range, azimuth and Doppler are illustrated. The second part of the review concerns the use of sky-wave radar for sea-state sensing and for assessing the ionospheric layer configuration and propagation mode patterns. Sea-state sensing is shown to require real-time propagation assessment for effective frequency-management. Rapid sweep-frequency, sweep-azimuth and Doppler analysis are shown to be desirable. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1983
- Accession Number
- ADP002727
Entities
People
- E. D. R. Shearman
Organizations
- University of Birmingham