Accession Number : ADP002727

Title :   A Review of Propagation and Scattering Factors in Remote-Sensing and Ship-Tracking by HF (High Frequency) Radar,

Corporate Author : BIRMINGHAM UNIV (ENGLAND) DEPT OF ELECTRONIC AND ELECTRICAL ENGINEERING

Personal Author(s) : Shearman,E. D. R.

Report Date : AUG 1983

Pagination or Media Count : 13

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)

Descriptors :   *Radar tracking, *Surface targets, *Doppler radar, *Remote detectors, *Electromagnetic scattering, Ships, Ground waves(Electromagnetic), Coastal regions, Ionosphere, Sea states, Test and evaluation, Real time, High frequency, Patterns, Detection, Scattering, Layers, Propagation, Doppler systems, Installation, Radar

Distribution Statement : APPROVED FOR PUBLIC RELEASE