AN ANALYTICAL STUDY OF RADAR RETURNS IN THE PRESENCE OF A ROUGH SEA SURFACE

The analytical study described in this report was originally undertaken in an attempt at a theoretical explanation of certain experimental results on radar return from ship targets corrupted by sea return. The analysis, like a number of previous treatments of this problem, is based on the classical perturbation approach credited to S. O. Rice. It assumes small fluctuations ('capillary waves') superposed on a large-scale 'sea swell.' Certain cross-correlation functions of the radar return are calculated. The radar-target system geometry is modeled, allowing for consideration of various antenna beam patterns, pulse shapes, sea-swell geometries and discrete targets on or near the sea surface. Terms beyond first order (second and third) are included in order to explain cross-polarization effects, which have been observed experimentally. Limited results on fourth-order terms are also obtained. However, when the analysis is carried only to fourth order and these terms are averaged, they do not contribute to the cross-polarization and their effect is seen only if specular returns are present.

  • Corporate Authors:

    Naval Research Laboratory

    4555 Overlook Avenue, SW
    Washington, DC  USA  20375-5320
  • Authors:
    • Raemer, H R
  • Publication Date: 1980-3-12

Media Info

  • Pagination: 97 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00318606
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NRL-8369 Intrm Rpt., AD-E000-437
  • Files: TRIS
  • Created Date: Oct 27 1980 12:00AM