Ocean Wave Imaging by SAR (Synthetic Aperture Radars),

Abstract

SAR imagery of the sea surface contains wave-like features. The direct imaging problem is to describe the image of a given sea surface. Four approaches are given here. These are linear imaging, Fourier series, functional expansion and asymptotic methods. Of particular interest is the loss of wave modulations due to nonlinear velocity bunching. The image power spectrum is analysed using functional expansions and the azimuthal banding is explained by stochastic nonlinear velocity bunching. The theoretical results agree closely with SEASAT data and some examples are given. The inverse sea imaging problem is to describe the sea surface corresponding to a given image. Some preliminary results using linear inversion techniques are given. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1983
Accession Number
ADP002723

Entities

People

  • S. Rotheram

Tags

DTIC Thesaurus Topics

  • Fourier Series
  • Inversion
  • Modulation
  • Ocean Waves
  • Power Spectra
  • Radar
  • Radio Waves
  • Remote Sensing
  • Spectra
  • Synthetic Aperture Radar
  • Waves

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computer Vision.
  • Radar Systems Engineering.