Characterisation of High Grazing Angle X-band Sea-clutter Doppler Spectra

Abstract

Collection of radar sea-clutter for research purposes is typically performed from a clifftop looking out to sea as it is relatively simple and inexpensive. This constrains the radar look direction with respect to the wind and limits the grazing angle. To improve our understanding at high grazing angles in the range 15 deg to 45 deg, the DSTO's Ingara airborne X-band fully polarimetric radar has been used to collect 12 days worth of sea-clutter data. It has previously been shown that Walker's mean Doppler spectrum model is not suitable at these grazing angles and hence a new two component model is proposed which captures both the "slow" Bragg component and the "fast" non-Bragg component of the radar backscatter. A temporal decorrelation model is then presented which can be used to provide realistic performance prediction modelling.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2013
Accession Number
ADA591997

Entities

People

  • Luke Rosenberg

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Backscattering
  • Bandwidth
  • Data Sets
  • Detection
  • Doppler Effect
  • Electromagnetic Scattering
  • Geometry
  • National Security
  • Navigation
  • Radar
  • Remote Sensing
  • Scattering
  • Sea Clutter
  • Spread Spectrum
  • Synthetic Aperture Radar
  • Water Waves

Fields of Study

  • Environmental science

Readers

  • Radar Systems Engineering.
  • Systems Analysis and Design