Discontinuous Non-Rigid Motion Analysis of Sea Ice using C-Band Synthetic Aperture Radar Satellite Imagery

Abstract

Sea-ice motion consists of complex non-rigid motions involving continuous, piece-wise continuous and discrete particle motion. Techniques for estimating non-rigid motion of sea ice from pairs of satellite images (generally spaced three days apart) are still in the developmental stages. For interior Arctic and Antarctic pack ice, the continuum assumption begins to fail below the 5 km scale with evidence of discontinuities already revealed in models and remote sensing products in the form of abrupt changes in magnitude and direction of the differential velocity. Using a hierarchical multi-scale phase-correlation method and profiting from known limitations of cross correlation methods, we incorporate the identification of discontinuities into our motion estimation algorithm, thereby descending below the continuum threshold to examine the phenomenon of discontinuous non-rigid sea-ice motion.

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Document Details

Document Type
Technical Report
Publication Date
Jun 27, 2004
Accession Number
ADA435632

Entities

People

  • Cathleen Geiger
  • Chandra Kambhamettu
  • Mani Thomas

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Algorithms
  • Artificial Satellites
  • C Band
  • Computational Complexity
  • Correlation Techniques
  • Cross Correlation
  • Data Science
  • Data Sets
  • Detectors
  • Discontinuities
  • Frequency
  • Information Science
  • Particles
  • Satellite Imaging
  • Sea Ice
  • Statistical Algorithms
  • Synthetic Aperture Radar

Readers

  • Computer Vision.
  • Polar and Arctic Studies

Technology Areas

  • Space