Techniques for Studying Sea Ice Drift and Deformation at Sites Far from Land Using LANDSAT Imagery,

Abstract

A semi-automatic procedure for transferring the location coordinates of a common set of ice features from the Earth coordinate system of one LANDSAT image to another is discussed. Errors in the transferral technique are examined using imagery over land and are found to be dominated by deviations (as large as 8 km) in the actual position of the center of the image from its stated position. A least squares strain program which utilizes polar coordinates to eliminate spurious effects that may occur if the coordinate system of a given floe is used as the common coordinate system, is discussed. Errors in coordinate system rotation, center location, distortions and nonlinearities in the images caused errors in vorticity of the order of 0.5% and in strain of the order of 0.1% per day. Both these errors are less than typical sea ice vorticity and strain rate. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1975
Accession Number
ADA041579

Entities

People

  • W. B. Tucker
  • W. D. Hibler Iii
  • Wilford Frank Weeks

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Artificial Satellites
  • Beaufort Sea
  • Cartesian Coordinates
  • Coordinate Systems
  • Data Acquisition
  • Ice
  • Latitude
  • Longitude
  • Measurement
  • North America
  • Paper
  • Regions
  • Satellite Imaging
  • Sea Ice
  • Strain Rate
  • Stratified Fluids

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Geodesy
  • Polar and Arctic Studies