Sea ice lead dynamics from ERS-1 SARThe use of ERS-1 SAR (Synthetic Aperture Radar) images to measure ice lead changes and ice deformation, and thus to determine their relationships and compare them to theory, is reported. ERS-1 SAR data collected at the Alaska (U.S.) SAR facility are processed into low resolution geocoded images which are used as input to the Geophysical Processor System (GPS). The GPS uses cross correlation and edge detection on sequential pairs of images to track a regular 5 km array of grid points. The result for each sequential image pair is a field of ice displacement that contains, on average, more than 200 vectors. The GPS also classifies all the pixels of the images into one of four ice types based on the normalized backscatter coefficients and a seasonal look-up table. This allows all pixels to be labeled as either multiyear ice or as the first year ice and open water that comprise leads.
Stern, Harry L. (Washington Univ. Seattle., United States)
Rothrock, D. Andrew (Washington Univ. Seattle., United States)
Kwok, Ronald (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
August 16, 2013
January 1, 1994
Publication: ESA, Proceedings of the Second ERS-1 Symposium on Space at the Service of Our Environment, Volume 1