Polar Science Center, Applied Physics Laboratory
University of Washingon, Seattle, Washington

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Notes about our work with RGPS data

RGPS: Radarsat Geophysical Processor System


RGPS at JPL (Jet Propulsion Laboratory) This is where the data are.
RGPS at ASF (Alaska SAR Facility)
RGPS at PSC (Harry's page)


These animations depict the deformation rate of each cell as a color coded dot. There is one frame per day. and the deformation of each cell is replicated for the days spanned by an observation. The positions are linearly interpolated. (If they don't open in your browser, download a file to disk and use xanim (unix or linux), Quicktime (Mac) or PowerFlic (Win) to view these .fli files. )

SHEBA winter, Nov '97 to May '98, Total Deformation rate (4.5 MB)
SHEBA Summer, May '98 to Aug '98, Total deformation rate (5.5 MB)
SHEBA year, just the ship region, Shear and Divergence (25.3 MB)
SHEBA year, Nov '97 to Aug '98, Vorticity (14.5 MB)
SHEBA year, Nov '97 to Aug '98, Shear and divergence (31.3 MB)
SHEBA year, Nov '97 to Aug '98, Cumulative Total Deformation (16.9 MB)

Derived data sets


We have made what we call "snapshot" data sets that include all of the deformation observations that bracket particular moments in time, once every 5 days. All of the 5-day snapshots, one ASCII file per day, for each of three years are included in three tar files. The Readme file gives most of the information needed for reading the data.

Fall 1996 to summer 1997 (44 MB, tar.Z file)
Fall 1997 to summer 1998 (82 MB, tar.Z file)
Fall 1998 to summer 1999 (70 MB, tar.Z file)


Papers by others This partial list was compiled by Ron Kwok.

Our papers

Marsan, D., H. Stern, R. Lindsay, and J. Weiss, 2004: Scale dependence and localization of the deformation of Arctic Sea Ice, Phys. Rev. Lett., 17, doi:10.1103/PhysRevLett93.178501. (pdf file)

Lindsay, R. W. and H. L. Stern, 2003: The RADARSAT Geophysical Processor System: Quality of Sea Ice Trajectory and Deformation Estimates. Journal of Oceanic and Atmospheric Technology, 20, 1333-1347. (pdf file)

Yu, Y and R. W. Lindsay, 2003: Comparisons of thin ice fractions estimated from RGPS and AVHRR. J. Geophys. Res., 108(C12), 3387, doi:10.1029/2002JC001319. (pdf file)

Lindsay, R. W., 2002 : Ice deformation near SHEBA, Journal of Geophysical Research, 107, 8042, doi:10.1029/2000JC000445. (pdf file)

Lindsay, R. W., 2001: Sea ice albedo derived from RGPS-based ice thickness estimates, Annals of Glaciology. (pdf file)