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Mapping of sea ice and measurement of its drift using aircraft synthetic aperture radar imagesSide-looking radar images of Arctic sea ice were obtained as part of the Arctic Ice Dynamics Joint Experiment. Repetitive coverages of a test site in the Arctic were used to measure sea ice drift, employing single images and blocks of overlapping radar image strips; the images were used in conjunction with data from the aircraft inertial navigation and altimeter. Also, independently measured, accurate positions of a number of ground control points were available. Initial tests of the method were carried out with repeated coverages of a land area on the Alaska coast (Prudhoe). Absolute accuracies achieved were essentially limited by the accuracy of the inertial navigation data. Errors of drift measurements were found to be about + or - 2.5 km. Relative accuracy is higher; its limits are set by the radar image geometry and the definition of identical features in sequential images. The drift of adjacent ice features with respect to one another could be determined with errors of less than + or - 0.2 km.
Document ID
19790049956
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Leberl, F.
(Graz, Technische Universitaet Graz, Austria)
Bryan, M. L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Elachi, C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Farr, T.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Campbell, W.
(U.S. Geological Survey Tacoma, Wash., United States)
Date Acquired
August 9, 2013
Publication Date
April 20, 1979
Publication Information
Publication: Journal of Geophysical Research
Volume: 84
Subject Category
Oceanography
Accession Number
79A33969
Distribution Limits
Public
Copyright
Other

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