J. Curlander

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The two-dimensional transfer functions of several synthetic aperture radar (SAR) focussing algorithms are derived considering the spaceborne SAR environments. The formulation includes the factors of the earth rotation and the antenna squint angles. The resultant transfer functions are explicitly expressed in terms of Doppler centroid frequency and Doppler(More)
A novel technique is presented to steer the antenna beam to the zero-Doppler line for a spacecraft platform which operates in a non-zero roll attitude. The purposes of employing this attitude steering technique are three folds: (a): Reduction of the Doppler centroid error caused by the variation in target elevation, which improves the signal-to-noise ratio(More)
Glaciers and ice sheets modulate global sea level by storing water deposited as snow on the surface and discharging water back into the ocean through melting and via icebergs. Only recently have we recognized, primarily from satellite observations, that the size of this frozen reservoir can change as demonstrated by the rapid thinning of Jacobshavn Glacier(More)
This paper describes the results of the first phase (1991) of a multi-year cooperative effort between Vexcel Corporation and the Center for the Study of Earth from Space at the University of Colorado in its SIR-C project. The effort consisted of the geometric ortho-rectification, and generation of 00 images of multiple incidence synthetic apemre radar(More)
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