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KaRIn on SWOT: Characteristics of Near-Nadir Ka-Band Interferometric SAR Imagery

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11 Author(s)
Fjortoft, R. ; Centre Nat. d'Etudes Spatiales, Toulouse, France ; Gaudin, J.-M. ; Pourthie, N. ; Lalaurie, J.-C.
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The principal instrument of the NASA/CNES wide-swath altimetry mission Surface Water and Ocean Topography (SWOT) is the Ka-band Radar Interferometer (KaRIn), a bistatic synthetic aperture radar (SAR) system operating on near-nadir swaths on both sides of the satellite track. There are limited reports on backscattering from natural surfaces at this short wavelength and particular observation geometry. Near-field backscattering measurements on water, as well as the first interferometric airborne SAR acquisitions at Ka-band covering the 0.6 °-3.9 ° incidence range of KaRIn, were therefore conducted. The experimental results confirm expected characteristics of near-nadir Ka-band interferometric SAR imagery, such as strong water/land radiometric contrast (typically in the order of 10 dB) and very high interferometric coherence on water.

Published in:

Geoscience and Remote Sensing, IEEE Transactions on  (Volume:52 ,  Issue: 4 )

Date of Publication:

April 2014

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