KaRIn on SWOT: Characteristics of Near-Nadir Ka-Band Interferometric SAR Imagery
Geoscience and Remote Sensing, IEEE Transactions(2014)
摘要
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.
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关键词
backscatter,hydrological techniques,oceanographic techniques,radar imaging,radar interferometry,radiometry,remote sensing by radar,spaceborne radar,synthetic aperture radar,KaRIn,NASA-CNES wide-swath altimetry mission,SAR system,SWOT,Surface Water and Ocean Topography,bistatic synthetic aperture radar system,interferometric airborne SAR acquisition,interferometric coherence,natural surfaces,near-field backscattering measurement,near-nadir Ka-band interferometric SAR imagery,near-nadir swath,observation geometry,satellite track,water-land radiometric contrast,Altimetry,hydrology,interferometry,millimeter wave radar,oceanography,synthetic aperture radar
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