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Dual-beam along-track interferometric synthetic aperture radar (ATI-SAR) is a promising technique for estimating high-resolution ocean surface currents [1, 2, 3] and other dynamic surface features [4]. By employing two receive antennas separated by a small distance along the flight direction, the ATI-SAR provides two observations of the surface scatterer from the same locations at slightly different...
Differences between surface velocity estimates from dual-beam along-track interferometric (ATI) synthetic aperture radar (SAR) and drift rate measurements by surface current drifters are presented for a tidally-driven river mouth. Using hydrodynamic and scattering models, we analyze the contributions from various sources in order to explain the observed differences. We find that the differences are...
Surface flow is estimated from a dual-beam along-track interferometric synthetic aperture radar at the mouth of a tidally-driven estuary. The measurements show strong variation in the surface flow around jetties and seem to be associated with bathymetry. The surface flow estimates compare well with in situ drifter measurements made around the same time.
A new robust phase calibration technique to estimate and correct the range-dependent phase differences between two receivers in an FMCW ATI SAR has been developed. Based on linear regression, this calibration scheme jointly estimates the phases for both SAR receivers and reproduces the range-dependent phase ripple seen in the ATI interfergrams. After applying the calibration results to the post-processing...
Techniques to estimate and correct range-dependent phase differences between receivers in an FMCW ATI SAR are studied. Both techniques reproduce the range-dependent phase ripple seem in the ATI interferograms.
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