Analysis of scatterer motion effects in Marsen X band SAR imagery

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Abstract
Synthetic aperture radar X band images collected over the North Sea during the 1979 MARSEN experiment show numerous apparent point scatterers imaged with a degraded resolution in the along‐track direction. The observed resolution of these features is consistent with a scatterer coherence time of the order of 10−2 s or a vertical acceleration of the order of 5 m/s2. Observations of the resolution as a function of the processor integration time tend to support the coherence time explanation. Similar coherence times have been measured for breaking waves by conventional high‐resolution radars, suggesting that the same phenomena may be responsible for the features observed on the synthetic aperture radar imagery.

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