In this paper, we deal with the problem of modeling the backscattering from sea surface for low-grazing-angle and high-resolution radar systems. Based on the electromagnetic two-scale model, we analyzed both the amplitude and frequency modulations induced on the small-scale Bragg resonant waves by the large-scale surface tilt and advection due to the swell presence. Evidence of sea-clutter nonstationarity has been verified and the relationship between the variations of clutter spectral features, such as texture, Doppler centroid, and bandwidth, have been studied by processing real sea-clutter data recorded by the IPIX radar of McMaster University, Hamilton, ON, Canada. An autoregressive nonstationary process is proposed and validated to model the physical phenomenon.
|Autori:||GRECO M; BORDONI F.; GINI F.|
|Titolo:||X-band Sea Clutter Non-Stationarity: The Influence of Long Waves|
|Anno del prodotto:||2004|
|Digital Object Identifier (DOI):||10.1109/JOE.2004.828548|
|Appare nelle tipologie:||1.1 Articolo in rivista|