Ship motions during long coherent processing interval (CPI) have six degrees of freedom,
and the oscillatory motions are roughly periodical. The traditional ship imaging methods …

Synthetic aperture radar (SAR) is important for marine surveillance. The image resolution of
SAR is obtained via coherent integration. However, with increasing coherent processing …

Synthetic aperture radar (SAR) is an essential tool for maritime surveillance in all weather
conditions and at night. Ships are often affected by sea breezes and waves, generating a …

Ship targets are high-value military and civilian targets with broad application prospects.
However, the precise focusing of ships is still a difficult issue because of their complicated …

Moving ship refocusing is challenging because the target motion parameters are unknown.
Moreover, moving ships in squint synthetic aperture radar (SAR) images obtained by the …

Rotating ships usually suffer from complicated defocusing in high-resolution spaceborne
synthetic aperture radar (SAR) imagery due to the nonuniform motions, which severely …

Under high sea state, ship targets make complex maneuvering motions due to strong
disturbances such as sea waves and sea winds. Selecting the optimal imaging time interval …

Due to the influence of waves, the fluctuations of each part of the ship are heterogeneous,
which makes the motion error is two-dimensional space-variant and the phase error is hard …

Geosynchronous synthetic aperture radar (GEO SAR) system has the ability of observing
targets for several hours in a large field of view. Complex and irregular rotating motion of the …

Imaging distortions induced by each particular rotation of a moving ship are quantitatively
investigated through numerical simulations. Two sets of dynamics are considered in the …