作者
WenKang Liu, MengDao Xing, Guang-Cai Sun
发表日期
2019/7/28
研讨会论文
IGARSS 2019-2019 IEEE International Geoscience and Remote Sensing Symposium
页码范围
763-766
出版商
IEEE
简介
Ship oscillatory motions with long coherence processing interval (CPI) are complex and hard to accurately estimate. The traditional ship imaging methods usually avoid long-CPI focusing by dealing with a short observation time interval, which may make it hard to obtain a high-resolution and high-SNR image. In this paper, the mechanisms and challenges of long CPI imaging of oscillatory targets are investigated. The properties of wavenumber domain support (WDS) and point spreading function (PSF) of oscillatory targets are analyzed. It's found that the WDS spreads as a three-dimensional (3D) thin and curved sweep surface, with time-variant energy density, non-parallel boundaries and a complex structure. The PSF of an oscillatory target has a 3D resolution, but also multiple side-lobes with high level. We inspect the relationships between the properties of the WDS and the non-ideal PSF. Moreover, it's found that …
引用总数
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WK Liu, MD Xing, GC Sun - IGARSS 2019-2019 IEEE International Geoscience …, 2019