Ship dynamics for maritime ISAR imaging.

Doerry, Armin Walter

Sandia National Laboratories

关键词: Doppler Radar.;    Synthetic Aperture Radar.;    Motion;    Seas;    42 Engineering;   

DOI  :  10.2172/929523
RP-ID  :  SAND2008-1020
RP-ID  :  AC04-94AL85000
RP-ID  :  929523

美国|英语

来源: UNT Digital Library

【 摘 要 】

Demand is increasing for imaging ships at sea. Conventional SAR fails because the ships are usually in motion, both with a forward velocity, and other linear and angular motions that accompany sea travel. Because the target itself is moving, this becomes an Inverse- SAR, or ISAR problem. Developing useful ISAR techniques and algorithms is considerably aided by first understanding the nature and characteristics of ship motion. Consequently, a brief study of some principles of naval architecture sheds useful light on this problem. We attempt to do so here. Ship motions are analyzed for their impact on range-Doppler imaging using Inverse Synthetic Aperture Radar (ISAR). A framework for analysis is developed, and limitations of simple ISAR systems are discussed.