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General range model for multi-channel SAR/GMTI with curvilinear flight trajectory

General range model for multi-channel SAR/GMTI with curvilinear flight trajectory

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The platform of multi-channel synthetic aperture radar/ground moving target indication (MC-SAR/GMTI) system may encounter the problem of curvilinear trajectory due to the existence of acceleration in several applications, e.g. manoeuvring responding, orbital motion, and long-time observing. The curvilinear trajectory changes the attitude of the array, which leads to instantaneous baseline changing during echo reception. Thus, the traditional constant baseline range model is no longer valid since it will introduce severe phase error. In this Letter, a general range model that it applies to both stationary and moving targets for MC-SAR/GMTI is proposed. Simulation results of the point spread functions demonstrate that the proposed model can achieve good performance.

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.7263
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