Open AccessGeneral range model for multi‐channel SAR/GMTI with curvilinear flight trajectory
Author(s) -
Chen Zhanye,
Zhou Yu,
Zhang Linrang,
Wei Honghao,
Lin Chunhui,
Liu Nan,
Wan Jun
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.7263
Subject(s) - moving target indication , curvilinear coordinates , trajectory , range (aeronautics) , computer science , channel (broadcasting) , remote sensing , geodesy , geology , aerospace engineering , telecommunications , physics , radar , engineering , radar imaging , mathematics , continuous wave radar , geometry , astronomy
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 Thus, the traditional constant baseline range model is no longer valid since it will introduce severe phase error.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.