期刊
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
卷 8, 期 11, 页码 5052-5067出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTARS.2015.2438898
关键词
Along-track interferometry (ATI); constant false alarm rate (CFAR) detector; digital balancing (DB); displaced phase center antenna (DPCA); extended DPCA (EDPCA); ground moving target indication (GMTI); monitoring; ship detection; spatially variant apodization (SVA); synthetic aperture radar (SAR); surveillance
类别
资金
- FPU Research Fellowship Program, Ministerio de Educacion [AP2009-4590]
- FI-AGAUR Research Fellowship Program, Generalitat de Catalunya [2010FI EM051757]
- Spanish Ministry of Science and Innovation (MICINN) [TEC2011-28201-C02-01, TIN2014-55413-C2-1-P]
This paper explores the ground moving target indication (GMTI) capabilities of the German Aerospace Center's state-of-the-art airborne (F-SAR) and spaceborne (TerraSAR-X) synthetic aperture radars (SARs) when operating over maritime scenarios. The performance of classical dual channel GMTI techniques, such as displaced phase center antenna (DPCA) and along-track interferometry (ATI), as well as the promising adaptive techniques, like extended DPCA (EDPCA) and imaging space-time adaptive processing (ISTAP) have been analyzed on the basis of experimental acquisitions with both sensors. The objective of the paper is to highlight the limitations and challenges to be considered when processing real, multichannel GMTI data from pioneering SAR sensors for maritime surveillance. Different calibration or channel balancing strategies, on the basis of the digital balancing (DB) method, are studied, considering their impact on SAR-GMTI performance. An adaptive SAR processor, accounting for target kinematics and based on a matched filter bank (MFB) approach, is integrated in the SAR-GMTI processing chain in order to retrieve refocused images of the moving vessels.
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