Single-Look Complex COSMO-SkyMed SAR Data to Observe Metallic Targets at Sea
Single-Look Complex COSMO-SkyMed SAR Data to Observe Metallic Targets at Sea
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DOI：
10.1109/jstars.2012.2184271
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发表时间：
2012-06-01
影响因子：
5.5
通讯作者：
Paes, Rafael L.
中科院分区：
文献类型：
--
作者：
Migliaccio, Maurizio;Nunziata, Ferdinando;Paes, Rafael L.
本文首次将一种充分利用斑点噪声作为信息源的物理方法应用于X波段全分辨率单视复斜面(SCS)COSMO-SkyMed合成孔径雷达(SAR)数据的海上金属目标观测。提出了一种基于相干/非相干场比的恒虚警率(CFAR)滤波器，其特点是：1)在处理时间方面非常有效；2)能够提供具有很低虚警率的逻辑真假输出；3)可以在较宽的入射角范围内工作。通过对SCS X波段全分辨率COSMO-SkyMed合成孔径雷达数据的处理，实验结果表明了该方法的有效性。该数据集的一部分涉及与2009年6月1日发生在巴西海岸附近的法航447航班事故有关的具有挑战性的运营案件。它展示了Cosmo-SkyMed合成孔径雷达数据如何帮助在海上搜索飞机残骸。此外，即使考虑到Cosmo-SkyMed星座的高重访时间，所提出的方法仍具有很强的应用意义。
In this paper, a physically based approach, which takes full benefits of speckle noise as source of information, is first applied over X-band full-resolution single-look complex slant (SCS) COSMO-SkyMed synthetic aperture radar (SAR) data to observe metallic targets at sea. A constant false alarm rate (CFAR) filter based on the coherent-to-incoherent field ratio is developed, which: 1) is very effective in terms of processing time, 2) is able to provide logical true-and-false outputs characterized by a very low false alarm rate; and 3) can operate in a wide range of incidence angles. Experimental results, obtained by processing a wide data set of full-resolution SCS X-band COSMO-SkyMed SAR data, show the effectiveness of the proposed approach. Part of this data set regards the challenging operational case related to the Air France Flight 447 accident occurred on June 1, 2009, off the Brazilian coasts. It is shown how COSMO-SkyMed SAR data can assist the search of aircraft debris at sea. Moreover, the proposed approach is of great applicative relevance even because of the high revisit time of COSMO-SkyMed constellation.