Assessment of the RISAT-1 FRS-2 mode for oil spill observation

2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) Pub Date : 2017-12-04 DOI:10.1109/IGARSS.2017.8127129

S. Skrunes, C. Brekke, M. M. Espeseth

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引用次数: 9

Abstract

Synthetic aperture radar data acquired by the Radar Imaging Satellite (RISAT-1) over experimental oil spills is here investigated. One quad-polarization scene in the Fine Resolution Alternate Polarization Stripmap (FRS-2) mode is analyzed to evaluate the potential of using this mode for oil spill observation. Oil slicks of varying type and age are clearly detected in the HH and VV channels, with relatively high signal-to-noise ratios. The cross-polarization channel is not found useful due to its proximity to the noise floor and some processing issues in the received product. Only intensity-based multipolarization parameters can be extracted due to the incoherent data acquisition. The Total Copolarization Power and the Polarization Difference are found to have good detection capabilities, whereas the Copolarization Power Ratio and the Normalized Polarization Difference only show small indications of the slicks. Comparison between SAR data and coincident observations from aircraft show a correlation between enhanced SAR signatures and locations of thicker oil layers.

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RISAT-1 FRS-2模式对溢油观测的评估

本文研究了由雷达成像卫星(RISAT-1)在实验溢油上获得的合成孔径雷达数据。分析了FRS-2模式下的一个四极化场景，评价了该模式在溢油观测中的应用潜力。在HH和VV通道中可以清楚地检测到不同类型和年龄的浮油，具有相对较高的信噪比。由于交叉极化通道靠近噪声底和接收产品中的一些处理问题，因此发现它没有用处。由于数据采集的不相干性，只能提取基于强度的多极化参数。总共偏光功率和偏振差具有较好的检测能力，而共偏光功率比和归一化偏振差仅能显示少量的光斑迹象。将SAR数据与飞机观测数据进行比较，发现增强的SAR特征与较厚油层的位置之间存在相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

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