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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Single and Multipolarimetric P-Band SAR Tomography of Subsurface Ice Structure
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Single and Multipolarimetric P-Band SAR Tomography of Subsurface Ice Structure

机译：地下冰结构的单极化和多极化P波段SAR层析成像

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摘要

In this paper, first results concerning the characterization of the subsurface of ice sheets and glaciers through single and multipolarization synthetic aperture radar (SAR) tomography (TomoSAR) are illustrated. To this aim, the processing of data acquired in the framework of the European Space Agency IceSAR 2012 campaign is discussed. IceSAR 2012 was conceived so as to support the secondary objectives of the future Earth Explorer mission BIOMASS, which will be a SAR instrument with media penetration capabilities due to the use of the P-band frequency. In this regard, a tomographic study of ice was motivated by the fact that cryospheric remote sensing is of fundamental importance in order to understand more in depth the morphology and the dynamic processes regulating ice sheets. The main objective of the tomographic experiment of the campaign herein discussed was indeed to assess the capability of P-band SAR to retrieve any information about ice subsurface structure. Imaging has been achieved through TomoSAR techniques, applied to airborne multibaseline data acquired in the southwest of Greenland. Different imaging approaches are compared, and the main results achieved are presented: It is found that scattering in the upper layers of glacial subsurface can be achieved up to an extent of about 20–60 m, conditional on the different types of glaciological zone observed. Moreover, clear morphological structures have been found beneath the ice surface at one of the investigated sites.
机译：在本文中，有关通过单极化和多极化合成孔径雷达（SAR）层析成像（TomoSAR）表征冰盖和冰川地下特征的第一个结果得到了说明。为此，讨论了在欧洲航天局IceSAR 2012活动框架内获取的数据的处理。 IceSAR 2012的构想是为了支持未来的地球探索者任务BIOMASS的次要目标，BIOMASS将由于使用P频段频率而成为具有媒体渗透能力的SAR仪器。在这方面，冰层层析成像的研究是出于以下事实：冰冻圈遥感具有根本重要性，以便更深入地了解调节冰盖的形态和动态过程。实际上，本文讨论的运动的断层摄影实验的主要目的实际上是评估P波段SAR检索有关冰表层以下结构的任何信息的能力。成像已通过TomoSAR技术实现，该技术已应用于格陵兰西南部获取的机载多基线数据。比较了不同的成像方法，并介绍了取得的主要结果：发现，根据观察到的不同类型的冰川带，可以在大约20-60 m的范围内实现冰川地下上层的散射。此外，在被调查的地点之一的冰面下发现了清晰的形态结构。

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