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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing. >From Glacier Facies to SAR Backscatter Zones via GPR
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From Glacier Facies to SAR Backscatter Zones via GPR

机译：通过GPR从冰川相到SAR反向散射区

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摘要

We present a comparison between data acquired with frequency-modulated ground-penetrating radar (GPR) and satellite synthetic aperture radar (SAR). Both radars are polarimetric and operate at a center frequency of 5.3 GHz. The field site is the polythermal glacier Kongsvegen, Svalbard. Along glacier GPR profiles cover the ablation area and the accumulation area, where the latter consists of superimposed ice (SI) and firn. The glacier facies are clearly identifiable on the GPR profiles, although we show that the copolarized response is better for distinguishing different ice zones, whereas the SI–firn boundary is most obvious in the cross-polarized response. A calibrated backscatter coefficient is calculated for the GPR data and compared with the SAR backscatter coefficient. The SAR zones are in very good agreement with the GPR-derived glacier facies. We show that, in the ablation area, the SAR response is dominated by backscatter from the previous summer surface. In the SI and firn areas, it is dominated by sources below the previous summer surface.
机译：我们提出了在使用调频探地雷达（GPR）和卫星合成孔径雷达（SAR）采集的数据之间的比较。两个雷达都是极化的，并且以5.3 GHz的中心频率运行。现场是斯瓦尔巴特群岛的多热冰川Kongsvegen。沿着冰川，GPR轮廓覆盖了消融区域和聚集区域，后者由叠加的冰（SI）和烧成组成。尽管我们表明同极化响应更好地区分了不同的冰区，但在GPR剖面上可以清晰地识别出冰川相，而在交叉极化响应中，SI边界则最为明显。计算出GPR数据的校准后向散射系数，并将其与SAR后向散射系数进行比较。 SAR区与GPR派生的冰川相非常吻合。我们显示，在消融区域中，SAR响应主要由前一个夏季表面的反向散射决定。在SI和燃煤地区，其来源主要是前一个夏季表层以下的水源。

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