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首页> 外文会议>Geoscience and Remote Sensing Symposium, 2002. IGARSS '02. 2002 IEEE International >Radar measurements of ice sheet thickness of outlet glaciers in Greenland
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Radar measurements of ice sheet thickness of outlet glaciers in Greenland

机译：格陵兰岛出口冰川冰盖厚度的雷达测量

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We have conducted airborne measurements over the Greenland ice sheet from the NASA P-3B aircraft using a 150-MHz coherent radar depth sounder to obtain extensive ice sheet thickness measurements. Simultaneous measurements of ice sheet elevation were also made using a laser altimeter. In outlet glacier areas along the ice sheet margin, the ice surface is characterized by a very rough, crevassed surface near the calving front. The rough ice surface generates signal clutter, which can mask the bottom echo. We are developing a technique to remove the surface clutter component from the signal to reveal the bottom echo, providing a complete ice thickness survey to the calving front of outlet glaciers. This technique makes use of a dense array of ice surface elevation measurements provided by the laser altimeter to characterize surface roughness. Surface roughness parameters are then used in a backscatter model to characterize the clutter waveform, which can be subsequently removed from the radar signal.
机译：我们使用150 MHz相干雷达测深仪对NASA P-3B飞机在格陵兰冰原上进行了机载测量，以获取广泛的冰原厚度测量结果。还使用激光高度计同时测量了冰盖高度。在沿冰原边缘的出口冰川区域，冰面的特征是靠近产犊前缘的表面非常粗糙，呈皱纹。粗糙的冰面会产生信号杂波，从而可能掩盖底部回波。我们正在开发一项技术，以消除信号中的表面杂波成分，以揭示底部回波，从而对出流冰川的弯曲前部提供完整的冰层厚度调查。该技术利用由激光高度计提供的密集的冰表面高程测量来表征表面粗糙度。然后在反向散射模型中使用表面粗糙度参数来表征杂波波形，然后可以将其从雷达信号中去除。

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