Radio echo sounding of polar ice sheets provides important information on the ice bed topography and internal layers. These data have been used by scientists to create 3-D maps of polar ice sheets for climate modeling as well as to reconstruct the climate history that dates back to hundreds of thousands of years. In this article, we present the design and development of three surface-based multichannel radars in the VHF and UHF bands. We provide results from radar data multifrequency and polarization radar data collected over the Greenland ice sheet. All the three radars shared the same digital waveform generator and digitizer, and were installed in and operated on a tracked vehicle. The radars are operated with three different antenna arrays designed for operation over 170–230, 180–340, and 600–900 MHz. The results we obtained sounded more than 2.7 km thick ice with radars operating at frequencies as high as 850 MHz with more than 40 dB signal-to-noise ratio.

中文翻译：

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冰盖多角度、频率和极化雷达测量

极地冰盖的无线电回波探测提供了有关冰床地形和内层的重要信息。这些数据已被科学家用来创建极地冰盖的 3D 地图以进行气候建模，以及重建可追溯到数十万年的气候历史。在本文中，我们介绍了 VHF 和 UHF 频段中三种地基多通道雷达的设计和开发。我们提供了在格陵兰冰盖上收集的多频和极化雷达数据的结果。所有三个雷达共享相同的数字波形发生器和数字化仪，并安装在履带车辆上并在其上运行。雷达采用三种不同的天线阵列，设计用于在 170-230、180-340 和 600-900 MHz 上运行。我们获得的结果听起来超过 2。