Wideband measurements of ice sheet attenuation and basal scattering
Wideband measurements of ice sheet attenuation and basal scattering
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DOI：
10.1109/lgrs.2004.842474
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发表时间：
2005-04
影响因子：
4.8
通讯作者：
J. Paden;C. Allen;S. Gogineni;K. Jezek;D. Dahl-Jensen;L. Larsen
中科院分区：
文献类型：
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作者：
J. Paden;C. Allen;S. Gogineni;K. Jezek;D. Dahl-Jensen;L. Larsen
我们正在开发一个多频多基地合成孔径雷达（SAR）确定极地冰盖的基础条件。为了获得设计和优化雷达性能的数据，我们进行了实地测量，在2003年的现场季节在北格陵兰冰芯项目营地（75.1 N和42.3 W）与网络分析仪为基础的系统。从测量，我们确定了冰盖复杂的传递函数的频率范围从110-500 MHz的系统传递函数的反卷积。在这个频率范围内，我们观察到增加8/spl plusmn/2.5 dB的总损失使用的对数尺度数据的线性回归。与冰盖的传递函数和冰消光模型，我们估计从基面回波损耗约为37分贝。这些测量结果广泛适用于解释雷达探测数据，这些数据广泛用于极地冰盖的冰川学研究。这些数据也被用于多频多基地合成孔径雷达系统的设计考虑的链路预算。
We are developing a multifrequency multistatic synthetic aperture radar (SAR) for determining polar ice sheet basal conditions. To obtain data for designing and optimizing radar performance, we performed field measurements with a network-analyzer-based system during the 2003 field season at the North Greenland Ice Core Project camp (75.1 N and 42.3 W). From the measurements, we determine the ice sheet complex transfer function over the frequency range from 110-500 MHz by deconvolving out the system transfer function. Over this frequency range, we observe an increase in total loss of 8/spl plusmn/2.5 dB using a linear regression to the log-scale data. With the ice sheet transfer function and an ice extinction model, we estimate the return loss from the basal surface to be approximately 37 dB. These measurements have broad applicability to interpreting radar-sounding data, which are widely used in glaciological studies of the polar ice sheets. These data have also been used in the link budget for the design considerations of the multifrequency multistatic SAR system.