Focused synthetic aperture radar processing of ice-sounder data collected over the Greenland ice sheet
Focused synthetic aperture radar processing of ice-sounder data collected over the Greenland ice sheet
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DOI：
10.1109/36.957274
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发表时间：
2001-10
期刊：
影响因子：
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通讯作者：
J. Legarsky;S. Gogineni;T. Akins
中科院分区：
文献类型：
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作者：
J. Legarsky;S. Gogineni;T. Akins
提出了一种适用于机载/星载测冰雷达系统的合成孔径雷达(SAR)处理算法，并将其应用于格陵兰岛采集的数据。通过使用聚焦SAR(相位校正相干平均)，他们将沿航迹的分辨率提高了4倍，并且基于对格陵兰冰层探测数据集的点目标分析，提供了比非聚焦SAR(无相位校正的相干平均)6分贝的处理增益。此外，他们还证明了聚焦SAR处理减少了杂波，并使他们能够识别隐藏在杂波中的基岩界面回波。使用聚焦合成孔径雷达技术，他们处理了在格陵兰岛西南部2000米等高线的一段360公里长的关键部分收集的数据。据他们所知，这是第一次在这个关键位置进行高质量的雷达冰层厚度测量。此外，这些冰层厚度的测量已经被用于改善格陵兰冰盖的质量平衡估计。
The authors developed a synthetic aperture radar (SAR) processing algorithm for airborne/spaceborne ice-sounding radar systems and applied it to data collected in Greenland. By using focused SAR (phase-corrected coherent averaging), they improved along-track resolution by a factor of four and provided a 6-dB processing gain over unfocused SAR (coherent averaging without phase correction) based on a point-target analysis for a Greenland ice-sounding data set. Also, They demonstrated that the focused-SAR processing reduced clutter and enabled them to identify bedrock-interface returns buried in clutter. Using focused-SAR technique, they processed data collected over a key 360-km-long portion of the 2000-m contour line of southwest Greenland. To the best of their knowledge, these are the first high-quality radar ice thickness measurements over this key location. Moreover, these ice-thickness measurements have been used for improving mass-balance estimates of the Greenland ice sheet.