Polarimetric Radar Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica

This dataset contains ground-based, co-polarized radar data collected using pulse-modulated 60 MHz and 179 MHz radar at 19 sites around a deep ice coring site near the Ross and Amundsen flow divide of West Antarctic Ice Sheet (WAIS Divide). At each site, the radar data were collected at 12 orientations of the radar polarization plane for three radar pulse widths: 250 nsec, 500 nsec, and 1000 nsec. Useful signals were received from depths roughly between 200 m and 2000 m. Ice flow velocities and strain configurations were measured at most of these radar survey sites, and these ice motion data are also provided at NSIDC (GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica).

本数据集包含地面基同极化雷达数据，由脉冲调制型60 MHz与179 MHz雷达采集，测点覆盖南极西部冰盖（West Antarctic Ice Sheet, WAIS）罗斯与阿蒙森流域分界带（WAIS Divide）附近的深层冰芯钻探点周边共19个观测点位。在每个测点，雷达数据均按照雷达极化平面的12种方位角，并结合三种雷达脉冲宽度（250纳秒、500纳秒、1000纳秒）完成采集。有效信号的采集深度大致介于200米至2000米之间。多数雷达观测测点均开展了冰流速度与应变结构的测量，相关冰运动数据亦发布于美国国家冰雪数据中心（National Snow and Ice Data Center, NSIDC），对应数据集为《GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica》。