The ApRES (autonomous phase-sensitive radio-echo sounder) instrument is a robust, lightweight and relatively inexpensive radar that has been designed to allow long-term, unattended monitoring of ice-shelf and ice-sheet thinning. We describe the instrument and demonstrate its capabilities and limitations by presenting results from three trial campaigns conducted in different Antarctic settings. Two campaigns were ice sheet-based – Pine Island Glacier and Dome C – and one was conducted on the Ross Ice Shelf. The ice-shelf site demonstrates the ability of the instrument to collect a time series of basal melt rates; the two grounded ice applications show the potential to recover profiles of vertical strain rate and also demonstrate some of the limitations of the present system.
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机译：ApRES（自主相位敏感型无线电回波测深仪）仪器是一款坚固，轻巧且相对便宜的雷达，旨在对冰架和冰盖变薄进行长期无人值守的监控。我们通过介绍在不同南极环境中进行的三个试验活动的结果来描述该仪器并展示其功能和局限性。两项运动是基于冰原的– Pine Island Glacier和Dome C –一项是在Ross Ice Shelf上进行的。冰架站点证明了该仪器收集基础融化速率时间序列的能力。两种接地冰的应用显示了恢复垂直应变率分布的潜力，并且还证明了本系统的某些局限性。
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