Airborne Laser Altimetry of the Thwaites Glacier Catchment, West Antarctica

This data set includes airborne altimetry collected over the catchment and main trunk of Thwaites Glacier, one of Antarctica's most active ice streams. The airborne altimetry comprises 35,000 line-kilometers sampled at 20 meters along track. The full dataset has an internal error of ±20 cm; a primary subset has an error of ±8 cm. We find a +20 cm bias with Geoscience Laser Altimeter System data over a flat interior region. These data will serve as an additional temporal reference for the evolution of Thwaites Glacier surface, as well as aid the construction of future high resolution Digital Elevation Models (DEM). Line data are available in space-delimited ASCII format and are available via FTP.

本数据集包含在南极洲最活跃的冰流之一——思韦茨冰川（Thwaites Glacier）的流域及主干区域采集的机载测高数据。该机载测高数据涵盖35000线公里，沿航迹方向的采样间隔为20米。完整数据集的内部误差为±20厘米；核心子集的误差为±8厘米。在平坦的内陆区域，我们发现其与地球科学激光测高系统（Geoscience Laser Altimeter System）数据存在+20厘米的偏差。这些数据将作为思韦茨冰川表面演化的补充时间参考，同时助力未来高分辨率数字高程模型（Digital Elevation Models，DEM）的构建。航线数据以空格分隔的ASCII格式提供，可通过FTP获取。