While numerous maps of Greenland ice flow velocity exist, most have gaps in coverage and/or accuracy is limited. We processed a large volume of synthetic aperture radar and Landsat 8 imagery collected between 1995 and 2015 to produce a nearly complete map of ice flow velocity for Greenland at a far greater accuracy than most prior products. We evaluated the accuracy of this map by comparing it with a variety of measured and estimated velocities. For the slow-moving interior of the ice sheet, where estimates are determined from interferometric phase, the errors are ~2 m a−1 or better. For coastal areas, where estimates are determined entirely from speckle- or feature-tracking methods, errors are 2–3 m a−1, which is in good agreement with the estimated formal errors. Especially for the slow-moving majority of the ice sheet, this map provides an important source of data for numerous types of glaciological studies.

中文翻译：

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根据 20 多年收集的卫星数据得出的格陵兰冰速完整地图

虽然存在大量格陵兰冰流速图，但大多数地图的覆盖范围和/或准确性有限。我们处理了 1995 年至 2015 年间收集的大量合成孔径雷达和 Landsat 8 图像，以远高于大多数先前产品的精度生成了几乎完整的格陵兰冰流速图。我们通过将其与各种测量和估计的速度进行比较来评估该地图的准确性。对于冰盖缓慢移动的内部，估计是从干涉相位确定的，误差约为 2 ma-1或更好。对于沿海地区，估计完全由散斑或特征跟踪方法确定，误差为 2-3 ma-1，这与估计的形式误差非常吻合。特别是对于大部分缓慢移动的冰盖来说，这张地图为众多类型的冰川学研究提供了重要的数据来源。