Nadir videos taken during low-altitude transects of the Arctic Network of national park units and Selawik National Wildlife Refuge, Alaska, July 2013

Nadir videos shot from a GoPro Hero3 Black Edition (focal length 2.77 mm) of the arctic landscape during low altitude transects at the rate of 60 frames per second. Transects were conducted from small aircraft over the National Park Service’s Bering Land Bridge National Preserve and the U.S. Fish and Wildlife Service’s Selawik National Wildlife Refuge in northwest Alaska.

本数据集包含使用GoPro Hero3黑色版（GoPro Hero3 Black Edition）相机拍摄的天底（nadir）视角视频，相机焦距为2.77毫米，拍摄内容为北极景观，拍摄于低空飞越样带飞行期间，帧率达60帧每秒。本次低空飞越样带由小型航空器执行，覆盖范围涵盖阿拉斯加西北部的美国国家公园管理局（National Park Service）白令陆桥国家保留地，以及美国鱼类及野生动物管理局（U.S. Fish and Wildlife Service）塞拉威克国家野生动物保护区。