The Sondrestrom Upper Atmospheric Research Facility has a 32-metre-wide radar dish. It measures conductivity from an altitude of 60km to600km and has helped define the cusp's circuitry.

桑德日斯多姆高层大气科学研究所（Sondrestrom Upper Atmospheric Research Facility）拥有一个32米宽的雷达抛物面天线反射镜（radar dish），它可以检测到从海拔60公里至600公里的传导性并有助于详细说明尖端的电路结构。

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Global Hawk can pick out objects as small as a truck with its synthetic aperture radar, which uses the plane's flight path to simulate the curve of a radar dish several hundred meters long.

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