To that end, DARPA and the U.S.Air Force are experimenting with the VLF transmitters at the High Frequency Active Auroral Research Project (HAARP) facility in Gakona, Alaska.

• 为完成这个目标，DARPA和美国空军在高频活动极光研究计画（HAARP）位于阿拉斯加加科纳的实验室，试验VLF发射器。