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The High Frequency Active Auroral Research Program (HAARP) is an investigation project jointly funded by the US Air Force, the US Navy, the University of Alaska, and the Defense Advanced Research Projects Agency (DARPA). Its purpose is to investigate the ionosphere and establish whether some of its properties can be used for communication or surveillance purposes. Started in 1993, the project is proposed to last for a period of twenty years. The system was designed and built by Advanced Power Technologies (APTI) and since 2003, by BAE Advanced Technologies.
The facility currently operates a VHF and UHF radar, a fluxgate magnetometer, a digisonde, and an induction magnetometer alongside the transmitter facilities.