Page "High Frequency Active Auroral Research Program" Paragraph 7

The HAARP project directs a 3. 6 MW signal, in the 2. 8 – 10 MHz region of the HF ( high-frequency ) band, into the ionosphere.

The signal may be pulsed or continuous.

Then, effects of the transmission and any recovery period can be examined using associated instrumentation, including VHF and UHF radars, HF receivers, and optical cameras.

According to the HAARP team, this will advance the study of basic natural processes that occur in the ionosphere under the natural but much stronger influence of solar interaction, and how the natural ionosphere affects radio signals.