Rocket exhaust driven amplification (REDA) of VLF waves in space

A method of using at least one Lower Hybrid wave source in atmospheric plasma to reduce a density of one of killer energetic protons and killer energetic electrons in a Van Allen radiation belt, the method comprising:

• transmitting into space a very low frequency (VLF) wave using a VLF transmitter, the VLF wave being converted in space to an ambient wave, the ambient wave acting as a signal wave for a parametric amplifier;
• and
• generating a Lower Hybrid wave in the atmospheric plasma using the at least one Lower Hybrid wave source, the Lower Hybrid wave acting as a pump wave for the parametric amplifier,
• wherein nonlinear mixing of the signal wave and the pump wave in the atmospheric plasma simultaneously parametrically amplifies the ambient wave and generates an idler wave for the parametric amplifier and a parametrically amplified wave,
• wherein, for the parametric amplifier, the pump wave comprises a frequency f0, the ambient wave comprises a frequency f1, and the idler wave comprises a frequency f2, the frequency f0 being equal to a sum of the frequency f1;
• and the frequency f2,
• wherein the parametrically amplified wave reduces the density of one of the killer energetic protons and the killer energetic electrons in the Van Allen radiation belt,
• wherein the method further comprises one of:
• receiving directly the parametrically amplified wave using a VLF receiver, thereby improving long range communications between the VLF transmitter and the VLF receiver;
• and
• receiving indirectly via reflection off an earth surface the parametrically amplified wave using the VLF receiver, thereby detecting underground structures.