VLF wave generation by beating of two HF waves in the ionosphere

Details VLF wave generation by beating of two HF waves in the ionosphere VLF wave generation by beating of two HF waves in the ionosphere

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3810608k&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 10, CiteID L10608

Physics

Plasma Physics

2

Ionosphere: Active Experiments, Ionosphere: Ionospheric Irregularities, Space Plasma Physics: Active Perturbation Experiments, Space Plasma Physics: Wave/Particle Interactions (2483, 6984)

Scientific paper

Theory of a beat-wave mechanism for very low frequency (VLF) wave generation in the ionosphere is presented. The VLF current is produced by beating two high power HF waves of slightly different frequencies through the nonlinearity and inhomogeneity of the ionospheric plasma. Theory also shows that the density irregularities can enhance the beat-wave generation. An experiment was conducted by transmitting two high power HF waves of 3.2 MHz and 3.2 MHz + f, where f = 5, 8, 13, and 2.02 kHz, from the HAARP transmitter. In the experiment, the ionosphere was underdense to the O-mode heater, i.e., the heater frequency f0 > foF2, and overdense or slightly underdense to the X-mode heater, i.e., f0 < fxF2 or f0 ≥ fxF2. The radiation intensity increased with the VLF wave frequency, was much stronger with the X-mode heaters, and was not sensitive to the electrojet. The strongest VLF radiation of 13 kHz was generated when the reflection layer of the X-mode heater was just slightly below the foF2 layer and the spread of the O-mode sounding echoes had the largest enhancement, suggesting an optimal setting for beat-wave generation of VLF waves by the HF heaters.

Affiliated with

Also associated with

No associations

Rating

VLF wave generation by beating of two HF waves in the ionosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with VLF wave generation by beating of two HF waves in the ionosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VLF wave generation by beating of two HF waves in the ionosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-927478