Abstract
Using the powerful HF heater to modulate the ionospheric electrojet current, ELF/VLF waves have been generated, as observed in many ionospheric heating experiments. Two heater-modulation schemes are considered in this paper. One modulates the heater with a rectangular periodic pulse. The other uses two overlapping heater waves having a frequency difference equal to the desired modulation frequency. The nonlinear evolutions of the generated ELF/VLF waves are determined numerically. Their spectra are also evaluated. Results show that the signal quality of the emissions deteriorates with the modulation frequency. On the other hand, the field intensity of the emission at the fundamental modulation frequency increases with the modulation frequency.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 103 |
| Number of pages | 1 |
| Journal | IEEE International Conference on Plasma Science |
| State | Published - 1994 |
| Event | Proceedings of the IEEE International Conference on Plasma Science - Santa Fe, NM, USA Duration: Jun 6 1994 → Jun 8 1994 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering