Nd. Borisov et al., GENERATION OF LOW-FREQUENCY EMISSION BY POWERFUL HF RADIO-WAVES IN THE EARTHS IONOSPHERE, Physics letters. A, 177(3), 1993, pp. 241-247
We discuss artificial low-frequency emission generated via a decay pro
cess during the heating of the ionosphere by HF electromagnetic waves.
The spectral characteristics of the emission and its intensity are fo
und.