Barr, R.; Rietveld, Michael T.; Stubbe, P. (Journal article; Peer reviewed; Tidsskriftartikkel, 1999)
This paper describes the results of a preliminary study to determine the effective heating and cooling time constants of ionospheric currents in a simulated modulated HF heating, `beam painting' configuration. It has been found that even and odd harmonics of the fundamental ELF wave used to amplitude modulate the HF heater are sourced from different regions of the ionosphere which support significantly ...