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- W2007344260 abstract "Interactions in the magnetosphere between man‐made whistler mode waves and electrons can produce either an enhancement of the wave or the generation of waves at a different frequency. Furthermore, natural emissions can be frequency shifted or modified by a nearby transmitter signal. Injection of extremely low frequency waves into the outer magnetosphere was initiated in 1978 in Norway by both the University of Paris and The Aerospace Corporation. The antenna is a 10.6‐km power line tuned to the transmitted frequency. The University of Paris used a 1‐kW transmitter to drive the antenna with a maximum current of 8 A. The Aerospace Corporation used the transportable very low frequency transmitter with a typical antenna current between 20 and 45 A. Experiments were conducted at times when the GEOS 2 and SCATHA satellites were near the magnetic meridian of the transmitter. The transmissions consisted of either a keyed fixed frequency or continuous waves swept in frequency. Emissions correlated with the transmissions were detected by the satellite receivers on several dates. Although the satellites were within a few degrees of the magnetic meridian of the transmitter, emissions influenced by the transmissions are seen during only a small fraction (<10%) of the total transmission time. With the first type of transmission, signals similar to power line harmonic radiation were recorded. Artificially stimulated emissions are also likely to have been triggered. Both types of transmissions triggered or enhanced hiss at a constant frequency during fixed‐frequency transmissions and at a variable frequency during a swept‐frequency transmission. During swept‐frequency transmission there occurred two examples of natural emissions shifting in frequency by the man‐made signal. Electron cyclotron harmonic emissions also appear to have been shifted in frequency by the man‐made signal." @default.
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- W2007344260 date "1982-04-01" @default.
- W2007344260 modified "2023-09-26" @default.
- W2007344260 title "Stimulated wave-particle interactions during high-latitude ELF wave injection experiments" @default.
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- W2007344260 doi "https://doi.org/10.1029/ja087ia04p02347" @default.
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