| Summary: | Initial results from an active wave injection experiment aimed at studying coherent VLF wave propagation and wave-particle interactions in the magnetosphere are presented. The VLF signals were injected from a transmitting facility at Siple Station, Antarctica, and were received on the high-altitude, polar-orbiting Dynamics Explorer 1 satellite. Data received by the satellite are described and measurements of the propagation delay, signal amplitude, and in situ electron densities are discussed. Ray propagation paths to the satellite for two days are discussed, and sidebands associated with Siple signals observed on one of the days are presented.
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