Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University
抄録(英)
Highlights of recent Stanford University VLF research in the Antarctic include new observations of wave-induced particle precipitation and controlled experiments on nonlinear wave growth phenomena. Higher-than-expected levels of burst precipitation have been discovered inside the plasmasphere, near L=2,using subionospheric signal perturbations called "Trimpi events". Studies of burst precipitation have been extended to the region poleward of the plasmapause using the Siple transmitter signal as a waveguide probe. Experiments on the "coherent wave instability", using the amplitude and frequency modulation capability of the new Siple transmitter, have produced exciting new results. Examples are : 1) better definition of the power threshold for the stimulation of temporal wave growth, 2) generation of strong sidebands by unamplified "beat" waves and 3) generation of chorus-like elements within a band of simulated hiss. Using a new digital processing technique developed at Stanford, new features of the phase behavior of growing waves have been found. Opportunities for extending these experiments are discussed.
雑誌書誌ID
AA00733561
雑誌名
Memoirs of National Institute of Polar Research. Special issue
Recent research on magnetospheric wave-particle interactions
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KJ00000012440
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概要
