@article{oai:nipr.repo.nii.ac.jp:00004066, author = {Hattori, Katsumi and Hayakawa, Masashi and Shimakura, Shin and Parrot, Michel and Lefeuvre, Francois}, journal = {Proceedings of the NIPR Symposium on Upper Atmosphere Physics}, month = {Nov}, note = {P(論文), The co-existence of hiss and chorus is frequently observed on board satellites in the outer magnetosphere, and chorus emissions are observed in the data from GEOS-1 satellite to start nearly at the uppermost frequency of the hiss band. The direction finding measurements have been made for these hiss-triggered chorus events. On the basis of the direction finding results and detailed analysis of the fine structures in the hiss band, we have suggested a generation model how a chorus is triggered by a hiss such that some coherent wavelets near the top of the hiss band phase-bunch electrons at the equator, and these phasebunched electrons radiate a coherent signal as they move away from the equator. Also, theoretical computations have been carried out in order to explain the df/dt, θ value (the polar angle between the wave normal direction and the Earth's magnetic field) and other factors by means of a two-dimensional ray-tracing method. The differences between the experimental and theoretical values are pointed out, and some possibilities to remedy these discrepancies are discussed.}, pages = {84--95}, title = {GEOS-1 observation of hiss-triggered chorus emissions in the outer magnetosphere and their generation model}, volume = {2}, year = {1989} }