@article{oai:nipr.repo.nii.ac.jp:00004043,
 author = {Iyemori, Toshihiko},
 journal = {Proceedings of the NIPR Symposium on Upper Atmosphere Physics},
 month = {Feb},
 note = {P(論文), Hydromagnetic wave characteristics at ionospheric altitude have been statistically detected in the MAGSAT magnetic field data by a cross-spectral analysis. The region where the averaged phase shift between the north-south and the east-west components has some finite value appeared systematically around the auroral oval, indicating an existence of the hydromagnetic wave component of comparable magnitude with the magnetic fluctuation generated by small-scale field-aligned currents. The low frequency waves (0.125-0.25Hz) showed left-handed polarization (L-mode) and the amplitude was around 5-10nT. On the other hand, the R-mode waves dominated in 1.0-2.0Hz range and the amplitude was estimated to be about 1nT.},
 pages = {146--152},
 title = {A statistical study of ULF waves observed by MAGSAT at ionospheric altitude},
 volume = {1},
 year = {1988}
}