@article{oai:nipr.repo.nii.ac.jp:00004032,
 author = {Sagawa, Eiichi and Yamagishi, Hisao and Miyaoka, Hiroshi and Kaya, Nobuyuki and Mukai, Toshifumi},
 journal = {Proceedings of the NIPR Symposium on Upper Atmosphere Physics},
 month = {Feb},
 note = {P(論文), An instrument has been developed for observing the high frequency modulations or fluctuations (upto several megahertzs) of the auroral electron flux. The instrument utilizes an on-board processing hardware for calculating autocorrelation functions of particle flux measured by any type of particle detector which output a series of pulses. Two rocket observations by using the instrument were carried out as a part of low energy auroral electron experiments on board the S-310JA-11 and -12 rockets which were launched into the Antarctic auroral ionosphere. The instrument is capable of measuring the flux modulations in three frequency ranges, i. e. 1.5-100Hz, 0.1-8kHz and 0.1-4MHz, respectively. Results from one rocket experiment launched under relatively quiet conditions indicate that the auroral electrons are almost uniform in the high frequency range. Results from another rocket experiment (JA-12) conducted under highly active aurora conditions show low frequency modulations of electron flux associated with a strong electron precipitation.},
 pages = {37--45},
 title = {Rocket observations of modulations of the low energy electron flux in the auroral ionosphere},
 volume = {1},
 year = {1988}
}