Rocket observations of modulations of the low energy electron flux in the auroral ionosphere
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 parti...
| Main Authors: | , , , , |
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| Language: | English |
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National Institute of Polar Research
1988
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| Subjects: | |
| Online Access: | https://nipr.repo.nii.ac.jp/record/4032/files/KJ00000035878.pdf https://doi.org/10.15094/00004032 https://nipr.repo.nii.ac.jp/records/4032 |
| Summary: | 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. departmental bulletin paper |
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