Hiraiso Solar Terrestrial Research Center, Communications Research Laboratory
Hiraiso Solar Terrestrial Research Center, Communications Research Laboratory
Arctic and Antarctic Research Institute
抄録(英)
Continuous short waves transmitted from Vostok Station (78°28′S, 106°48′E) were received at Syowa Station (69°00′S, 39°35′E) on monthly Regular World Days (RWDs). The transmitted frequencies were 14.985MHz from 0700 to 0900UT and 9.18MHz from 1600 to 1800UT. The cusp approached the midpoint of the circuit at the end of the UT morning transmission. Two kinds of Doppler structures were clearly recognized. Narrow band Doppler lines were consistently found during both morning and evening transmissions, whereas wide band Doppler structures dominated only in the morning. The wide band structures appeared and disappeared abruptly and sometimes had two spectrum peaks corresponding to velocities of separated irregularities around the midpoint. The narrow band structures still remained while the wide band structures changed spectrum shapes. Sawtooth-like Doppler structures were found in the narrow band lines in the morning transmissions.
雑誌書誌ID
AA10756224
雑誌名
Proceedings of the NIPR Symposium on Upper Atmosphere Physics
HF doppler observation between Vostok and Syowa, Antarctica
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KJ00000036089
(912.4KB)
概要
