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電離層擾乱観測用短波送信システムの開発
https://uec.repo.nii.ac.jp/records/6813
https://uec.repo.nii.ac.jp/records/68135cf29815-5bf9-45a9-a14c-83ee7d2f6fb6
名前 / ファイル | ライセンス | アクション |
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9000000186.pdf (4.1 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2010-02-17 | |||||
タイトル | ||||||
言語 | ja | |||||
タイトル | 電離層擾乱観測用短波送信システムの開発 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Development of HF Transmission System Specialized for Ionospheric Disturbance Observation | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
言語 | en | |||||
主題 | HF-band Doppler sounding | |||||
キーワード | ||||||
言語 | en | |||||
主題 | HFD | |||||
キーワード | ||||||
言語 | en | |||||
主題 | ionospheric disturbance | |||||
キーワード | ||||||
言語 | en | |||||
主題 | radio sounding | |||||
キーワード | ||||||
言語 | en | |||||
主題 | HF-band stable transmission system | |||||
キーワード | ||||||
言語 | en | |||||
主題 | JG2XA | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
冨澤, 一郎
× 冨澤, 一郎× 柴田, 喬× 奥澤, 隆志× 有澤, 豊志× 瀬尾, 洋一× 足立, 登 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Radio sounding techniques have commonly been used for observation of ionospheric disturbances because of their high sensitivities in detecting signals reflected or scattered by electrons or ions in disturbed regions. High-Frequency-band Doppler(HFD) observation technique is the most sensitive one for detecting movement of the disturbed regions since it can be applied for the spectral analyzing technique. It is therefore popular that the HFD technique has long been used for this purpose. However, we had to give up the HFD observation since the reference signal transmitted as the HF-band standard signal station JJY were reported in termination at the end of March in 2001.<P> Then, we started the project in 2000 for constructing a new reference transmitting station to continue the HFD observation. We had been developing an HF transmitting station specialized for the HFD observations. The new HF transmitting station with 200 W has the sufficient stability to detect as small deviation as 10-8 within the 1,000 km range from the UEC Chofu-campus in Tokyo.<P>The transmission frequencies, 5.006 and 8.006 MHz, are allocated based on the research of minimum interfering frequencies close to the old-JJY transmission frequencies, 5 and 8 MHz. To minimize spurious caused by inter modulation distortion both in transmitter and in receiver, the amplitude modulation of the station ID is set in single sideband with low modulation index. The HFD station, JG2XA, started transmission on July 3, 2001, and it continues transmission for HFD observations since then. | |||||
書誌情報 |
ja : 電気通信大学紀要 巻 16, 号 1, p. 83-93, 発行日 2003-07-31 |
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出版者 | ||||||
出版者 | 電気通信大学 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-0935 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |