@article{oai:nipr.repo.nii.ac.jp:00008163,
 author = {前田, 佐和子 and 半田, 駿 and MAEDA, Sawako and HANDA, Shun},
 journal = {南極資料},
 month = {Mar},
 note = {P(論文), 日本国内4電波観測所のf_0F2を使って,周期50分から150分の大規模TIDs(l.s. TIDs)の水平波面速度の分散特性を調べた.解析期間は1957年11月から,1974年7月までである.このデータをクロススペクトル解析することにより,各周期成分に対する速度と方向を算出した.その結果,水平波面速度は,周期150分で341m/s-976m/s,75分で293m/s-884m/s,50分で256m/s-745m/sの範囲に分布した.一般的な分散特性としては速度が周期に対して正の相関をもつ傾向にある.波の伝搬方向は主として南向きである.さらに南西の方向に伝搬するもう1つの波群が存在する.周期50分と150分の成分では,極域磁場の活動度が高い時,水平波面速度が増大する., A study of the horizontal velocity dispersion of l.s. TIDs (large-scale traveling ionospheric disturbances), in the 50-150 min period range, was made by using observations recorded from November 1957 to July 1974 of f_0F2 in f-plots at four ionospheric observatories distributed in Japan. The speeds and the azimuths of the Fourier components of these disturbances were calculated by performing the cross-spectral analysis to provide dispersion characteristics. The range of horizontal phase trace velocities lies between 341 m/s and 976 m/s in a period of 150 min. between 293 m/s and 884 m/s in a period of 75 min and between 256 m/s and 745 m/s in a period of 50 min. The general tendency of the dispersion is such that the horizontal phase trace velocity increases with period. The direction of the wave propagation is mainly southward, and there is another wave group of which the direction of motion is about southwestward. The polar magnetic activity is positively correlated with the horizontal phase trace velocity at 50 and 150 min components.},
 pages = {150--162},
 title = {電離層F2領域における大規模TIDs(f.極域電離層)(第2回極域における電離圏磁気圏総合観測シンポジウム : Part II)},
 volume = {69},
 year = {1980},
 yomi = {マエダ, サワコ and ハンダ, シュン}
}