@article{oai:nipr.repo.nii.ac.jp:00008127, author = {巻田, 和男 and MAKITA, Kazuo}, journal = {南極資料}, month = {Feb}, note = {P(論文), 昭和基地とみずほ基地とで同時に受信されたオーロラ・ヒス現象の比較を行ったところ多くの場合,ヒスの強度は現象により2地点でかなり異なっているが,ヒスのスペクトラムは比較的よく似ており,また発生時刻の時間差も2地点で1秒以上の差が認められなかった.これらの事実は,似たようなオーロラ・ヒスが地上て受信される範囲が,昭和基地とみずほ基地の距離(~270km)よりも広いことを示している.他方,人工衛星により撮影されたオーロラと地上のヒスとの関係から,オーロラの発光領域か600kmくらい離れるとヒスが受信されないことがはっきりした.このことはヒスの受信される最大の広がりが600km以内であることを示している.ヒスの伝搬路をray-tracingにより計算したところ,地上へ伝搬可能な領域の広がりは,ほぼ300kmであることが示され,観測結果をほぼ説明できる., Simultaneous observations of auroral hiss emissions have been carried out at Syowa and Mizuho Stations. The intensity of auroral hiss emissions was different from case by case at the two stations. However the spectral shapes of hiss emissions obtained at both stations were generally similar and the delay of the occurrence time of auroral hiss between the two stations can not be recoanized within one second accuracy. These results show that the observable scale of the similar auroral hiss on the ground is wider than the distance between Syowa and Mizuho Stations (~270 km). From the examinations of the auroral photographs observed on the DMSP satellite and the auroral hiss emissions observed on the ground, when the aurora is located farther than 600 km from the station, hiss emissions are not observed at the station reducing the threshold level (~10^<-16> W/m^2Hz), These results suggest that the maximum observable region is within about 600 km. The ray-tracing result shows that 8 kHz hiss waves departed from the duct at altitude of 3000 km on the geomagnetic field line of λ=700°spread over the around in scale of 300 km. This calculation result is consistent with our observation results.}, pages = {168--180}, title = {昭和・みずほ基地におけるヒス・スペクトラムの比較(c.磁気圏内の波動粒子相互作用)(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 I)}, volume = {68}, year = {1980}, yomi = {マキタ, カズオ} }