電離層内の長波,中波帯電波雑音および銀河電波の観測

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概要

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• Rocket observations of radio noises in LF band have been made since 1962. Impulsive noises of 2〜50μV/m at 31kc/s (⊿f=1kc/s) observed by K-9 M-6 seem to be realbut their origin is not clear. Noise level at about 100 kc/s seems to be less than 1μV/m at ⊿f=1kc/s in the ionosphere up to 350km. Radio noises in the ionosphere and Galactic emissions were observed at 3 0 Mc/s by L-3H-1. The noise in the ionosphere was maximum near the critical plasma layer at which the equivalent noise temperature was about 10^<70>K (0.2 μV/m at ⊿f=1kc/s), if the noise is due to electromagnetic waves This result is consistent with the excess noises recorded in the measurements of the Galaxy by rockets and satellites in USA and UK. These noises in the MF band, however may be attributed to the electrostatic field of thermal or nonthermal plasma oscillations

• 宇宙航空研究開発機構の論文

著者

• 高倉 達雄

  東京天文台

関連論文

• 4a-KE-5 太陽硬X線発生源の精密測定
• 3p-R-1 太陽(Solar Technique Physicsシンポジウム)
• M.R. Kundu: Solar Radio Astronomy, Interscience Publishers, New York, 1965, 660頁, 15×23cm, 7,900円.
• 電離層内の長波,中波帯電波雑音および銀河電波の観測
• Space Physics 研究体制に望む
• II. 太陽大気中の Collisionless Shock (Part A. Solar Plasma と地球の相互作用)
• Annual Review of Astronomy and Astrophysics, Vol. 2. Annual Reviews, Inc., Califarnia, 1964, 462頁, 16×23cm, 3,600円.
• Annual Review of Astronomy and Astrophysics, Vol. 1, Annual Review, Inc., California, 1963, 418頁, 23×16cm, 3,600円 ($9.00).

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