摘要：Among VLF wave phenomena observed by the S-310JA-1 rocket, what is thought as a kind of plasma wave phenomenon has been investigated in detail. The phenomenon is characteristic in that its frequency was spin-modulated and it appeared once during one spin period, and it was detected with a ferrite core loop antenna as well as with a 28 m dipole antenna. It is concluded that this phenomenon may be an electrostatic wave with a wave length of the order of 10 cm. The loop antenna is considered to have worked as an electric sensor by the whip antenna effect, when the phenomenon was detected. It is also found that the 28 m dipole antenna is a very short antenna with an effective length of ～1 mm for the above plasma wave. Therefore, the phenomenon can be quantitatively understood from these characteristics of the antennas.
其他摘要：S-310JA-1号ロケットにより観測されたVLF波動現象のうち,プラスマ波現象と思われるものについて特に詳細に調べられた.この現象は次の特徴をもつ.すなわちその周波数はロケットスピンにしたかって変化し,1スピン周期毎にタイナミックスペクトル上で逆U字形が1つ現れる.また,ループ,タイポールアソテナ両者て検出されたこの現象は,波長10 cm 程度の静電的波動てあろうと結論された.ループアンテナでは,実効長数mmのホイップアンテナ効果によって検出されたと考えられ,また,28mタイポールは,上記の波長の縦波に対しては,実行長か1mm程度となることか明らかとなり,観測された現象の特性が,定量的にも理解されたと考えられる.
