@article{oai:nipr.repo.nii.ac.jp:00001597, author = {Yamagishi, Hisao and Ono, Takayuki and Fukunishi, Hiroshi and Yamagami, Takamasa and Nishimura, Jun and Kodama, Masahiro and Hirasima, Yo and Murakami, Hiroyuki and Holtet, Jan A. and Ullaland, Stein and Pellinen, Risto J.}, journal = {Memoirs of National Institute of Polar Research. Special issue}, month = {Jul}, note = {P(論文), A stratospheric balloon, carrying a Nal (T1) scintillation counter for measuring 20-100keV bremsstrahlung X-rays was launched from Stamsund (L=5.6) in Norway during the recovery phase of a magnetic substorm. The scintillation counter recorded many examples of X-ray microbursts and pulsations at a ceiling altitude of 7mb (33km). The ground-based VLF receiver at Andφya (L=6.1), located at 160km northeast of Stamsund, and at Syowa Station, Antarctica (L=6.1) observed polar chorus emissions and quasi-periodic (QP) emissions during the balloon flight. In the study of cross correlations between the X-ray and the VLF emissions, it has been found that the X-ray microbursts precede VLF chorus at Andφya by about 1.7s, while the VLF chorus at Syowa occurred almost simultaneously with the X-ray microbursts. This is qualitatively explained by the nature of counterstreaming type wave-particle interaction and the echoing of whistler mode wave packets in the magnetosphere. X-ray pulsations and rising-tone type QP emissions with periods of 20-30s showed a good coherency. This similarity suggests that both phenomena are closely related to each other through the cyclotron wave-particle interaction in the magnetosphere.}, pages = {124--136}, title = {Auroral zone X-ray pulsations associated with VLF pulsations: B15-3N balloon experiment}, volume = {31}, year = {1984} }