著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) M. Ghezelbash and A. V. Koustov and D. R. Themens and P. T. Jayachandran,Seasonal and diurnal variations of PolarDARN F region echo occurrence in the polar cap and their causes,Journal of Geophysical Research: Space Physics,2169-9380,American Geophysical Union (AGU),2014-12,119,12,10426,https://cir.nii.ac.jp/crid/1363670320531009792,https://doi.org/10.1002/2014ja020726