@inproceedings{oai:jaxa.repo.nii.ac.jp:00005207,
 author = {亘, 慎一 and Watari, Shinichi},
 book = {宇宙航空研究開発機構特別資料: 第5回「宇宙環境シンポジウム」講演論文集, JAXA Special Publication: Proceeding of the 5th Spacecraft Environment Symposium},
 month = {Mar},
 note = {第5回宇宙環境シンポジウム(2008年12月18日-12月19日. つくば国際会議場）, Forecast of amplitude of a new cycle is important for space weather. Because many intense space storms tend to occur in the cycle with a large maximum sunspot number. These intense storms cause failure of manmade technical systems. We report the result of statistical analysis of occurrence of no-sunspot days around solar minimum and forecast of maximum sunspot number of Cycle 24 using the occurrence of no-sunspot days., 資料番号: AA0064382018, レポート番号: JAXA-SP-08-018},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {サイクル23の極小とサイクル24の極大について},
 volume = {JAXA-SP-08-018},
 year = {2009}
}