| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
In this study, we tried to make imaging observation of acoustic waves in the upper atmosphere through OH airglow. Although we could not detect any acoustic-wave signatures in the airglow images obtained during special campaigns in 2016, this study offers valuable insights into the acoustic waves in the upper atmosphere: acoustic waves would induce small (less than 3%) airglow intensity perturbations and/or would be even less likely to propagate into the upper atmosphere compared to gravity waves. Additionally, the low-cost airglow camera developed in this study will greatly help an expansion in ground-based airglow imaging network.
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