2022 Fiscal Year Final Research Report
Venus' Surface emissivity observed by Akatsuki IR1 camera
| Project/Area Number |
20K04042
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 17010:Space and planetary sciences-related
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| Research Institution | Okayama University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 金星 / 地表 |
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| Outline of Final Research Achievements |
The emissivity of the Venus' surface was estimated using images taken by the IR1 camera onboard Akatsuki. We confirmed that most of the Venus' night side images were affected by stray light. Moreover, the absolute values of the radiance were shifted. We estimated the surface emissivity by selecting data which is less affected by stray light, though it was difficult to constrain the Venus' surface material. We need to establish a correction method for stray light and a recalibration of the radiance.
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| Free Research Field |
惑星科学
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| Academic Significance and Societal Importance of the Research Achievements |
金星探査機あかつきが取得した金星夜面のデータは，迷光や放射輝度較正といった問題を抱えているが，それらを補正することで金星地表物質に関する情報を抽出できる可能性がある．金星の地表物質を推定することは，地球の双子とも呼ばれる金星の表層環境が地球と大きく異なっている理由や，地球のような生命を育む惑星が形成される条件を解明することにつながる．宇宙における知的生命の存在確率を議論するための基礎となる知見を創出するものである．
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