Constraints on Venus Lightning From Akatsuki's First 3 Years in Orbit

DOI Web Site Web Site Web Site 参考文献27件
  • Ralph D. Lorenz
    Johns Hopkins Applied Physics Laboratory Laurel MD USA
  • Masataka Imai
    Artificial Intelligence Research Center National Institute of Advanced Industrial Science and Technology (AIST) Tokyo Japan
  • Yukihiro Takahashi
    Graduate School of Science Hokkaido University Sapporo Japan
  • Mitsuteru Sato
    Graduate School of Science Hokkaido University Sapporo Japan
  • Atsushi Yamazaki
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Japan
  • Takao M. Sato
    Space Information Center Hokkaido Information University Ebetsu Japan
  • Takeshi Imamura
    Graduate School of Frontier Sciences The University of Tokyo Kashiwa Japan
  • Takehiko Satoh
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Japan
  • Masato Nakamura
    Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Japan

書誌事項

公開日
2019-07-17
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2019gl083311
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>Observations by the Lightning and Airglow Camera on Japan's Venus Climate Orbiter “Akatsuki” over its first 3 years in orbit are reported. Forty‐two opportunities during low‐altitude nightside passes have accumulated 16.8 hr of observation, yielding an area‐time product of 81.6 ×10<jats:sup>6</jats:sup> km<jats:sup>2</jats:sup>‐hr, by far the largest at Venus itself to date. No flashes attributable to lightning have been detected, whereas similar observations at Earth would yield thousands of detections. A low flash rate of ~0.005 per million km<jats:sup>2</jats:sup>‐hr indicated in ground‐based observations is not excluded (but would require that there are not many more smaller flashes). The allowable flash rate is incompatible with the much higher rates of bursts recorded by magnetic and electric field sensors at Venus, indicating that electrical discharges at Venus lack optical emission or that the electromagnetic detections have a nonlightning explanation or both.</jats:p>

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