Abstract. Out of the two Venus flybys that BepiColombo uses as a gravity assist manoeuvre to finally arrive at Mercury, the first took place on 15 October 2020. After passing the bow shock, the spacecraft travelled along the induced magnetotail, crossing it mainly in the Y_VSO-direction. In this paper, the BepiColombo Mercury Planetary Orbiter Magnetometer (MPO-MAG) data are discussed, with support from three other plasma instruments: the Planetary Ion Camera (PICAM), the Mercury Electron Analyser (MEA) and the radiation monitor (BERM). Behind the bow shock crossing, the magnetic field showed a draping pattern consistent with field lines connected to the interplanetary magnetic field wrapping around the planet. This flyby showed a highly active magnetotail, with, e.g., strong flapping motions at a period of ~7 min. This activity was driven by solar wind conditions. Just before this flyby, Venus's induced magnetosphere was impacted by a stealth coronal mass ejection, of which the trailing side was still interacting with it during the flyby. This flyby is a unique opportunity to study the full length and structure of the induced magnetotail of Venus, indicating that the tail was most likely still present at about 48 Venus radii.

中文翻译：

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在BepiColombo的Venus 1飞越活动中，金星在活跃的太阳风条件下感应的磁层

摘要。在BepiColombo作为重力辅助机动最终到达水星的两次金星飞越中，第一次是在2020年10月15日发生。在经过船首冲击后，航天器沿着感应的磁尾飞行，主要在Y _VSO上越过-方向。本文在其他三种等离子体仪器的支持下，对BepiColombo汞行星轨道磁力仪（MPO-MAG）数据进行了讨论：行星离子照相机（PICAM），汞电子分析仪（MEA）和辐射监测器（BERM）。在弓形激波冲撞的背后，磁场表现出一种悬垂模式，该悬垂模式与连接到环绕行星的行星际磁场的磁力线相一致。飞越显示出高度活跃的磁尾，例如在约7分钟的时间内有强烈的拍打动作。这项活动是由太阳风条件驱动的。就在这次掠过之前，金星的感应磁层受到了日冕的隐形物质抛射的影响，在掠过过程中，尾侧仍在与之相互作用。