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On-Deck Seismology: Lessons fromInSight for Future Planetary Seismology

机译:在甲板地震学:未来行星地震学的课程

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摘要

Before deploying to the surface of Mars, the short-period (SP) seismometer of the InSight mission operated on deck for a total of 48 hr. This data set can be used to understand how deck-mounted seismometers can be used in future landed missions to Mars, Europa, and other planetary bodies. While operating on deck, the SP seismometer showed signals comparable to the Viking-2 seismometer near 3 Hz where the sensitivity of the Viking instrument peaked. Wind sensitivity showed similar patterns to the Viking instrument, although amplitudes on InSight were ~80% larger for a given wind velocity. However, during the low-wind evening hours, the instrument noise levels at frequencies between 0.1 and 1 Hz were comparable to quiet stations on Earth, although deployment to the surface below the Wind and Thermal Shield lowered installation noise by roughly 40 dB in acceleration power. With the observed noise levels and estimated seismicity rates for Mars, detection probability for quakes for a deck-mounted instrument is low enough that up to years of on-deck recordings may be necessary to observe an event. Because the noise is dominated by wind acting on the lander, though, deck-mounted seismometers may be more practical for deployment on airless bodies, and it is important to evaluate the seismicity of the target body and the specific design of the lander. Detection probabilities for operation on Europa reach over 99% for some proposed seismicity models for a similar duration of operation if noise levels are comparable to low-wind time periods on Mars.
机译:在部署到火星的表面之前,洞察团的短期(SP)地震计在甲板上运营,共计48小时。该数据集可用于了解甲板安装的地震仪如何在未来的降落的任务中用于火星,Europa和其他行星机构。在甲板上运行时,SP地震表显示出与viking-2地震表相当的信号,接近3 Hz,其中Viking仪器的灵敏度达到峰值。风敏感性向维京仪器显示出类似的图案,尽管给定的风速升性的洞察力幅度〜80%。但是,在低风光傍晚的时间内,0.1和1 Hz之间的频率的仪器噪声水平与地球上的安静站相当,尽管在风和热屏蔽下方的表面下降,加速功率大约为40 dB。 。通过观察到的噪声水平和MAR的估计地震性速率,甲板安装仪器的Quakes的检测概率足够低,可能需要多年的甲板录制来观察事件。因为噪音是由风中的风力占据主导地位,因为甲板安装的地震仪可能更加实用,可以更实用地在无气体上部署,并且重要的是评估目标身体的地震性和着陆器的具体设计。如果噪声水平与火星上的低风时间段相当,欧罗巴对欧罗巴对欧罗巴的操作的操作达到超过99%的概率。

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  • 作者单位

    Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA;

    Department of Electrical and Electronic Engineering Imperial College London London UK;

    Planetology and Space Science Team Université de Paris Institut de Physique du Globe CNRS Paris France;

    Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA;

    Department of Electronics Optronics and Signal Processing ISAE-SUPAERO Toulouse France;

    Cornell Center for Astrophysics &

    Planetary Science Cornell University Ithaca NY USA;

    Department of Electrical and Electronic Engineering Imperial College London London UK;

    Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA;

    Applied Physics Laboratory Johns Hopkins University Baltimore MD USA;

    Geology Department University of Maryland College Park MD USA;

    Department of Electrical and Electronic Engineering Imperial College London London UK;

    Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA;

    Institute for Geophysics Department of Earth Sciences ETH Zürich Zürich Switzerland;

    Department of Electrical and Electronic Engineering Imperial College London London UK;

    Atmospheric Oceanic and Planetary Physics Department University of Oxford Oxford UK;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 行星、卫星、彗星、流星、陨星;
  • 关键词

    Seismology; Sight; Future Planetary Seismology;

    机译:地震学;视觉;未来行星地震学;

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