Impact-Seismic Investigations of the InSight Mission
Impact-Seismic Investigations of the InSight Mission
复制标题
洞察号任务的冲击地震研究
DOI：
10.1007/s11214-018-0562-x
复制
发表时间：
2018
影响因子：
10.3
通讯作者：
Daubar I
中科院分区：
文献类型：
--
作者：
Daubar I
撞击调查将是洞察号使命的一个重要方面。该使命的科学目标之一是测量目前火星上的撞击率。影响将另外通知的主要目标调查的内部结构的火星。在本文中，我们回顾了目前的知识状态地震信号的影响地球，月球和实验室实验。我们描述了广义的物理模型，可以用来解释这些信号。讨论了适当的源时间函数的影响，沿着的频谱特性，包括截止频率和它的依赖性的影响动量。对地震效率（地震能量与撞击能量之比）的估计差异很大。我们对火星地震效率的首选值是，我们建议使用它，直到我们可以在InSight使命期间测量它，当地震矩不直接使用时。被认为是在影响点和在地震检波器的位置的材料特性的影响。我们也讨论了火流星产生空气爆炸和声波的过程，以及探测这些信号的可行性，然后我们考虑了撞击火星的情况。本文回顾了目前对火星撞击坑的认识：目前的撞击速率、撞击物的特性，如速度和方向，以及撞击物造成的撞击坑的形态。提出了几种将弹坑尺寸与撞击能量进行换算的方法。火星的大气层，虽然薄，将导致碎片的冲击，与由此产生的地震signals.We也基准几个不同的地震建模代码中使用的影响检测分析，这些代码被用来探索地震振幅的影响引起的信号作为距离的函数的影响网站。我们预测，在主要使命（一个火星年）的时间范围内，通过探测到几到几十次撞击，可以测量当前的撞击通量。然而，这些预测的误差条很大。具体到洞察力使命，我们列出了地震信号的判别器，这些判别器将用于区分地震信号和地震。我们描述了洞察力影响科学主题组在使命操作期间的作用，包括可能的夜间流星成像计划。InSight使命期间通过这些方法检测到的影响将用于改进内部结构模型、测量地震效率以及计算当前影响的大小频率分布。
Impact investigations will be an important aspect of the InSight mission. One of the scientific goals of the mission is a measurement of the current impact rate at Mars. Impacts will additionally inform the major goal of investigating the interior structure of Mars.In this paper, we review the current state of knowledge about seismic signals from impacts on the Earth, Moon, and laboratory experiments. We describe the generalized physical models that can be used to explain these signals. A discussion of the appropriate source time function for impacts is presented, along with spectral characteristics including the cutoff frequency and its dependence on impact momentum. Estimates of the seismic efficiency (ratio between seismic and impact energies) vary widely. Our preferred value for the seismic efficiency at Mars is, which we recommend using until we can measure it during the InSight mission, when seismic moments are not used directly. Effects of the material properties at the impact point and at the seismometer location are considered. We also discuss the processes by which airbursts and acoustic waves emanate from bolides, and the feasibility of detecting such signals.We then consider the case of impacts on Mars. A review is given of the current knowledge of present-day cratering on Mars: the current impact rate, characteristics of those impactors such as velocity and directions, and the morphologies of the craters those impactors create. Several methods of scaling crater size to impact energy are presented. The Martian atmosphere, although thin, will cause fragmentation of impactors, with implications for the resulting seismic signals.We also benchmark several different seismic modeling codes to be used in analysis of impact detections, and those codes are used to explore the seismic amplitude of impact-induced signals as a function of distance from the impact site. We predict a measurement of the current impact flux will be possible within the timeframe of the prime mission (one Mars year) with the detection of ∼ a few to several tens of impacts. However, the error bars on these predictions are large.Specific to the InSight mission, we list discriminators of seismic signals from impacts that will be used to distinguish them from marsquakes. We describe the role of the InSight Impacts Science Theme Group during mission operations, including a plan for possible night-time meteor imaging. The impacts detected by these methods during the InSight mission will be used to improve interior structure models, measure the seismic efficiency, and calculate the size frequency distribution of current impacts.
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影响因子：
10.3
作者：
P. Morgan;M. Grott;B. Knapmeyer‐Endrun;M. Golombek;P. Delage;P. Lognonné;S. Piqueux;I. Daubar;N. Murdoch;C. Charalambous;W. Pike;N. Müller;A. Hagermann;M. Siegler;R. Lichtenheldt;N. Teanby;S. Kedar
通讯作者：
P. Morgan;M. Grott;B. Knapmeyer‐Endrun;M. Golombek;P. Delage;P. Lognonné;S. Piqueux;I. Daubar;N. Murdoch;C. Charalambous;W. Pike;N. Müller;A. Hagermann;M. Siegler;R. Lichtenheldt;N. Teanby;S. Kedar
火星极乐平原拟议 InSight 着陆点浅层结构的瑞利波椭圆率建模和反演
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
B. Knapmeyer‐Endrun;M. Golombek;M. Ohrnberger
通讯作者：
M. Ohrnberger
2018年洞察任务
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
W. Banerdt;S. Smrekar;T. Hoffman;S. Spath;P. Lognonné;T. Spohn;H. Stone;J. Willis;J. Feldman;R. D. Paula;R. Turner;S. Asmar;D. Banfield;U. Christensen;J. Clinton;V. Dehant;W. Folkner;Rasmo Garcia;D. Giardini;M. Golombek;M. Grott;T. Hudson;C. Johnson;G. Kargl;B. Knapmeyer‐Endrun;J. Maki;D. Mimoun;A. Mocquet;P. Morgan;M. Panning;W. Pike;C. Russell;N. Teanby;J. Tromp;R. Weber;M. Wieczorek;K. Hurst;E. Barrett
通讯作者：
E. Barrett
地下封闭爆炸弹性辐射的解析近似
DOI：
--
发表时间：
1967
期刊：
影响因子：
--
作者：
N. A. Haskell
通讯作者：
N. A. Haskell
舒梅克-利维 9 号彗星撞击激发木星地震波
DOI：
--
发表时间：
1994
期刊：
影响因子：
--
作者：
P. Lognonné;B. Mosser;F. Dahlen
通讯作者：
F. Dahlen