当前位置: X-MOL 学术Earth Space Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Detection, Analysis, and Removal of Glitches From InSight's Seismic Data From Mars
Earth and Space Science ( IF 2.9 ) Pub Date : 2020-10-14 , DOI: 10.1029/2020ea001317
John‐Robert Scholz 1 , Rudolf Widmer‐Schnidrig 2 , Paul Davis 3 , Philippe Lognonné 4 , Baptiste Pinot 5 , Raphaël F. Garcia 5 , Kenneth Hurst 6 , Laurent Pou 7 , Francis Nimmo 7 , Salma Barkaoui 4 , Sébastien de Raucourt 4 , Brigitte Knapmeyer‐Endrun 8 , Martin Knapmeyer 9 , Guénolé Orhand‐Mainsant 5 , Nicolas Compaire 5 , Arthur Cuvier 10 , Éric Beucler 10 , Mickaël Bonnin 10 , Rakshit Joshi 1 , Grégory Sainton 4 , Eléonore Stutzmann 4 , Martin Schimmel 11 , Anna Horleston 12 , Maren Böse 13 , Savas Ceylan 14 , John Clinton 13 , Martin van Driel 14 , Taichi Kawamura 4 , Amir Khan 14, 15 , Simon C. Stähler 14 , Domenico Giardini 14 , Constantinos Charalambous 16 , Alexander E. Stott 16 , William T. Pike 16 , Ulrich R. Christensen 1 , W. Bruce Banerdt 6
Affiliation  

The instrument package SEIS (Seismic Experiment for Internal Structure) with the three very broadband and three short‐period seismic sensors is installed on the surface on Mars as part of NASA's InSight Discovery mission. When compared to terrestrial installations, SEIS is deployed in a very harsh wind and temperature environment that leads to inevitable degradation of the quality of the recorded data. One ubiquitous artifact in the raw data is an abundance of transient one‐sided pulses often accompanied by high‐frequency spikes. These pulses, which we term “glitches”, can be modeled as the response of the instrument to a step in acceleration, while the spikes can be modeled as the response to a simultaneous step in displacement. We attribute the glitches primarily to SEIS‐internal stress relaxations caused by the large temperature variations to which the instrument is exposed during a Martian day. Only a small fraction of glitches correspond to a motion of the SEIS package as a whole caused by minuscule tilts of either the instrument or the ground. In this study, we focus on the analysis of the glitch+spike phenomenon and present how these signals can be automatically detected and removed from SEIS's raw data. As glitches affect many standard seismological analysis methods such as receiver functions, spectral decomposition and source inversions, we anticipate that studies of the Martian seismicity as well as studies of Mars' internal structure should benefit from deglitched seismic data.

中文翻译:

从火星的InSight地震数据中检测,分析和消除毛刺

作为NASA InSight Discovery任务的一部分,在火星表面安装了带有三个超宽带和三个短周期地震传感器的SEIS(内部结构地震实验)套件。与地面安装相比,SEIS部署在非常恶劣的风和温度环境中,导致不可避免地降低了记录数据的质量。原始数据中普遍存在的一种伪像是大量的瞬态单边脉冲,通常伴随着高频尖峰。这些脉冲(我们称为“毛刺”)可以建模为仪器对加速度阶跃的响应,而尖峰可以建模为对位移同时阶跃的响应。我们将故障主要归因于火星期间仪器暴露于较大的温度变化而引起的SEIS内部应力松弛。整体而言,只有一小部分毛刺对应于SEIS包装的运动,这是由仪器或地面的微小倾斜引起的。在这项研究中,我们重点分析毛刺+尖峰现象,并介绍如何自动检测这些信号并将其从SEIS的原始数据中删除。由于故障影响许多标准地震学分析方法,例如接收器功能,频谱分解和震源反演,我们预计对火星地震活动的研究以及对火星内部结构的研究应受益于去毛刺的地震数据。整体而言,只有一小部分毛刺对应于SEIS包装的运动,这是由仪器或地面的微小倾斜引起的。在这项研究中,我们重点分析毛刺+尖峰现象,并介绍如何自动检测这些信号并将其从SEIS的原始数据中删除。由于故障影响许多标准地震学分析方法,例如接收器功能,频谱分解和震源反演,我们预计对火星地震活动的研究以及对火星内部结构的研究应受益于去毛刺的地震数据。整体而言,只有一小部分毛刺对应于SEIS包装的运动,这是由仪器或地面的微小倾斜引起的。在这项研究中,我们重点分析毛刺+尖峰现象,并介绍如何自动检测这些信号并将其从SEIS的原始数据中删除。由于故障影响许多标准地震学分析方法,例如接收器功能,频谱分解和震源反演,我们预计对火星地震活动的研究以及对火星内部结构的研究应受益于去毛刺的地震数据。我们重点分析毛刺+尖峰现象,并介绍如何自动检测这些信号并将其从SEIS的原始数据中删除。由于故障影响许多标准地震学分析方法,例如接收器功能,频谱分解和震源反演,我们预计对火星地震活动的研究以及对火星内部结构的研究应受益于去毛刺的地震数据。我们重点分析毛刺+尖峰现象,并介绍如何自动检测这些信号并将其从SEIS的原始数据中删除。由于故障影响许多标准地震学分析方法,例如接收器功能,频谱分解和震源反演,我们预计对火星地震活动的研究以及对火星内部结构的研究应受益于去毛刺的地震数据。
更新日期:2020-11-02
down
wechat
bug