Scholz, John-Robert, Widmer-Schnidrig, Rudolf ORCID: 0000-0001-9698-2739, Davis, Paul, Lognonne, Philippe ORCID: 0000-0002-1014-920X, Pinot, Baptiste, Garcia, Raphael F., Hurst, Kenneth, Pou, Laurent, Nimmo, Francis, Barkaoui, Salma, De Raucourt, Sebastien, Knapmeyer-Endrun, Brigitte, Knapmeyer, Martin, Orhand-Mainsant, Guenole, Compaire, Nicolas, Cuvier, Arthur, Beucler, Eric, Bonnin, Mickael, Joshi, Rakshit, Sainton, Gregory, Stutzmann, Eleonore, Schimmel, Martin ORCID: 0000-0003-2601-4462, Horleston, Anna, Bose, Maren, Ceylan, Savas ORCID: 0000-0002-6552-6850, Clinton, John, Van Driel, Martin, Kawamura, Taichi, Khan, Amir, Stahler, Simon C., Giardini, Domenico, Charalambous, Constantinos, Stott, Alexander E., Pike, William T., Christensen, Ulrich R. and Banerdt, W. Bruce (2020). Detection, Analysis, and Removal of Glitches From InSight's Seismic Data From Mars. Earth Space Sci., 7 (11). WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 2333-5084

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Abstract

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. Plain Language Summary The instrument package SEIS (Seismic Experiment for Internal Structure) with two fully equipped seismometers is installed on the surface of Mars as part of NASA's InSight Discovery mission. When compared to terrestrial installations, SEIS is more exposed to wind and daily temperature changes that leads to inevitable degradation of the quality of the recorded data. One consequence is the occurrence of a specific type of transient noise that we term glitch. Glitches show up in the recorded data as one-sided pulses and have strong implications for the typical seismic data analysis. Glitches can be understood as step-like changes in the acceleration sensed by the seismometers. We attribute them 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 whole SEIS instrument. In this study, we focus on the detection and removal of glitches and anticipate that studies of the Martian seismicity as well as studies of Mars's internal structure should benefit from deglitched seismic data.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Scholz, John-RobertUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Widmer-Schnidrig, RudolfUNSPECIFIEDorcid.org/0000-0001-9698-2739UNSPECIFIED
Davis, PaulUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lognonne, PhilippeUNSPECIFIEDorcid.org/0000-0002-1014-920XUNSPECIFIED
Pinot, BaptisteUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Garcia, Raphael F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hurst, KennethUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pou, LaurentUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nimmo, FrancisUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barkaoui, SalmaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
De Raucourt, SebastienUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knapmeyer-Endrun, BrigitteUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knapmeyer, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Orhand-Mainsant, GuenoleUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Compaire, NicolasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Cuvier, ArthurUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beucler, EricUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bonnin, MickaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Joshi, RakshitUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sainton, GregoryUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stutzmann, EleonoreUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schimmel, MartinUNSPECIFIEDorcid.org/0000-0003-2601-4462UNSPECIFIED
Horleston, AnnaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bose, MarenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ceylan, SavasUNSPECIFIEDorcid.org/0000-0002-6552-6850UNSPECIFIED
Clinton, JohnUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Van Driel, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kawamura, TaichiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Khan, AmirUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stahler, Simon C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giardini, DomenicoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Charalambous, ConstantinosUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stott, Alexander E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pike, William T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Christensen, Ulrich R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Banerdt, W. BruceUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-312823
DOI: 10.1029/2020EA001317
Journal or Publication Title: Earth Space Sci.
Volume: 7
Number: 11
Date: 2020
Publisher: AMER GEOPHYSICAL UNION
Place of Publication: WASHINGTON
ISSN: 2333-5084
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
RECORDSMultiple languages
Astronomy & Astrophysics; Geosciences, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/31282

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