[S19-4] Science goals and modeling of the Insight/SEIS experiment

[S19-4-01] SEIS/INSIGHT: One year prior the Seismic Discovery of Mars

^○Philippe Lognonne^{1, 2}, William. B. Banerdt³, Domenico Giardini⁴, William Tom Pike⁵, Sebastien De Raucourt^1,2, Jeff Umland³, Ken Hurst³, Peter Zweifel⁴, Simon Calcut⁶, Marco Bierwirth⁷, David Mimoun⁸, Gabriel Pont⁹, Nicolas Verdier⁹, Tom Hofmann³, Don Banfield¹⁰, John Clinton⁴, Veronique Dehant¹¹, Matt Golombek³, Raphael Garcia⁸, Catherine Johnson¹², SEIS Team¹³ (1.Institut de Physique du Globe de Paris-Sorbonne Paris Cite, Paris, France, 2.Universite Paris Diderot, Paris, France, 3.Jet Propulsion Laboratory, Pasadena, USA, 4.ETHZ, Zurich, Switzerland, 5.Imperial College, London, United Kingdom, 6.Oxford University, Oxford, United Kingdom, 7.MPS, Gottingen, Germany, 8.ISAE, Toulouse, France, 9.CNES, Toulouse, France, 10.Cornell University, Ithaca, USA, 11. ROB, Bruxelle, Belgium, 12. UBC, Vancouver, Canada, 13. ( http://www.seis-insight.eu))

InSight is the next NASA Discovery mission planned for launch in 5/2018 for landing end of 11/2018. The payload is a complete geophysical observatory, with a seismometer (SEIS), heat flux (HP3) and geodesy (RISE) experiments, a magnetometer (US) and the APSS suite of atmospheric sensors measuring wind (TWINS, Spain), atmospheric temperature and pressure (US). SEIS is the primary instrument of the mission with a 3-axis very-broad-band (VBB, F) and a 3-axis short period (SP, UK) instruments mounted on a Leveling system (LVL, D) protected by a Wind and Thermal Shield (WTS, US) and connected by a Tether (US). The 3 axis VBBs are enclosed in a vacuum thermal enclosure (EC). A leak detected in the EC during the final integration forced postponement of the launch from 2016 to 2018 and redesign of a new EC by JPL.
SEIS will provide the very first seismic records of Mars. Science goals implementation is very challenging due to the complete lack of information on the deep seismic interior structure of Mars, as well as seismic activity and surface seismic noise. In parallel to the hardware technical developments made by the hardware team, efforts of the SEIS science team were concentrated in three areas, associated with single-station seismic analysis methodology, pre-launch estimation of the seismic and station-generated noise and amplitude of seismic and gravity signals generated not only by quakes but also by other non-seismic sources (e.g. impacts, seismic waves generated by the atmosphere, or the Phobos tide).
We present the status of SEIS as well as the performances of the seismic payload, following its characterization in the 2017 Flight Model delivery activities. We summarize and review the most recent analysis made by the SEIS team predicting the seismic performances of the SEIS experiment in the Martian environment, including decorrelations performed by the APSS sensors, as well as estimates of seismic signals, decorrelated noise and structure inversion.