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

[S19-4-05] Planned Products of the Mars Structure Service for the InSight Mission to Mars

Mark P. Panning¹, ^○Melanie Drilleau², Philippe Lognonne¹, W. Bruce Banerdt³, Raphael Garcia⁴, Matthew Golombek³, Sharon Kedar³, Brigitte Knapmeyer-Endrun⁵, Antoine Mocquet⁶, Nick A. Teanby⁷, Jeroen Tromp⁸, Renee Weber⁹, Eric Beucler⁶, Jean-Francois Blanchette-Guertin¹, Ebru Bozdag¹⁰, Tamara Gudkova^11,12, Stefanie Hempel⁴, Amir Khan¹³, Vedran Lekic¹⁴, Naomi Murdoch⁴, The Mars Structure Service Team¹⁵ (1.University of Florida, Gainesville, US, 2.Institut de Physique du Globe de Paris, Paris, France, 3.Jet Propulsion Laboratory, Pasadena, US, 4.Institut Superieur de l'Aeronautique et de l'Espace, Toulouse, France, 5.Max Planck Institute for Solar System Research, Gottingen, Germany, 6.Laboratoire de Planetologie et de Geodynamique de Nantes, Nantes, France, 7.School of Earth Sciences, Bristol, UK, 8.Princeton University, Princeton, US, 9.NASA Marshall Space Flight Center, Huntsville, US, 10.Geoazur, Nice, France, 11. Schmidt Institute of Physics of the Earth, Moscow, Russia, 12. Moscow Institute of Physics and Technology, 13. ETH Zurich, Zurich, Switzerland, 14. University of Maryland, College Park, US, 15. seis-insight.eu)

The InSight lander will deliver geophysical instruments to Mars in 2018, including collocated short-period and very broad-band seismometers installed directly on the surface (Seismic Experiment for Interior Structure, SEIS). Here we present the output and inversion results we expect from this mission. Routine operations will be split into two services, the Mars Structure Service (MSS) and Marsquake Service (MQS), which will be responsible, respectively, for defining the structure models and seismicity catalogs from the mission. The MSS will deliver a series of products before the landing, during the operations, and finally to the Planetary Data System (PDS) archive. Prior to the mission, we assembled a suite of a priori models of Mars, based on estimates of bulk composition and thermal profiles. Initial models during the mission will rely on modeling surface waves and impact-generated body waves independent of prior knowledge of structure. Later modeling will include simultaneous inversion of seismic observations for source and structural parameters. We use Bayesian inversion techniques to obtain robust probability distribution functions of interior structure parameters. Shallow structure will be characterized using the hammering of the heat flow probe mole, as well as measurements of surface wave ellipticity. Crustal scale structure will be constrained by measurements of receiver function and broadband Rayleigh wave ellipticity measurements. Core interacting body wave phases should be observable above modeled martian noise levels, allowing us to constrain deep structure. Normal modes of Mars should also be observable and can be used to estimate the globally averaged 1D structure, while combination with results from the InSight radio science mission and orbital observations will allow for constraint of deeper structure.