PhD Thesis Offers
Open PhD Thesis Offers for InSight in France
The SEIS project is offering several PhD in the participating teams. All PhD will start in September 2020. For more information, please contact the PhD supervisors and/or follow the guidelines in the PhD description below.
Using the Mars background SEIS seismic noise for inverting landing site, crust and upper mantle seismic structure (CNES/STEP Paris University)
The structure of the SEIS noise is not well understood. The first goal of the PhD will be to separate, by using both the SEIS and APSS data, the lander noise from the planet background seismic noise. This will request to process the complete collection of continuous data, as functions of wind direction and local time, in order to separate noise related to local origin from noise related to global or regional origin. This process will not be key for searching for micro-seismic noise, but also for improving the signal to noise ratio of all detected events, which will allow significant contribution to ongoing structural analysis made with the recorded quakes. The second goal of this project will be to couple observations, analysis and modeling of the SEIS data together with observation, analysis and modeling of the APSS (Banfield et al., 2019) data in order to constrain and model the source any observed micro-seismic and acoustic noise. The last goal of the PhD will be to constrain, with these seismic waves generated by the atmosphere, the subsurface and possibly the crustal and lithospheric structure of the planet, independently of quakes and impacts.
Gravimetry and stresses of Mars and its Moons (ISAE-SUPAERO/Lagrange).
The goal of this Phesis is to develop the tools allowing the modeling of the gravity fields and internal stresses of Mars, of the Martian Moon and of the small bodies of the solar systems. This will be done in the frame of the data analysis of the InSight and MMX mission, but also to support other missions like HERA and PSYCHE. Validation will be made with the data from NEAR, HAYABUSA, HAYABUSA-2 et OSIRIS-REX.
Thermal evolution, Crustal structure and Seismicity of Mars
The InSight geophysical station landed on Mars on November 26, 2018. Its mechanical arm settled the seismometer SEIS on the Martian surface shortly after, and since then, SEIS is recording, for the first time, the seismological activity of Mars, with many events detected during the first year of operation. Unlike on Earth, plate tectonics does not exist on Mars, whose internal dynamics is characterized by a stagnant lithosphere at the surface. The Martian seismic activity mainly comes from the slow cooling of this immobile lid. Thus, the seismicity is closely related to the thermal evolution of the planet. This PhD thesis aims at characterizing the crustal and lithosphere structure of Mars, their thermal and mechanical state and their lateral variations, in order to better understand the Martian seismicity, by combining physical studies on the crust structure with mantle thermal evolution models. This thesis will be co-supervised by Chloé Michaut (ENS Lyon) and Mark Wieczorek (OCA, Nice) and in interaction with Daniele Antonangeli (IMPMC, Paris).