HDR Defense


"Planetary geodesy: Application to the gravity of the Martian system and The formation of the Martian moons"

January 25th 2021 at 3:00 pm - LPG - Faculty of Sciences and Technology - University of Nantes

> Follow Pascal Rosenblatt's defense online via the link via le lien https://univ-nantes-fr.zoom.us/j/91882897156

phobos 2
Crédit image : Dreksler Astral


Présentation : "I will present two aspects of my research work performed over the last twenty years. The first aspect concerns the application of the space geodesy concepts and techniques to the reconstruction of the motion of deep space probes orbiting or flying by planets or moons. I will focus on orbiters around Mars, especially on the NASA’s Mars Global Surveyor and Mars Odyssey as well as on the ESA's Mars Express spacecraft. I will synthetise the precise orbit determination performed with the tracking data of these spacecraft and on the results in terms of the internal structure of Mars and its moons, Phobos and Deimos. The second aspect concerns the modeling of the formation of the Martian moons. It is an application of models of moons and planets formation to the formation of the Martian moon system. This is a pioneering effort, never done before, which has provided an outstanding contribution to our understanding of the formation of the two small satellites of Mars.

For each of the two aspects, I suggest paths of investigations for continuing this work in relation with the opportunities of space geodesy experiment offered by the missions of the solar system exploration launched, in preparation or yet to be selected for the ten years to come."

Members of the jury :
Mr Christophe Sotin, Professor JPL/NASA, president
Mrs Isabelle Panet, Research Director IPGP
Mr Alessandro Morbidelli, Research Director Observatoire de la Côte d'Azur
Mrs Marianne Greff, Professor IPGP
Mr Georges Balmino, Researcher Emeritus Observatoire Midi-Pyrénées
Mrs Doris Breuer, Professor DLR