Home > Seminars
Seminars
Next Seminar
Wednesday 3 March
Chaos in navigation satellites
Jérôme Daquin,Jerome Daquin, University of Namur, Dpt of Mathematics
The threat raised by space debris has vivified longterm studies of terrestrial
orbits. To apprehend the motion on long time scales, the Astrodynamics
community has translated, deployed and adapted many tools coming from
Dynamical System theory and Celestial Mechanics. During this seminar, I will
review and discuss some aspects of the longterm dynamics of terrestrial
orbits, especially in the range of medium altitude. In particular, I’ll reveal
a manifold structure in a 3 degreesoffreedom Hamiltonian system physically
representative of the dynamics of navigation satellites. Longtime properties
of the system are explained in terms of the possible normally hyperbolic
manifold structure and the associated stable and unstable manifolds regulating
transport properties. Those transport properties could be appealing for end
oflife strategies based on manifolds dynamics.
Seminars to come

Wednesday 3 March, 15h30 – 17h00
Séminaires passés de Dynamique Quantique et Classique
Andrea Armaroli 
Wednesday 17 March, 14h00 – 15h00
Mean field models for fluctuation driven population dynamics
Matteo di Volo (LPTM, Université de CergyPontoise) 


Wednesday 31 March, 14h00 – 15h00
Dynamiques sauvages holomorphes
Sébastien Sbiebler (IMJPRG, Sorbonne Université)