graduated from the Ecole Polytechnique France. She currently works as navigation algorithms engineer at Thales Alenia Space on the EGNOS project, more precisely on precise orbit determination. Rabab Lembachar graduated from ENSEEIHT, France. She is a software engineer in the EGNOS Navigation Algorithms team at Thales Alenia Space, currently working on designing and conceiving an Orbit Determination software. Thierry Authié graduated from the Institut National des Sciences Appliquées (INSA), France. He worked in space flight dynamics and precise orbit determination. He currently works as navigation algorithms engineer at Thales Alenia Space on the EGNOS project. Sébastien Trilles is a specialist in navigation performances, working at Thales Alenia Space on the EGNOS Project as Algorithm Navigation Design Authority. He has been in charge of Algorithm studies with the CNES on Precise Orbit Determination and Time System Reference for EGNOS. Flavien Mercier is senior expert in the orbit determination team at CNES. He works on the precise orbit determination for altimetry satellites (TOPEX, JASON) since 2001, he is specialist in GPS processing. He is also involved in validations for the EGNOS team. Since 2010, he is participating to the CNES/CLS analysis centre for IGS ('grg' products).

His main topics of research are the stochastic algorithms and more recently the sensitivity analysis of large systems.

is a specialized engineer in the field space flight dynamics, precise orbit determination and navigation. He received his M.S. degree in Applied Mathematics from the INSA, Toulouse (France) in 2004. He currently works on SBAS and navigation algorithm at Thales Alenia Space.

No abstract

No abstract