Dr Juliette Marais is a researcher at the University of Gustave Eiffel (formerly IFSTTAR). She is currently involved in analyzing and enhancing the performance of GNSS in land transport environments, particularly in rail applications. Since 2000, she has participated in European railway-related projects, such as the recent H2020 RAILGAP project, and the ongoing VICE4RAIL project. Her research focuses on developing fail-safe positioning solutions for land transport applications and characterizing GNSS propagation in railway environments (NLOS, multipath, and interferences).