I received the BSc (5 years) in telecommunication engineering in 1999, with the master degree thesis entitled: "Precise GPS positioning tools for UNIX computers". After a brief period as a junior engineer in the Satellite transmission dept. of Retevision (former ONO), I started my PhD studies in the Aerospace Science and Technology doctoral programme and obtained the PhD degree in 2004 with the thesis "Contributions to the 3D ionospheric imaging with GPS data". I continued exploring the sounding of the ionospheric electron density with GPS in the context of a 1-year post-doctoral fellowship in the University of Kyoto (Japan). In 2005 I enrolled the German Aerospace Center (DLR) as a scientific staff for the GNSS Technology and Navigation group. In this group I developed satellite payloads based on GPS, worked on performance assessment of spaceborne GPS receivers and made general research on GNSS data analysis. From January 2008 to June 2011 I worked in Starlab, in GNSS data processing for earth observation (in the context of several international projects). I was also involved in projects related to GNSS receiver development. Since August 2011, I am working as a Technologist in JPL in the Orbit and Radiometrics Group, researching on GPS data processing for navigation.