GNSSGET and GNSSPLOT Platforms - Matlab GUIs for Retrieving GNSS Products and Visualizing GNSS Solutions

The emergence of new satellite systems such as Galileo and BeiDou, as well as the modernization of GPS and GLONASS, indicate dramatic changes in the field of satellite positioning. IGS initiated the MGEX (Multi-GNSS Experiment) campaign to overcome the challenges that scientific community has to face due to the arrival of new satellite systems. The variety of products improves and enhances the solution provided by multi-GNSS techniques. However, these heterogeneous products are provided by various Data Centers (DC) and Analysis Centers (AC) in many different locations. Users are therefore required to acquire their data across multiple FTP Servers, a rather cumbersome and time consuming task. The aim of the work described in this paper is to create a platform for the acquisition of GNSS data from heterogeneous sources, for performing high accuracy position solutions and building data visualizations concerning positioning error and solution accuracy. All of these tasks are essential for the purpose of making complex GNSS data more accessible, understandable and useful for precise point positioning, atmospheric research and other