«Potok» – distributed platform for modeling digital twins of the GLONASS

The GLONASS global navigation satellite system (GNSS) is currently at the stage of modernisation. In order to consider and select the best option for the development of the system, it is necessary to create a modelling tool that can ensure the correct reproduction and interaction of diverse and different in its structure modernised elements and interrelationships between them. The main purpose of the work is to outline the structure and basic principles of the functioning of this tool. The implementation of these principles is carried out in the open platform “Potok”, developed on the initiative of the National Research University “MPEI”, which allows to configure digital twins of the GLONASS system and to model the system as a whole to solve a wide range of problems. In the article the principles laid down in the platform are considered and justified. The scheme of the platform organisation, technical implementation of the platform, as well as fundamental requirements to the computer models used in the platform are stated. The organisational basis of the platform is the interaction of the expert council with the community of developers. The technical implementation of the platform consists of a distributed computing network, a repository of computer models, as well as a node for modelling session management. To describe the diverse and heterogeneous elements of the GLONASS system, the concept of an ideal discrete scale of modelling time is used. All elements of the GLONASS system are described in the form of difference equations describing the evolution of the state of the elements in time.