We present the results of experimental studies of the properties of the plasma-density disturbances created during heating of the ionospheric F 2 region by high-power HF radio waves radiated by the "Sura" heating facility (Radiophysical Research Institute, Nizhny Novgorod). These experiments are specific in that they were performed in a sunlit (daytime) ionosphere when the generation of ionospheric turbulence has specific features and the turbulence intensity level is low enough. The plasma-density disturbances induced by high-power HF radio emission were sounded by signals of the GPS satellites, the line of sight to which crossed different parts of the disturbed ionosphere region. Threshold powers of the excitation of artificial plasma-density variations as well as spatial, temporal, spectral, and energy characteristics of the generated disturbances are determined.

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This paper describes software and hardware solution that enables Global Navigation Satellite System (GNSS) data acquisition with ground based stations network. The solution relies on original data format and relational database management system. C++ library code and database schema SQL-structures are created automatically from Javads Receiver External Interface Specification (GREIS) with a C# application. This solution was used to create a real time ionosphere monitor service based on Feodorov Institute of Applied Geophysics ROSHYDROMET GNSS-receiver network.