Seismic instruments: article

Аnnotation: The paper presents the results of the modernization of the satellite geodetic network of the geodynamic test area of the Nizhne-Kansky massif using rock geodetic centers in 2021–2022. A brief review of the historical experience of using rock centers in the development of satellite geodetic networks at geodynamic sites, in particular, in areas where underground research laboratories are located, is given. On the base of the presented experience, the design and technology of installing rocky geodetic centers were developed and implemented. The design of the rock centers allows minimizing the centering error and ensuring the immobility of the GNSS equipment through-out the entire measurement session. The results of the expansion of the geodetic network in connection with the start of the construction of an underground research laboratory in the Krasnoyarsk Territory are presented. The form of finite elements of the modernized geodetic network is analyzed. It is shown that the construction of new GNSS stations had a positive effect on the network geometry. As a result, the network has increased the number of close to equilateral triangles (finite elements), which will have a positive effect on the accuracy of calculations of the deformations of the Earth's surface when processing the results of geodetic measurements. This will increase the accuracy of calculations of deformations of the Earth's surface when forecasting the long-term stability of the geological environment in the study area.