TY JOUR TI Research on the development issues of coordinate support KW space geodetic complex KW coordinate support KW geocentric reference system KW GNSS KW IERS KW GENESIS KW GGOS KW GGRF KW ITRF KW ITRS JO Izvestia Vuzov. Geodesy and Aerophotosurveying AU Gusev, I.V. AU Golubitskiy, A.M. AU Nepoklonov, V.B. PY 2025 IS 69 PB MIIGAiK