TY JOUR TI Calibration methodology of satellite altimeter using geoinformation monitoring KW gravitational field KW space geodetic system KW satellite altimeter KW external calibration KW sea surface height KW geoinformation monitoring JO Izvestia Vuzov. Geodesy and Aerophotosurveying AU Yakovlev, N.N. PY 2025 IS 69 PB MIIGAiK