TY CONF TI Integer phase ambiguity resolution method for absolute GLONASS observations KW GNSS KW GLONASS KW phase ambiguity KW PPP KW MLAMBDA JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Starikov, K.. AU Petrov, S.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences