TY JOUR TI Space weather: risk factors for Global Navigation Satellite Systems KW space weather KW GNSS KW GPS KW GLONASS KW solar flares KW magnetic storms KW scintillations KW PPP KW RTK JO Solnechno-Zemnaya Fizika AU Demyanov, V.V. AU Yasyukevich, Y.V. PY 2021 IS 7 PB INFRA-M Academic Publishing LLC.