I.V. Bezmenov FSUE “VNIIFTRI”, Mendeleevo, Moscow regionisaev@vniiftri.ru Al’manac of Modern Metrology № 1 (21) 2020, pages 83–100 In the article have been presented results on development of the algorithm and the program for calculation in ultra-rapid regime of ephemerides and time information (orbits and clocks correc-tions) for GLONASS and GPS satellites performed in the Main … Читать далее Orbit estimation of GLONASS and GPS navigation satellites in ultra-rapid regime in FSUE “VNIIFTRI”