Bezsonov E. Improvement of network methods of estimation and accounting of ionospheric and tropospheric delays of GNSS-signals in the tasks of precision positioning

The object is processing of the code and phase GNSS observations. The goal is improvement, research and experimental testing methods, algorithms and procedures for assessment and accounting of ionospheric and tropospheric delays to achieve centimeter accuracy positioning with using phase observations of GNSS stations. The methods is the theory of satellite navigation systems, the statistical theory of radio systems, the methods of mathematical modeling. The results is at the first time proposed method and algorithms for assessment and management of ionospheric delay by using the unambiguous phase GNSS observations; the method of zenith tropospheric delays estimation, which allows to determine the tropospheric delays with centimetric accuracy at baseline distances of up to 200 km is improved. Scope is the precise positioning and navigation