Comparison of models of tropospheric delay of satellite navigation radio signals in terms of positioning accuracy

In this paper, a comparative analysis of models for determining the magnitude of the tropospheric delay of satellite navigation radio signals by the accuracy of positioning by an autonomous method with high accuracy (PPP) is carried out. In this case, the tropospheric corrections calculated by one of the methods are used to compensate for the user’s location error. The following models of tropospheric delay of radio signals are considered: Saastamoinen model, GCAT model, Hopfield model.