Clarification of navigation signal delays in the problem of time-frequency determination of GLONASS

The article describes solving a number of particular problems of estimating signal propagation delays between GLONASS spacecraft and ground stations in general task of prospective information technology development for improving GLONASS time-frequency support. The delays caused by the removal of the phase centers of the antennas of ground stations, as well as delays in the receiving and transmitting paths of on-board equipment during pseudo-query measurements are considered. The results of processing the range measurements accumulated during the experiments between spacecraft and stations, including estimates of the mentioned delays, are presented. The obtained estimates can be used in the implementation of a promising technology of GLONASS time-frequency support.