Stability of systematic delays of code GNSS signals in receiving equipment
The consistency of the signal delay value in the receiving path of the GNSS equipment is crucial for the tasks of comparing time scales over the GNSS channel. It is currently assumed that after calibration the delays keep constant value within the limits 2 ns or less. It is also believed that for two GLONASS satellites emitting a signal at the same letter frequency, these delays are the same. The aim of the study is a quantitative evaluation of the instability of internal delays in receivers specially designed for time and frequency comparisons.