3 ms·
In Earth-based GNSS systems, it's for clock synchronization. You've got 4 unknowns (x,y,z,delta t) and 4 signals; if you only had 3 signals, you couldn't solve
by tonyarkles 12y ago
In Earth-based GNSS systems, it's for clock synchronization. You've got 4 unknowns (x,y,z,delta t) and 4 signals; if you only had 3 signals, you couldn't solve the system of equations.