On the Sagnac effect in wave propagation

According to the classical propagation model, the Sagnac effect is due to t he movement of receiver during wave propagation. Based on this, we derive t he GPS (global positioning system) Sagnac pseudorange correction, the Sagna c effect in interferometry, and the Doppler frequency shift. Then, we exami ne these formulas with the propagation experiments associated with the Sagn ac effect, particularly the reference frame of the receiver velocity and th e influences of earth's rotational and orbital motions. Thereby, it is foun d that the propagation of electromagnetic wave in these experiments is in a ccord with the classical model with the propagation frame being stationary in an ECI (earth-centered inertial) frame.