Loran-C timing terminal channel time delay calibration system and method

The invention provides a Loran-C timing terminal channel time delay calibration system and method, and the method comprises the steps: firstly measuring the time delay T0 between a reference Loran-C signal output by a Loran-C timing signal simulator and a reference 1PPS signal, and completing the calibration of the simulator; secondly, the time delay T1 of the signal transmitting device is measured, and calibration of the transmitting device is completed; the receiver to be tested is connected into the system to measure the time difference T2 between the reference 1PPS output by the Loran-C time service signal simulator and the 1PPS signal output by the Loran-C timing terminal to be tested; and finally obtaining the channel time delay delta T of the Loran-C timing terminal to be tested, wherein delta T = T2-T1-T0. According to the invention, an extra standard Loran-C timing terminal is not needed as a reference, the uncertainty of time delay measurement of a relative time delay calibration method is reduced,