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Satellite Clock Offset Prediction Using Robust Kalman Filtering Based on Quantum Entangled Clock Synchronization

Satellite clock offset prediction is a key technique in satellite navigation systems. The second\|order correlation function of the entangled photon pairs is investigated and a clock synchronization scheme is proposed based on the temporal correlation of the function. Furthermore, the effects of chromatic dispersion and attenuation factors in propagation are incorporated. The results indicate that the scheme can provide synchronization information and that its modeling error is 1 ns with an accuracy of 0.01 ns. The parameters in the clock offset model are estimated by Robust Kalman filtering, and the covariance is estimated by using total Hadamard variance along with the observed values provided by the synchronization scheme. The simulation indicates that the scheme can provide prediction accuracy equivalent to IGS ultra\|rapid products and that the initial value is close to IGS final products