A continuous carrier phase time transfer method for eliminating satellite arc segment day boundary jumps

Abstract

The present application belongs to the technical field of GNSS high-precision time and frequency transfer, and discloses a continuous carrier phase time transfer method for eliminating satellite arc segment day boundary jump. The method is based on satellite products with overlapping day boundary epochs, and uses an adjusted high-order Lagrange interpolation method to accurately extract the adjacent product arc segment day boundary jump variable when the receiver observation epoch is the day boundary time, and uses the variable as a correction term of the ambiguity parameter to correct the error term that is different with the satellite, thereby eliminating the jump of the time comparison result at the day boundary caused by the discontinuity of the satellite product arc segment. Through the method, the adjacent satellite product arc segments are connected, the day boundary jump system error contained in the satellite product is absorbed into the ambiguity parameter, the receiver clock difference estimation and other estimator states are prevented from being polluted by the adjacent arc segment discontinuity of the satellite product, the cross-day continuous PPP carrier phase time transfer is realized, and the time comparison accuracy and the continuity of the time link are improved.

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