Inter-satellite Doppler shift is the main factor affecting the accuracy of laser frequency transmission. In order to provide more Doppler frequency shift data for ground validation system of navigation system. In this paper, the ephemeris of Beidou satellite navigation system is used to simulate the Doppler frequency shift between satellites. The effects of incomplete equal propagation paths on the Doppler shift of the inter-satellite bidirectional link are simulated. Simultaneously, the range and the frequency change rate of Doppler shift in Beidou satellite constellation are simulated.
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