A Real-Time Prediction Algorithm of BDS Satellite Clock Offset Considering Phase Jumps

On the basis of BDS satellite clock Offset phase jump models, the paper analyses characteristics of phase jumps of satellite clocks on orbit, and deduces detection methods of phase jumps, and then builds the prediction models of BDS satellite clock offsets considering corrections of starting point bias and periodic terms, and lastly obtains a real-time prediction algorithm of BDS satellite clock offsets considering phase jumps. For BDS satellite clock offsets with phase jumps, numerical examples show that the real-time prediction precision of new algorithm is superior to the traditional algorithm. Through analyzing BDS satellite clock real-time prediction precision of 322 days, it shows that the average prediction precisions of 24 and 6 h are 7.9 and 2.3 ns respectively.