The Quick Search Algorithm of Pulsar Period Based on Unevenly Spaced Timing Data

Using the timing information of pulsar signal for autonomous navigation of spacecraft in deep space has the vital significance, the accurate timing model (period and period derivation) is the foundation of achieving high precision auto-navigation solution. Both \( \chi^{2} \) assessment method and Lomb algorithm are analyzed, the idea is brought forward that the initial value of pulsar period is gained using the \( \chi^{2} \) assessment method, then the result of period is refined by Lomb algorithm. Meanwhile, the Lomb algorithm is ameliorated using by the idea of FFT algorithm, the efficiency of operation is advanced highly. Finally the exact pulsar period is estimated and correct pulse profile is replicated using the algorithms and the measured timing data from the X-ray source simulated system.