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Chen Sun

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Proceedings Article | 6 July 2015 Paper

Method and simulation for spacecraft clock correction based on x-ray pulsars signal

Xianzhou Gui, Chen Sun, Senlin Huang

Proceedings Volume 9631, 96312A (2015) https://doi.org/10.1117/12.2197156

KEYWORDS: Space operations, X-rays, Clocks, Signal processing, Sensors, Signal detection, Electronic filtering, Simulink, Device simulation, Satellites

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X-ray pulsar-based spacecraft navigation comes to be a new kind of autonomous navigation technology with high potential, for the advantages of high reliability, good autonomy, high precision and wide applicability. Timing, determination of position and attitude are main prospects of using X-ray pulsars [1,2]. To realize the pulse signal timing, in this paper, a Phase-Locked Loop circuit for tracking pulsar signal frequency is designed; PLL is built in the Simulink environment and tested by using simple pulse signal to get circuit parameters with good track effect. The Crab Nebula pulse profile, which is used as the simulation signal source, is modelled by using the mathematical method [3]. The simulation results show that the PLL circuit designed in the paper can track the frequency of pulse signal precisely and can be used for spacecraft clock correction.

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