X-ray pulsar-based navigation method is a promising autonomous navigation method. The research has been done for nearly 30 years. Several key techniques about this method are the research hotspots now. One of the key techniques is estimation of the time of arrival (TOA) in pulsar's signal processing. The precision of the TOA would affect the precision of X-ray pulsar-based navigation. Using Monte Carlo method, we analyze the impact of the precision of TOA by some parameters. The Results show that the earth ephemerid errors would affect the precision of TOA in the single estimation. About the pulsar's characteristic parameters, pulsar position and its rotation period are the main factors that affect the precision of TOA. In order to keep the precision, the time delay of the detector should be calibrated and the background noise should be restrained. Results of the paper could make contribution to the precision analysis of the X-ray pulsar-based navigation.
Analysis on time of arrival precision in X-ray pulsar-based navigation
2017-07-01
593920 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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