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Research on Measurement Time-Delay Compensation on X-Ray Pulsar-Based Navigation

CHU Yong-hui1,2,WANG Da-yi1,2,XIONG Kai1,2,HUANG Xiang-yu1,2(1.Beijing Institute of Control Engineering,Beijing 100190,China; 2.Science and Technology on Space Intelligent Control Laboratory,Beijing 100190,China)  
The X-ray pulsar photon is original measurements on X-ray pulsar-based navigation.Time delay exists in the process of assembling all the measured photon events into a pulse profile.Based on the analysis of photon fold principle,the approach is analyzed for time-delay compensation through the use of photon time-delayed TOA.Two methods are proposed for compensation on time-delayed measurement.The first method based on orbit propagate is fit for a short delay time case,and the second method based on integrated navigation is fit for whatever the delay time is.Finally,the schedule is validated by using numeric simulation.
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