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- W2390348512 abstract "An adaptive autonomous navigation method for high earth orbit spacecraft is proposed by using four constellation systems to overcome the shortcomings of low visibility, liability and usability of single mode or dual-mode positioning systems. Firstly, based on the analysis of visibility and compatibility of constellation satellites, the satellite selection is realized by utilizing weighted geometric dilution of precision(WGDOP) algorithm. Secondly, considering the fact that there exists a non-synchronization phenomenon in the constellation systems, the synchronization error of each constellation system is estimated in real time as state variables of the navigation system with constellation/INS tightly coupled integration, which achieves soft synchronization. Thirdly, the measurement noise variance matrix of the designed filter is adjusted adaptively to solve the problem of weakness of the received satellites signal and the strong uncertainty of the measurement noise of the high orbit spacecraft. Finally, simulation results are provided, which illustrate that compared with extended Kalman filter(EKF), the navigation accuracy can be enhanced by 50% using the proposed adaptive filtering algorithm when there exists strong uncertainty in the measurement noise and unable to set up the precise model of measurement error." @default.
- W2390348512 created "2016-06-24" @default.
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- W2390348512 date "2013-01-01" @default.
- W2390348512 modified "2023-09-24" @default.
- W2390348512 title "Adaptive autonomous navigation method of high Earth-orbit spacecraft based on multi-constellation information" @default.
- W2390348512 hasPublicationYear "2013" @default.
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