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2 results

  • Millisecond pulsars as standards: Timing, positioning and communication

  • Clément Vidal
  • Journal:
    Proceedings of the International Astronomical Union / Volume 13 / Issue S337 / September 2017
    Published online by Cambridge University Press:
    04 June 2018, pp. 418-419
    Print publication:
    September 2017
    • Article
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  • Millisecond pulsars (MSPs) have a great potential to set standards in timekeeping, positioning and metadata communication.

  • XNAV/CNS Integrated Navigation Based on Improved Kinematic and Static Filter

  • Yidi Wang, Wei Zheng, Xueyin An, Shouming Sun, Li Li
  • Journal:
    The Journal of Navigation / Volume 66 / Issue 6 / November 2013
    Published online by Cambridge University Press:
    21 June 2013, pp. 899-918
    Print publication:
    November 2013

  • In order to enhance the independent viability of high-orbit satellites, an X-ray pulsar-based navigation (XNAV)/celestial navigation system (CNS) integrated navigation method is proposed. An improved kinematic and static filter is derived to fulfil data fusion that can obtain an optimal estimation for global use. In the filter, unscented transformation is used to reduce linearization error, and the technique of separate-bias is used to reduce the impacts of systematic errors in XNAV measurements. The results of simulations have shown that the proposed navigation system can reach a positioning accuracy of less than 100 m, an improved performance over separate XNAV and CNS.