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Enhancing BeiDou/GNSS integrity with minmax optimization.

Jingsong Qiu1,2, Ci Chen1,3, Siyu Lei1,4

  • 1School of Automation, Guangdong University of Technology, Guangzhou 510006, China.

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Summary
This summary is machine-generated.

This study introduces Optimal-ARAIM, a new integrity monitoring strategy for BeiDou/GNSS navigation. It significantly reduces the vertical protection level (VPL), enhancing navigation safety and reliability.

Keywords:
ARAIMGNSSmaximum monitoring orderminmax optimizationvertical protection level

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Area of Science:

  • Satellite Navigation Systems
  • Navigation Integrity Monitoring
  • Aerospace Engineering

Background:

  • Integrity is critical for navigation system availability, impacting transportation, security, and surveillance.
  • Existing integrity monitoring strategies face challenges with complex fault scenarios in BeiDou/Global Navigation Satellite Systems (GNSS).

Purpose of the Study:

  • To propose and evaluate a novel integrity monitoring strategy, Optimal-ARAIM, for optimizing the vertical protection level (VPL) in BeiDou/GNSS.
  • To enhance the robustness and reliability of navigation operations through improved integrity monitoring.

Main Methods:

  • Optimal-ARAIM utilizes a minimax estimator to minimize VPL by adjusting the full-set solution and allocating integrity/continuity risks.
  • A maximum monitoring order mechanism mitigates combinatorial explosion from satellite faults, formulating scenarios as a convex optimization problem.
  • Performance is evaluated using BeiDou observation and almanac data, and global GNSS almanac data.

Main Results:

  • The average VPL was consistently below 8 meters across five Asian stations using observation data.
  • Predicted VPL distributions using BeiDou almanac data were predominantly below 10 meters.
  • Global availability coverage exceeded 93%, meeting the CAT-I standard.

Conclusions:

  • Optimal-ARAIM effectively reduces VPL for BeiDou/GNSS, ensuring robust and reliable navigation.
  • The proposed strategy enhances navigation safety for critical applications like transportation and surveillance.
  • The method demonstrates high global availability, meeting stringent international standards.