GBAS Air-Ground Irrelevant Error Monitoring Method and its Application

Abstract:

In GBAS, multipath and RFI/noise are air-ground irrelevant errors, and they could not been removed by the pseudorange difference between the aircraft and ground station. In the paper, the relationship between the B value and air-ground irrelevant error is analyzed. Since the B values for all the ground receivers are not independent, an assistant value named C is employed. Combining the characteristics of the pseudorange corrections matrix, a new method on GBAS air-ground irrelevant error monitoring is proposed. However, the method could not distinguish between multipath and RFI. Fortunately, previous study has proposed a method for detecting RFI through integrity monitoring at a DGPS reference station. Assuming the serious multipath and RFI will not appear simultaneously, user could ascertain it is multipath or RFI causes the air-ground irrelevant errors to exceed the threshold. Simulation results validated the utility of the proposed monitor methods.

• Periodical: Advanced Materials Research (Volumes 718-720)
• Pages: 976-983
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.718-720.976
• Online since: July 2013
• Authors: Ji Si Fang, Yan Bo Zhu, Zhi Peng Wang
• Keywords: GBAS, Integrity Monitoring, Multipath, RFI

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