GNSS双频导航信号用户完好性监测机制研究

Abstract

Abstract:

User integrity denotes the measure of the trust the user has in the navigation information. However when a single system navigation signal is available, the aviation users will have poor integrity and low availability. Therefore, integrity monitoring mechanisms are developed which are based on the protection levels and use multi-systems and dual-frequency navigation signals. In order to validate user integrity under fault-free and faulty assumptions, a pseudo-range error estimation, the protection level equations under different assumptions and the fixable integrity risk allocation are studied in detail. The results of the navigation performance simulation show that: the combined observation can effectively reduce the user protection level and improve the availability. In most regions of the world the availability exceeds 95% when it is used for Category I precision approach and landing.

Key words: global navigation satellite system, integrity monitor, protection level, integrity risk, integrity, availability

CLC Number:

V448
TN967.1

WU Weijia, WU Dewei, QI Junyi. Research on User Integrity Monitor Mechanism with GNSS Dual-frequency Navigation Signals[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(12): 2246-2252.

References

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Research on User Integrity Monitor Mechanism with GNSS Dual-frequency Navigation Signals

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