A Dynamic Constellation Selection Method for Advanced Receiver Autonomous Integrity Monitoring

Abstract

The invention discloses a constellation dynamic selection method for autonomous integrity monitoring of advanced receivers, which belongs to the field of satellite navigation technology. ARAIM is a receiver-side fault diagnosis and integrity monitoring technology based on multi-constellation satellite navigation systems. It is aimed at different satellite navigation systems. The difference in the geometric configuration of the system space constellation will lead to the increase of the location difference of the fault subset, which will directly lead to the problem that the global availability of ARAIM is reduced. A dynamic selection method of the constellation is proposed. The geometric configurations of different constellations are evaluated and sorted, and the two systems with the best space constellations are selected for positioning calculation and integrity monitoring. The method can effectively reduce the influence of different system space configuration differences on the availability of ARAIM, improve the availability of ARAIM, reduce computational complexity, and improve the computational efficiency of integrity monitoring. This method is suitable for autonomous integrity monitoring applications of satellite navigation receivers, and the same idea is applicable to fault diagnosis and integrity monitoring of other signal systems.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation, and in particular relates to a constellation dynamic selection method for autonomous integrity monitoring of advanced receivers. Background technique [0002] Receiver Autonomous Integrity Monitoring (RAIM) is a method for satellite navigation receivers to independently diagnose and eliminate faults based on redundant GNSS information. The RAIM algorithm is included in the receiver, so it is called autonomous monitoring. RAIM is also the most direct, most timely, most widely used, most deeply researched, and most computationally efficient integrity monitoring method. RAIM technology only supports lateral navigation, and cannot meet the performance requirements of vertical guidance navigation channels below 200 feet (Localized Performance with Vertical guidance, LPV-200) defined by ICAO. Advanced Receiver Autonomous Integrity Monitoring (Advanced RAIM, ARAIM) is a solution designed b...

AI Technical Summary

Problems solved by technology

[0009] Advanced receiver autonomous integrity monitoring is implemented based on multi-constellation satellite navigation systems, but existing studies have shown that the spatial performance differences between different satellite navigation systems will reduce the availability of ARAIM, especially satellite failures, satellite service interruptions, etc. will aggravate the gap between different constellations. The difference in performance has a serious impact on the global availability of ARAIM; at the same time, current research shows that under normal constellation conditions, two global satellite navigation system satellites can basically achieve ARAIM's global seamless coverage; in addition, more constellations and more satellites The use of will increase the number of failure modes, increase the probability of failure, and increase the burden and pressure of receiver data processing

Images