Dynamic constellation selection method for advanced receiver autonomous integrity monitoring

Abstract

The invention, which belongs to the technical field of satellite navigation, discloses a dynamic constellation selection method for advanced receiver autonomous integrity monitoring. The advanced receiver autonomous integrity monitoring (ARAIM) is a receiver-side fault diagnosis and integrity monitoring technology of a multi-constellation satellite navigation system. The invention puts forward a dynamic constellation selection method so as to solve a problem of ARAIM global availability reduction directly caused by fault subset positioning difference increasing due to the space constellation geometrical configuration differences of different satellite navigation systems. The geometric configurations of different constellations are evaluated and ranked; and two systems with the optimal space constellations are selected to carry out positioning solution and integrity monitoring. With the disclosed method, the influence on the ARAIM availability by the spatial configuration differences ofdifferent systems can be reduced effectively; the ARAIM availability is improved; the computational complexity is reduced; and the computational efficiency of integrity monitoring is improved. The method is suitable for autonomous integrity monitoring application of the satellite navigation receiver and the same concept is suitable for 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...

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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

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