A Method for Allocation of Availability Continuity Integrity Index of Satellite Navigation System

Abstract

The invention discloses an availability, continuity and completeness index distribution method of a satellite navigation system. The method comprises the following steps that according to a constellation value and service availability of the satellite navigation system, a service availability calculation formula is used to obtain a constellation state probability; a constellation state probability calculation formula is used to obtain the availability of a single-satellite signal; according to the availability and service continuity of the single-satellite signal, a condition probability of visible satellite interruption is obtained; the continuity of the single-satellite signal is obtained; average interval time of short-time non-planed interruption is obtained; according to faultless missed probability and out-of-tolerance missed alarm probability of a spatial signal and the risk of service completeness, a completeness risk of the single-satellite signal is obtained, and further, average interval time of interruption caused by a soft fault and average interval time of interruption caused by a hard fault are obtained; average recovery time of short-time non-planned interruption is obtained; and according to the average interval time and average recovery time of short-time non-planned interruption, interruption design of the satellite navigation system is carried out.

Description

technical field [0001] The invention belongs to the field of satellite navigation system reliability, and in particular relates to a method for allocating availability continuity integrity indicators of a satellite navigation system. Background technique [0002] Satellite navigation system is an important space infrastructure that directly provides users with all-weather, all-day and high-precision services. The core of building a highly reliable satellite navigation system is to achieve system service performance such as high-quality availability, continuity and integrity. Interruption is an important indicator that directly reflects the health status of satellite signals, which can provide reliability basis and guidance for system development and construction. [0003] my country's Beidou satellite navigation system has been put into operation, and the system's public service performance indicators have been announced to the world. Its space segment consists of three sat...

AI Technical Summary

Problems solved by technology

The US GPS satellite navigation system uses the Markov chain to carry out the allocation of availability indicators. This method is suitable for constellations composed of similar orbits, and cannot meet the needs of index allocation for heterogeneous and complex mixed constellations, and cannot achieve the allocation of continuity and integrity indicators.

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