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Availability, continuity and completeness index distribution method of satellite navigation system

A technology for satellite navigation system and index allocation, which is applied in the field of satellite navigation system availability, continuity, and integrity index allocation, and can solve problems such as the inability to meet the allocation requirements of heterogeneous and complex mixed constellation indexes, and the inability to realize the allocation of continuity and integrity indexes, etc.

Inactive Publication Date: 2017-05-03
CHINA AEROSPACE STANDARDIZATION INST
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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.

Method used

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  • Availability, continuity and completeness index distribution method of satellite navigation system
  • Availability, continuity and completeness index distribution method of satellite navigation system
  • Availability, continuity and completeness index distribution method of satellite navigation system

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Embodiment 1

[0037] Embodiment 1. The present invention provides a method for assigning availability, continuity and integrity indicators of a satellite navigation system, which decomposes service availability, continuity, and integrity indicators into single-satellite signal availability, continuity, and integrity indicators, and then decomposes them into long-term Three types of outage indicators, namely outage, short-term planned outage, and short-term unplanned outage, can provide an effective method that is operable and easy to implement for the allocation of service performance indicators. The specific process is as figure 1 shown, including the following steps:

[0038] Step 1, constellation state probability calculation.

[0039] According to the constellation value α of the satellite navigation system k,n and service availability A service , where M is the total number of satellites in the constellation, is the number of all combinations in which k satellites are faulty among...

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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 reliability field of satellite navigation systems, and in particular relates to a method for allocating indicators of availability, continuity and integrity of satellite navigation systems. Background technique [0002] The satellite navigation system is an important space infrastructure that directly provides users with all-weather, all-time, high-precision services. The core of building a highly reliable satellite navigation system is to achieve high-quality system service performance such as availability, continuity and integrity. Interruption is an important indicator that directly reflects the health of satellite signals, and 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 is composed of satel...

Claims

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Application Information

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IPC IPC(8): G01S19/01
CPCG01S19/01
Inventor 李海生卿寿松郑恒龚佩佩杨卓鹏薛恩任立明栾家辉
Owner CHINA AEROSPACE STANDARDIZATION INST
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