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Integrity assessment method of ground base strengthening system

A ground-based augmentation system and integrity technology, which is applied in the field of integrity assessment of ground-based augmentation systems, can solve problems such as inaccurate integrity assessment results, large errors, and conservative estimates, and achieve the effect of integrity assessment

Active Publication Date: 2015-08-19
BEIHANG UNIV
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Problems solved by technology

[0004] However, the integrity assessment method implemented by the above statistical method only considers the characteristic information of the positioning error, the calculated integrity risk estimate is too conservative, the integrity assessment result obtained is not accurate, and the error is relatively large

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  • Integrity assessment method of ground base strengthening system

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Embodiment Construction

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0018] Satellite navigation (Satellite navigation) refers to the technology of using navigation satellites to navigate and position users on the ground, ocean, air and space. , time service, search and rescue, geodesy and meteorological services and other multi-purpose integrated satellite systems.

[0019] When using satellite navigation signals...

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Abstract

The present invention provides an integrity assessment method of a ground base strengthening system. The method comprises the steps of collecting the positioning error sample and protection level sample of the ground base strengthening system according to the working states of at least three reference receivers and at least four ranging sources, processing the positioning error sample by using the protection level sample, obtaining the safety factor sample of the ground base strengthening system, forming a safety factor sequence, estimating the distribution of the safety factor sequence, obtaining the integrity risk assessment value of the safety factor sequence, and finally comparing the integrity risk assessment value and the integrity risk alarm value distributed in a ground base strengthening system performance standard to obtain the integrity assessment result of the ground base strengthening system. According to the method, the integrity assessment result of a protection level is simplified and fined systematically, and the integrity assessment of the ground base strengthening system is realized.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to an integrity assessment method of a ground-based augmentation system. Background technique [0002] Ground Based Augmentation System (Ground Based Augmentation System, referred to as GBAS) establishes a ground reference station with a known position and adopts differential technology to improve the accuracy of navigation signal ranging, while also monitoring the integrity of navigation signals in real time, so that satellite navigation The navigation service provided in the local airspace (for example, within 50km from the GBAS ground station) can meet the corresponding flight performance requirements. Whether the installed ground-based augmentation system can meet the navigation performance requirements of the terminal area needs to be investigated from four aspects: accuracy, continuity, integrity and usability. However, integrity is the premise of availability an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/20
CPCG01S19/20
Inventor 王志鹏朱衍波方堃淡志强
Owner BEIHANG UNIV
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