Precision and risk balanced GNSS position service method and system

A risk-balancing, location-based service technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the problems of limited estimation accuracy, reliability without external benchmarks, and limited number of observations. achieve the effect of ensuring reliability and safety
CN108490459AActive Publication Date: 2018-09-04QIANXUN SPATIAL INTELLIGENCE INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QIANXUN SPATIAL INTELLIGENCE INC
Publication Date
2018-09-04

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Abstract

A GNSS terminal can provide information including a user position, speed and corresponding variance estimated value only at present, an interval of a true position value and a corresponding probability can be reckoned according to probability theory related theories, and in piratical application, the reliability of the variance estimated value cannot be ensured, and the risk that the true value isnot within the reckoning interval cannot be pre-estimated. Thus, a satellite-based and ground-based integrated enhanced system scheme and a matched realization strategy of a terminal are provided, position information, a protection interval and corresponding risk can be provided for the user, and a user can make a decision. In addition, the range of the protection interval is intrinsically associated with the risk level, so that different ranges of protection intervals and risks thereof are provided, and the user can make a balance between the precision and risk.
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Description

technical field

[0001] The invention relates to the technical field of high-precision GNSS satellite positioning, in particular to a method and system for applying GNSS position service with balance of precision and risk. Background technique

[0002] 1. GNSS positioning technology

[0003] GNSS (Global Navigation Satellite System), including China's Beidou, American GPS, Russia's GLOANASS and Europe's GALILEO, can provide users with all-weather three-dimensional coordinates, speed and time information. By analyzing the electromagnetic wave signal transmitted by the satellite terminal, the terminal can obtain information such as the position of the satellite and the distance between the terminal and the satellite. When 4 or more satellites are observed at the same time, it can realize single-point positioning through simple geometric relationships.

[0004] The observations interpreted by the GNSS terminal will be affected by various error sources, mainly including: satelli...

Claims

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