Reference Station Integrity Monitoring in GNSS Correction Systems
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Solution Overview
Problem
Monitoring the integrity of reference stations in a correction service system for satellite navigation is challenging due to the lack of independent observation variables, making it time-consuming and costly to identify stations with integrity issues, which can lead to incorrect correction values and affect position determination accuracy.
Innovation Solution
A method is introduced where a first group of reference stations receive satellite signals, and by comparing coordinates determined using these signals with known coordinates, correction values are ascertained and used to monitor the integrity of individual reference stations, allowing for quick identification of stations with integrity issues by checking for deviations, thereby ensuring precise position determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional monitoring methods are used to check reference station integrity, then comprehensive coverage can be achieved, but the process becomes extremely time-consuming and cost-intensive
Solution Approach 1:
The patent divides the network of reference stations into multiple groups, where each group is monitored independently by excluding one station at a time. This segmentation allows parallel processing of integrity checks across different station groups, significantly reducing the total monitoring time while maintaining comprehensive coverage of all stations.
Solution Approach 2:
The patent introduces correction values as intermediary elements that are generated by reference stations but can be independently verified. These correction values serve as mediators between the reference stations and the monitoring system, enabling indirect but effective integrity checking without requiring direct observation of each station's internal operations.
2Reliability
If traditional monitoring methods are used to check reference station integrity, then comprehensive coverage can be achieved, but the process becomes extremely cost-intensive
Solution Approach 1:
By segmenting the reference station network into manageable groups and processing them in parallel, the patent reduces the computational resources and time required for integrity monitoring. This segmentation strategy maintains thorough monitoring coverage while significantly improving productivity and reducing costs associated with comprehensive monitoring.
Solution Approach 2:
The reference stations themselves generate the correction values that are used for their own integrity monitoring. This self-service approach eliminates the need for external monitoring infrastructure and reduces the overall cost of integrity checking, as the stations use their own operational data to verify their own functionality.
3Reliability
If correction values are generated using all reference stations, then comprehensive correction coverage is achieved, but any single station failure affects all corrections
Solution Approach 1:
The patent segments the correction generation process by creating multiple correction value sets, each generated by a different reference station excluding one specific station. This segmentation isolates the impact of individual station failures to specific correction sets, preventing a single point of failure from affecting all corrections while maintaining comprehensive coverage through multiple independent correction sources.
Data Source
AI summary
A method for monitoring an integrity of reference stations, having known and fixed coordinates, of a correction service system for a satellite-supported navigation system. A first group of the reference stations is operated to receive satellite signals of a plurality of satellites of the satellite-supported navigation system. It is provided that a) a first reference station is selected from the first group, and b) at least one first correction value is ascertained as a function of the satellite signals respectively received by the remaining reference stations of the first group, and c) the monitoring of the integrity is carried out in that first coordinates of the first reference station, determined using the satellite signals received by the first reference station and using the at least one first correction value, are compared with the known coordinates of the first reference station and checked for at least one first deviation.