Mobile GNSS Receivers as Dynamic Reference Stations for Atmospheric Correction
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Solution Overview
Problem
Current satellite navigation systems face inaccuracies due to changes in signal propagation time in the ionosphere and troposphere, which are not effectively corrected by traditional methods, especially in highly automated driving applications.
Innovation Solution
A method and device that utilize mobile satellite receivers in an immobile state to generate correction data for differential satellite navigation systems, allowing for accurate position determination by processing sensor signals and satellite signals to account for atmospheric disturbances, and using a network of mobile receivers as reference stations to improve positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional fixed reference stations are used for correcting atmospheric disturbances, then position determination accuracy is improved, but device complexity and infrastructure requirements increase
Solution Approach 1:
The patent transforms the static concept of fixed reference stations into a dynamic system where mobile satellite receivers can function as reference stations when in an immobile state. This dynamic approach allows any mobile receiver to contribute to correction data generation, eliminating the need for dedicated fixed infrastructure while maintaining accuracy.
Solution Approach 2:
Mobile satellite receivers are designed to perform multiple functions: they can operate as mobile receivers for position determination and simultaneously function as reference stations when stationary. This multi-functionality allows the same device to serve both navigation and correction data generation purposes, reducing overall system complexity.
2Measurement precision
If the number of reference stations is increased to improve correction accuracy, then position determination accuracy is improved, but cost and system complexity increase
Solution Approach 1:
Mobile satellite receivers automatically detect when they are in an immobile state using sensor signals and autonomously generate correction data without requiring manual deployment or operation of fixed reference stations. The system self-organizes correction data generation from available mobile receivers, reducing the need for additional infrastructure.
Solution Approach 2:
The system dynamically selects which mobile receivers function as reference stations based on their current state (mobile or immobile). This dynamic selection allows the system to utilize existing receivers for correction data generation without requiring a fixed network of dedicated reference stations.
3Device complexity
If mobile satellite receivers are used as reference stations, then infrastructure requirements are reduced, but reliability of reference station positioning may worsen
Solution Approach 1:
Sensor signals continuously monitor the state of mobile satellite receivers to detect when they are in an immobile state. This feedback mechanism ensures that only receivers with stable, reliable positioning (when stationary) are selected to generate correction data, maintaining reliability while using mobile infrastructure.
Solution Approach 2:
The patent replaces the mechanical/physical fixed reference station infrastructure with a sensor-based detection system that identifies immobile mobile receivers. This substitution uses electronic sensing and data processing instead of physical infrastructure, reducing complexity while maintaining reliability through state monitoring.
Data Source
AI summary
A method for providing raw correction data for correcting atmospheric disturbances for satellite navigation includes checking whether a mobile satellite receiver for satellite navigation is in an immobile state using at least one sensor signal. The sensor signal represents a measurement variable dependent on a state of movement of the mobile satellite receiver. The method further includes evaluating at least one satellite signal transmitted between at least one satellite and the mobile satellite receiver in the immobile state with regard to a signal property dependent on atmospheric disturbances in order to generate the raw correction data. The raw correction data represents an item of information regarding the atmospheric disturbances.