GNSS Base Station Tectonic Velocity Correction
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Solution Overview
Problem
Current Global Navigation Satellite System (GNSS) positioning technologies, such as RTK and DGNSS, face inaccuracies due to variations in base station coordinate epochs, particularly due to tectonic motion, which can result in positioning errors of up to several centimeters over time.
Innovation Solution
Incorporating plate tectonic model information to update base station locations, using RTCM messages to transmit coordinate and epoch information, and computing base station velocity vectors to correct for tectonic displacement, thereby improving the accuracy of positioning calculations in RTK and DGNSS systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional GNSS positioning methods (RTK, DGNSS) are used without tectonic corrections, then the positioning system operates with standard base station coordinates, but positioning accuracy deteriorates over time due to tectonic motion causing errors of several centimeters
Solution Approach 1:
The system pre-calculates and stores velocity vectors for base stations based on tectonic plate models before positioning operations begin. When positioning is needed, these pre-computed velocity vectors are applied to extrapolate base station coordinates to the current epoch, eliminating the need for real-time tectonic calculations and enabling rapid coordinate updates.
Solution Approach 2:
The system dynamically updates base station coordinates by applying time-dependent tectonic velocity vectors to the original coordinate measurements. This transforms static base station coordinates into time-varying parameters that automatically adapt to tectonic plate motion, maintaining positioning accuracy without requiring frequent re-measurements.
2Measurement precision
If base station coordinates are frequently re-measured to account for tectonic motion, then positioning accuracy is maintained, but the complexity and cost of the positioning system increases
Solution Approach 1:
The system replaces the mechanical field measurement process with computational tectonic modeling. Instead of physically re-measuring base station coordinates using GNSS receivers and processing equipment, the system uses mathematical models of plate tectonics to calculate coordinate changes, dramatically reducing system complexity while maintaining accuracy.
Solution Approach 2:
The patent introduces tectonic velocity vectors as an intermediary element between base station coordinates and mobile device positioning calculations. These vectors serve as correction parameters that bridge the gap between static coordinate measurements and dynamic tectonic plate motion, simplifying the overall positioning model.
3Measurement precision
If base station velocity information is obtained from plate tectonic models, then positioning accuracy is improved by correcting for tectonic displacement, but the complexity of data processing increases
Solution Approach 1:
The system uses a universal plate tectonic model that provides velocity vectors for multiple base stations across different tectonic plates through a single unified framework. This multi-functional approach allows the same tectonic model to serve numerous positioning applications simultaneously, reducing individual processing complexity while maintaining accuracy.
Data Source
AI summary
Techniques are provided for applying plate tectonic model information to improve the accuracy of base station assisted satellite navigation systems. An example method for determining a location of a mobile device includes receiving base station measurement, coordinate and epoch information, receiving base station velocity information, receiving signals from a plurality of satellite vehicles, and determining the location of the mobile device based on the signals received from the plurality of satellite vehicles, the base station measurement, coordinate and epoch information, and the station velocity information.