GNSS Atmospheric Correction Transformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current Global Navigation Satellite System (GNSS) receivers face challenges in achieving decimeter-level positioning accuracy due to the incompatibility of correction data from different systems, requiring lengthy convergence times as each system uses unique algorithms and data formats, preventing the direct utilization of atmospheric correction data across systems.
Innovation Solution
A method where a GNSS receiver at a client device transforms atmospheric correction data from one system into a usable form for another system by calculating a full range-level correction difference value, allowing the adjustment of atmospheric correction values to be used with different correction data sets, thereby enabling faster convergence to decimeter-level accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction data from different correction systems is used directly without transformation, then each system maintains its own algorithm integrity and data format consistency, but the GNSS receiver cannot readily utilize atmospheric correction data from different systems and requires lengthy convergence times to achieve decimeter-level positioning accuracy
Solution Approach 1:
The patent introduces an atmospheric correction transformation mechanism that acts as an intermediary between different correction systems. The receiver calculates a transformation value based on the difference between total correction values from two systems, then applies this transformation to atmospheric correction data from one system to make it compatible with another system's correction data, enabling cross-system utilization without lengthy re-convergence
Solution Approach 2:
The patent transforms atmospheric correction parameters by calculating the difference between total correction values from different systems and applying this difference to transform atmospheric correction data. This parameter transformation allows atmospheric correction data from one system to be used with correction data from another system, reducing convergence time while maintaining positioning accuracy
2Reliability
If each correction system uses its own specific algorithms and data formats, then each system maintains its own correction quality and reliability, but correction data from one system cannot be readily utilized with correction data from another system
Solution Approach 1:
The transformation mechanism serves as an intermediary that bridges different correction systems. By calculating transformation values based on total correction value differences and applying them to atmospheric correction data, the system enables compatibility between different correction systems while preserving the integrity and reliability of each system's original correction data
Solution Approach 2:
The patent enables atmospheric correction data from any correction system to be universally used with correction data from other systems through the transformation mechanism. This multi-functionality allows the GNSS receiver to utilize atmospheric corrections from different sources (e.g., WAAS, EGNOS, GPS) with correction data from different systems, enhancing versatility while maintaining reliability
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A Global Navigation Satellite System (GNSS) receiver at a client device receives first correction data from a first correction system that includes, but is not limited to, a first orbit correction value, a first clock correction value, and a first code or phase bias correction value. The GNSS receiver also receives second correction data from a second correction system that includes, but is not limited to, a second orbit correction value, a second clock correction value, a second code or phase bias correction value, and an atmospheric correction value. The GNSS receiver determines a difference between a sum of the first correction data and a sum of the second correction data to calculate a difference value that is utilized to adjust the atmospheric correction value received from the second correction system. The adjusted correction value may be utilized with the first correction data to determine position while mitigating errors.