RTK-GNSS Error Estimation for Positioning Without RTK Corrections
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Solution Overview
Problem
Existing RTK-GNSS positioning systems face challenges in maintaining high-precision positioning when base station reception information or RTK correction information is unavailable, leading to decreased work efficiency and accuracy due to the need for additional receivers like PPP-RTK, which increases cost.
Innovation Solution
An RTK-GNSS positioning system that derives error estimation information to correct mobile station reception without RTK correction information, using a base station and mobile station with calculation units to store and derive error estimation, allowing continuous high-accuracy positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PPP-RTK method is adopted to maintain positioning accuracy when RTK correction information is unavailable, then positioning accuracy is improved, but device complexity and cost increase due to requiring additional dedicated receivers
Solution Approach 1:
The mobile station uses its own received satellite signal information and the error estimation information derived from RTK correction data to self-correct positioning errors. The system leverages the mobile station's existing reception capabilities and computational units to generate corrected position information without requiring external PPP correction services or additional dedicated receivers, thereby achieving self-sufficient error correction.
Solution Approach 2:
The patent introduces error estimation information as an intermediary element that mediates between the raw satellite signal reception and the final positioning output. This error estimation information, derived from analyzing RTK correction patterns, serves as a corrective intermediary that allows the mobile station to compensate for positioning errors using its existing RTK receiver and calculation units, eliminating the need for additional PPP correction infrastructure.
2Reliability
If automatic traveling stops when base station or mobile station cannot receive reception information, then positioning safety is improved, but productivity decreases due to work interruptions
Solution Approach 1:
The system performs preliminary derivation of error estimation information from RTK correction data before positioning failures occur. By continuously monitoring and pre-calculating error patterns from available RTK correction information, the system prepares correction models in advance that can be immediately applied when satellite signal reception deteriorates, ensuring continuous positioning capability without abrupt stops.
Solution Approach 2:
The patent implements beforehand cushioning by deriving and storing error estimation information that acts as a buffer against positioning failures. When the mobile station cannot receive satellite signals or RTK correction information, the pre-derived error estimation information provides a cushioning effect, allowing the system to maintain positioning accuracy through interpolated or predicted correction values rather than stopping operation.
3Measurement precision
If RTK correction information is used for positioning, then positioning accuracy is improved, but system reliability decreases when base station or mobile station cannot receive reception information
Solution Approach 1:
The system dynamically changes the operational parameters based on reception availability. When RTK correction information is available, the system uses standard RTK processing; when reception fails, the system switches to using error estimation information derived from patterns in the RTK correction data itself. This parameter change allows the system to maintain positioning accuracy across different reception conditions without relying on continuous external correction signals.
Data Source
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AI summary
There are provided an RTK-GNSS positioning system (1) and an RTK-GNSS positioning method capable of deriving error estimation information for correcting an error of mobile station reception information without using RTK correction information. An RTK-GNSS positioning system (1) according to an aspect of the present disclosure includes a base station (10) including a first reception unit (11) for receiving base station reception information from a satellite (SAT), a mobile station (20) including a second reception unit (211) for receiving mobile station reception information from a satellite (SAT), a first calculation unit (13) for deriving RTK correction information on the basis of the base station reception information, a second calculation unit (213) for deriving error estimation information for correcting an error of the mobile station reception information on the basis of the RTK correction information and the mobile station reception information, and a storage unit for storing the error estimation information.