Portable GNSS Reference Station for Local Differential Corrections
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Solution Overview
Problem
Current GNSS/GPS systems require expensive dual frequency receivers and subscription-based services for accurate differential corrections, making it costly to deploy a differential reference station for local area coverage, especially for applications like agriculture that need high accuracy relative positioning.
Innovation Solution
A system and method for a reference receiver to determine its current location, compare it with stored locations, and establish or retrieve a reference location within a selected threshold, using GNSS signals to compute and transmit differential corrections to remote receivers, enabling cost-effective and rapid deployment of a differential reference station for local area coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dual frequency receivers and subscription-based services are used for accurate differential corrections, then positioning accuracy is improved, but system cost increases
Solution Approach 1:
The patent employs a single frequency GPS receiver instead of expensive dual frequency receivers, using a cost-effective, simpler receiver design that achieves adequate positioning accuracy for agricultural applications without requiring premium hardware
Solution Approach 2:
The system generates its own differential corrections by using the GPS receiver's computed position as the reference location, eliminating the need for subscription-based correction services or externally maintained reference stations
2Measurement precision
If a differential reference station is deployed for local area coverage, then positioning accuracy is improved, but deployment complexity increases
Solution Approach 1:
The GPS receiver automatically uses its own computed position as the reference location for generating differential corrections, eliminating the need for separate reference station setup, coordinate registration, and maintenance procedures
Solution Approach 2:
The system combines the functions of a GPS receiver and a differential reference station into a single unit, allowing the same device to both determine position and generate corrections without requiring separate infrastructure
3Measurement precision
If manual reference location setup is required, then absolute position accuracy is improved, but operation time increases
Solution Approach 1:
The system automatically determines and uses its own computed GPS position as the reference location, eliminating the need for manual surveying, coordinate entry, or external reference data setup
Solution Approach 2:
The GPS receiver pre-computes its position using standard GPS processing, which is then automatically adopted as the reference location before differential correction generation begins, streamlining the operational sequence
Data Source
AI summary
A method and system for local computation of information to improve accuracy in a differential Global Navigation Satellite Systems (GNSS). The method comprising: determining a current location of a reference receiver; comparing the current location with at least one stored location; if a resultant of the comparing is less than a selected threshold, identifying as a reference location the at least one stored location, which is closest to the current location; otherwise establishing the current location as the reference location and storing the current location. The method also includes computing the information from signals from one or more GNSS satellites the based on the reference location; and transmitting the information for reception by one or more remote receivers.